{"id":159,"date":"2024-10-17T10:00:43","date_gmt":"2024-10-17T02:00:43","guid":{"rendered":"https:\/\/www.zdpokemon.top\/?p=159"},"modified":"2024-10-17T10:01:56","modified_gmt":"2024-10-17T02:01:56","slug":"%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e5%9f%ba%e7%a1%80%e7%af%87","status":"publish","type":"post","link":"https:\/\/www.zdpokemon.top\/index.php\/2024\/10\/17\/%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e5%9f%ba%e7%a1%80%e7%af%87\/","title":{"rendered":"\u9762\u5411\u5bf9\u8c61\u57fa\u7840\u7bc7"},"content":{"rendered":"\n
\"image-20220918121719900\"\/<\/div><\/figure>\n\n\n\n

<\/h1>\n\n\n\n

\u6211\u4eec\u5728\u524d\u9762\u5df2\u7ecf\u5b66\u4e60\u4e86\u9762\u5411\u8fc7\u7a0b\u7f16\u7a0b\uff0c\u4e5f\u53ef\u4ee5\u81ea\u884c\u7f16\u5199\u51fa\u7b80\u5355\u7684\u7a0b\u5e8f\u4e86\u3002\u6211\u4eec\u63a5\u7740\u5c31\u9700\u8981\u8ba4\u8bc6 \u9762\u5411\u5bf9\u8c61\u7a0b\u5e8f\u8bbe\u8ba1\uff08Object Oriented Programming\uff09\u5b83\u662f\u6211\u4eec\u5728Java\u8bed\u8a00\u4e2d\u8981\u5b66\u4e60\u7684\u91cd\u8981\u5185\u5bb9\uff0c\u9762\u5411\u5bf9\u8c61\u4e5f\u662f\u9ad8\u7ea7\u8bed\u8a00\u7684\u4e00\u5927\u91cd\u8981\u7279\u6027\u3002<\/p>\n\n\n\n

\n

\u9762\u5411\u5bf9\u8c61\u662f\u65b0\u624b\u6210\u957f\u7684\u4e00\u9053\u5206\u6c34\u5cad\uff0c\u6709\u7684\u4eba\u79d2\u61c2\uff0c\u6709\u7684\u4eba\u76f4\u5230\u6700\u540e\u90fd\u65e0\u6cd5\u7406\u89e3\u3002<\/p>\n<\/blockquote>\n\n\n\n

\u8fd9\u4e00\u7ae0\u5f00\u59cb\u96be\u5ea6\u5c31\u4e0a\u6765\u4e86\uff0c\u6240\u4ee5\u8bf4\u8bf7\u5404\u4f4d\u5c0f\u4f19\u4f34\u4e00\u5b9a\u8ba4\u771f\u3002<\/p>\n\n\n\n

\u7c7b\u4e0e\u5bf9\u8c61<\/h2>\n\n\n\n

\u7c7b\u7684\u6982\u5ff5\u6211\u4eec\u5728\u751f\u6d3b\u4e2d\u5176\u5b9e\u5df2\u7ecf\u542c\u8bf4\u8fc7\u5f88\u591a\u4e86\u3002<\/p>\n\n\n\n

\u4eba\u7c7b\u3001\u9e1f\u7c7b\u3001\u9c7c\u7c7b… \u6240\u8c13\u7c7b\uff0c\u5c31\u662f\u5bf9\u4e00\u7c7b\u4e8b\u7269\u7684\u63cf\u8ff0\uff0c\u662f\u62bd\u8c61\u7684\u3001\u6982\u5ff5\u4e0a\u7684\u5b9a\u4e49\uff0c\u6bd4\u5982\u9e1f\u7c7b\uff0c\u5c31\u6cdb\u6307\u6240\u6709\u5177\u6709\u9e1f\u7c7b\u7279\u5f81\u7684\u52a8\u7269\u3002\u6bd4\u5982\u4eba\u7c7b\uff0c\u4e0d\u540c\u7684\u4eba\uff0c\u6709\u7740\u4e0d\u540c\u7684\u6027\u683c\u3001\u4e0d\u540c\u7684\u7231\u597d\u3001\u4e0d\u540c\u7684\u6837\u8c8c\u7b49\u7b49\uff0c\u4f46\u662f\u4ed6\u4eec\u6839\u672c\u4e0a\u90fd\u662f\u4eba\uff0c\u6240\u4ee5\u8bf4\u53ef\u4ee5\u5c06\u4ed6\u4eec\u62bd\u8c61\u63cf\u8ff0\u4e3a\u4eba\u7c7b\u3002<\/p>\n\n\n\n

\u5bf9\u8c61\u662f\u67d0\u4e00\u7c7b\u4e8b\u7269\u5b9e\u9645\u5b58\u5728\u7684\u6bcf\u4e2a\u4e2a\u4f53\uff0c\u56e0\u800c\u4e5f\u88ab\u79f0\u4e3a\u5b9e\u4f8b\uff08instance\uff09\u6211\u4eec\u6bcf\u4e2a\u4eba\u90fd\u662f\u4eba\u7c7b\u7684\u4e00\u4e2a\u5b9e\u9645\u5b58\u5728\u7684\u4e2a\u4f53\u3002<\/p>\n\n\n\n

\"image-20220919203119479\"\/<\/div><\/figure>\n\n\n\n

\u6240\u4ee5\u8bf4\uff0c\u7c7b\u5c31\u662f\u62bd\u8c61\u6982\u5ff5\u7684\u4eba\uff0c\u800c\u5bf9\u8c61\uff0c\u5c31\u662f\u5177\u4f53\u7684\u67d0\u4e00\u4e2a\u4eba\u3002<\/p>\n\n\n\n

    \n
  • A\uff1a\u662f\u8c01\u62ff\u8d70\u4e86\u6211\u7684\u624b\u673a\uff1f<\/li>\n\n\n\n
  • B\uff1a\u662f\u4e2a\u4eba\u3002\uff08\u67d0\u4e00\u4e2a\u7c7b\uff09<\/li>\n\n\n\n
  • A\uff1a\u6211\u8fd8\u77e5\u9053\u662f\u4e2a\u4eba\u5462\uff0c\u5177\u4f53\u662f\u8c01\u5462\uff1f<\/li>\n\n\n\n
  • B\uff1a\u662fXXX\u3002\uff08\u5177\u4f53\u67d0\u4e2a\u5bf9\u8c61\uff09<\/li>\n<\/ul>\n\n\n\n

    \u800c\u6211\u4eec\u5728Java\u4e2d\uff0c\u4e5f\u53ef\u4ee5\u50cf\u8fd9\u6837\u8fdb\u884c\u7f16\u7a0b\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u7c7b\uff0c\u7136\u540e\u8fdb\u4e00\u6b65\u521b\u5efa\u8bb8\u591a\u8fd9\u4e2a\u7c7b\u7684\u5b9e\u4f8b\u5bf9\u8c61\u3002\u50cf\u8fd9\u79cd\u7f16\u7a0b\u65b9\u5f0f\uff0c\u6211\u4eec\u79f0\u4e3a\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b<\/strong>\u3002<\/p>\n\n\n\n

    \u7c7b\u7684\u5b9a\u4e49\u4e0e\u5bf9\u8c61\u521b\u5efa<\/h3>\n\n\n\n

    \u524d\u9762\u6211\u4eec\u4ecb\u7ecd\u4e86\u4ec0\u4e48\u662f\u7c7b\uff0c\u4ec0\u4e48\u662f\u5bf9\u8c61\uff0c\u9996\u5148\u6211\u4eec\u5c31\u6765\u770b\u770b\u5982\u4f55\u53bb\u5b9a\u4e49\u4e00\u4e2a\u7c7b\u3002<\/p>\n\n\n\n

    \u6bd4\u5982\u73b0\u5728\u6211\u4eec\u60f3\u8981\u5b9a\u4e49\u4e00\u4e2a\u4eba\u7c7b\uff0c\u6211\u4eec\u53ef\u4ee5\u53f3\u952esrc<\/code>\u76ee\u5f55\uff0c\u70b9\u51fb\u521b\u5efa\u65b0\u7684\u7c7b\uff1a<\/p>\n\n\n\n

    \"image-20220919204004526\"\/<\/div><\/figure>\n\n\n\n

    \u6211\u4eec\u5728\u5bf9\u7c7b\u8fdb\u884c\u547d\u540d\u65f6\uff0c\u4e00\u822c\u4f7f\u7528\u82f1\u6587\u5355\u8bcd\uff0c\u5e76\u4e14\u9996\u5b57\u6bcd\u5927\u5199\uff0c\u8ddf\u53d8\u91cf\u547d\u540d\u4e00\u6837\uff0c\u4e0d\u80fd\u51fa\u73b0\u4efb\u4f55\u7684\u7279\u6b8a\u5b57\u7b26\u3002<\/p>\n\n\n\n

    \"image-20220919204159248\"\/<\/div><\/figure>\n\n\n\n

    \u53ef\u4ee5\u770b\u5230\uff0c\u73b0\u5728\u6211\u4eec\u7684\u76ee\u5f55\u4e0b\u6709\u4e86\u4e24\u4e2a.java<\/code>\u6e90\u6587\u4ef6\uff0c\u5176\u4e2d\u4e00\u4e2a\u662f\u9ed8\u8ba4\u521b\u5efa\u7684Main.java\uff0c\u8fd8\u6709\u4e00\u4e2a\u662f\u6211\u4eec\u521a\u521a\u521b\u5efa\u7684\u7c7b\u3002<\/p>\n\n\n\n

    \u6211\u4eec\u6765\u770b\u770b\u521b\u5efa\u597d\u4e4b\u540e\uff0c\u4e00\u4e2a\u7c7b\u5199\u4e86\u54ea\u4e9b\u5185\u5bb9\uff1a<\/p>\n\n\n\n

    public class Person {
        
    }<\/pre>\n\n\n\n
    \u53ef\u4ee5\u53d1\u73b0\uff0c\u8fd9\u4e0d\u662f\u8ddf\u4e00\u5f00\u59cb\u521b\u5efa\u7684Main\u4e2d\u5199\u7684\u683c\u5f0f\u4e00\u6a21\u4e00\u6837\u5417\uff1f\u6ca1\u9519\uff0cMain\u4e5f\u662f\u4e00\u4e2a\u7c7b\uff0c\u53ea\u4e0d\u8fc7\u6211\u4eec\u4e00\u76f4\u90fd\u5c06\u5176\u5f53\u505a\u4e3b\u7c7b\u5728\u4f7f\u7528\uff0c\u4e5f\u5c31\u662f\u7f16\u5199\u4e3b\u65b9\u6cd5\u7684\u7c7b\uff0c\u5173\u4e8e\u65b9\u6cd5\u6211\u4eec\u4f1a\u5728\u540e\u9762\u8fdb\u884c\u4ecb\u7ecd\u3002<\/p>\n\n\n\n
    \u73b0\u5728\u6211\u4eec\u5c31\u521b\u5efa\u597d\u4e86\u4e00\u4e2a\u7c7b\uff0c\u65e2\u7136\u662f\u4eba\u7c7b\uff0c\u90a3\u4e48\u80af\u5b9a\u6709\u4eba\u76f8\u5173\u7684\u4e00\u4e9b\u5c5e\u6027\uff0c\u6bd4\u5982\u540d\u5b57\u3001\u6027\u522b\u3001\u5e74\u9f84\u7b49\u7b49\uff0c\u90a3\u4e48\u600e\u4e48\u624d\u80fd\u7ed9\u8fd9\u4e2a\u7c7b\u6dfb\u52a0\u4e00\u4e9b\u5c5e\u6027\u5462\uff1f<\/p>\n\n\n\n
    \u6211\u4eec\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u5c5e\u6027\u76f4\u63a5\u4f5c\u4e3a\u7c7b\u7684\u6210\u5458\u53d8\u91cf\uff08\u6210\u5458\u53d8\u91cf\u76f8\u5f53\u4e8e\u662f\u8fd9\u4e2a\u7c7b\u6240\u5177\u6709\u7684\u5c5e\u6027\uff0c\u6bcf\u4e2a\u5b9e\u4f8b\u521b\u5efa\u51fa\u6765\u4e4b\u540e\uff0c\u8fd9\u4e9b\u5c5e\u6027\u90fd\u53ef\u80fd\u4f1a\u5404\u4e0d\u76f8\u540c\uff09\u5b9a\u4e49\u5230\u7c7b\u4e2d\u3002<\/p>\n\n\n\n
    public class Person {   \/\/\u8fd9\u91cc\u5b9a\u4e49\u7684\u4eba\u7c7b\u5177\u6709\u4e09\u4e2a\u5c5e\u6027\uff0c\u540d\u5b57\u3001\u5e74\u9f84\u3001\u6027\u522b
        String name;   \/\/\u76f4\u63a5\u5728\u7c7b\u4e2d\u5b9a\u4e49\u53d8\u91cf\uff0c\u8868\u793a\u7c7b\u5177\u6709\u7684\u5c5e\u6027
        int age;
        String sex;
    }<\/pre>\n\n\n\n
    \u53ef\u80fd\u4f1a\u6709\u5c0f\u4f19\u4f34\u7591\u95ee\uff0c\u8fd9\u4e9b\u53d8\u91cf\u5565\u65f6\u5019\u88ab\u8d4b\u503c\u5462\uff1f\u5b9e\u9645\u4e0a\u8fd9\u4e9b\u53d8\u91cf\u53ea\u6709\u5728\u4e00\u4e2a\u5177\u4f53\u7684\u5bf9\u8c61\u4e2d\u624d\u53ef\u4ee5\u4f7f\u7528\u3002<\/p>\n\n\n\n
    \u90a3\u4e48\u73b0\u5728\u4eba\u7c7b\u7684\u5c5e\u6027\u90fd\u89c4\u5b9a\u597d\u4e86\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5c1d\u8bd5\u521b\u5efa\u4e00\u4e2a\u5b9e\u4f8b\u5bf9\u8c61\u4e86\uff0c\u5b9e\u4f8b\u5bf9\u5e94\u7684\u5e94\u8be5\u662f\u4e00\u4e2a\u5177\u4f53\u7684\u4eba\uff1a<\/p>\n\n\n\n
    new \u7c7b\u540d();<\/pre>\n\n\n\n
    public static void main(String[] args) {
        new Person();   \/\/\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528new\u5173\u952e\u5b57\u6765\u521b\u5efa\u67d0\u4e2a\u7c7b\u7684\u5bf9\u8c61\uff0c\u6ce8\u610fnew\u540e\u9762\u9700\u8981\u8ddf\u4e0a \u7c7b\u540d()
        \/\/\u8fd9\u91cc\u521b\u5efa\u51fa\u6765\u7684\uff0c\u5c31\u662f\u4e00\u4e2a\u5177\u4f53\u7684\u4eba\u4e86
    }<\/pre>\n\n\n\n
    \u5b9e\u9645\u4e0a\u6574\u4e2a\u6d41\u7a0b\u4e3a\uff1a<\/p>\n\n\n\n
    \"image-20220919205550104\"\/<\/div><\/figure>\n\n\n\n
    \u53ea\u4e0d\u8fc7\u8fd9\u91cc\u4ec5\u4ec5\u662f\u521b\u5efa\u51fa\u4e86\u8fd9\u6837\u7684\u4e00\u4e2a\u5bf9\u8c61\uff0c\u6211\u4eec\u76ee\u524d\u6ca1\u6709\u529e\u6cd5\u53bb\u64cd\u4f5c\u8fd9\u4e2a\u5bf9\u8c61\uff0c\u6bd4\u5982\u60f3\u8981\u4fee\u6539\u6216\u662f\u83b7\u53d6\u8fd9\u4e2a\u4eba\u7684\u540d\u5b57\u7b49\u7b49\u3002<\/p>\n\n\n\n
    \u5bf9\u8c61\u7684\u4f7f\u7528<\/h3>\n\n\n\n
    \u65e2\u7136\u73b0\u5728\u6211\u4eec\u77e5\u9053\u5982\u4f55\u521b\u5efa\u5bf9\u8c61\uff0c\u90a3\u4e48\u6211\u4eec\u600e\u4e48\u53bb\u8bbf\u95ee\u8fd9\u4e2a\u5bf9\u8c61\u5462\uff0c\u6bd4\u5982\u6211\u73b0\u5728\u60f3\u8981\u53bb\u67e5\u770b\u6216\u662f\u4fee\u6539\u5b83\u7684\u540d\u5b57\u3002<\/p>\n\n\n\n
    \u6211\u4eec\u540c\u6837\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u53d8\u91cf\u6765\u6307\u4ee3\u67d0\u4e2a\u5bf9\u8c61\uff0c\u53ea\u4e0d\u8fc7\u5f15\u7528\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u5b58\u50a8\u7684\u662f\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u800c\u4e0d\u662f\u5bf9\u8c61\u672c\u8eab\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        \/\/\u8fd9\u91cc\u7684a\u5b58\u653e\u7684\u662f\u5177\u4f53\u7684\u67d0\u4e2a\u503c
        int a = 10;
        \/\/\u521b\u5efa\u4e00\u4e2a\u53d8\u91cf\u6307\u4ee3\u6211\u4eec\u521a\u521a\u521b\u5efa\u597d\u7684\u5bf9\u8c61\uff0c\u53d8\u91cf\u7684\u7c7b\u578b\u5c31\u662f\u5bf9\u5e94\u7684\u7c7b\u540d
        \/\/\u8fd9\u91cc\u7684p\u5b58\u653e\u7684\u662f\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u800c\u4e0d\u662f\u672c\u4f53\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5bf9\u8c61\u7684\u5f15\u7528\u6765\u95f4\u63a5\u64cd\u4f5c\u5bf9\u8c61
        Person p = new Person();
    }<\/pre>\n\n\n\n
    \u81f3\u4e8e\u4e3a\u4ec0\u4e48\u5bf9\u8c61\u7c7b\u578b\u7684\u53d8\u91cf\u5b58\u653e\u7684\u662f\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u6bd4\u5982\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p1 = new Person();
        Person p2 = p1;
    }<\/pre>\n\n\n\n
    \u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u53d8\u91cfp2\u8d4b\u503c\u4e3ap1\u7684\u503c\uff0c\u90a3\u4e48\u5b9e\u9645\u4e0a\u53ea\u662f\u4f20\u9012\u4e86\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u800c\u4e0d\u662f\u5bf9\u8c61\u672c\u8eab\u7684\u590d\u5236\uff0c\u8fd9\u8ddf\u6211\u4eec\u524d\u9762\u7684\u57fa\u672c\u6570\u636e\u7c7b\u578b\u6709\u4e9b\u4e0d\u540c\uff0cp2\u548cp1\u90fd\u6307\u5411\u7684\u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\uff08\u5982\u679c\u4f60\u5b66\u4e60\u8fc7C\u8bed\u8a00\uff0c\u5b83\u5c31\u7c7b\u4f3c\u4e8e\u6307\u9488\u4e00\u6837\u7684\u5b58\u5728\uff09<\/p>\n\n\n\n
    \"image-20220919211443657\"\/<\/div><\/figure>\n\n\n\n
    \u6211\u4eec\u53ef\u4ee5\u6765\u6d4b\u8bd5\u4e00\u4e0b\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p1 = new Person();
        Person p2 = p1;
        System.out.println(p1 == p2);    \/\/\u4f7f\u7528 == \u53ef\u4ee5\u5224\u65ad\u4e24\u4e2a\u53d8\u91cf\u5f15\u7528\u7684\u662f\u4e0d\u662f\u540c\u4e00\u4e2a\u5bf9\u8c61
    }<\/pre>\n\n\n\n
    \u4f46\u662f\u5982\u679c\u6211\u4eec\u50cf\u8fd9\u6837\u53bb\u7f16\u5199\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p1 = new Person();   \/\/\u8fd9\u4e24\u4e2a\u53d8\u91cf\u5206\u522b\u5f15\u7528\u7684\u662f\u4e0d\u540c\u7684\u4e24\u4e2a\u5bf9\u8c61
        Person p2 = new Person();
        System.out.println(p1 == p2);   \/\/\u5982\u679c\u4e24\u4e2a\u53d8\u91cf\u5b58\u653e\u7684\u662f\u4e0d\u540c\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u90a3\u4e48\u80af\u5b9a\u5c31\u662f\u4e0d\u4e00\u6837\u7684\u4e86
    }<\/pre>\n\n\n\n
    \u5b9e\u9645\u4e0a\u6211\u4eec\u4e4b\u524d\u4f7f\u7528\u7684String\u7c7b\u578b\uff0c\u4e5f\u662f\u4e00\u4e2a\u5f15\u7528\u7c7b\u578b\uff0c\u6211\u4eec\u4f1a\u5728\u4e0b\u4e00\u7ae0\u8be6\u7ec6\u8ba8\u8bba\u3002\u6211\u4eec\u5728\u4e0a\u4e00\u7ae0\u4ecb\u7ecd\u7684\u90fd\u662f\u57fa\u672c\u7c7b\u578b\uff0c\u800c\u7c7b\u4f7f\u7528\u7684\u90fd\u662f\u5f15\u7528\u7c7b\u578b\u3002<\/p>\n\n\n\n
    \u73b0\u5728\u6211\u4eec\u6709\u4e86\u5bf9\u8c61\u7684\u5f15\u7528\u4e4b\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u8fdb\u884c\u64cd\u4f5c\u4e86\uff1a<\/p>\n\n\n\n
    \"image-20220919210058797\"\/<\/div><\/figure>\n\n\n\n
    \u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u5bf9\u8c61\u7684\u4e00\u4e9b\u5c5e\u6027\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u5728\u7c7b\u4e2d\u5b9a\u4e49\u597d\u7684\u90a3\u4e9b\uff0c\u5bf9\u4e8e\u4e0d\u540c\u7684\u5bf9\u8c61\uff0c\u8fd9\u4e9b\u5c5e\u6027\u90fd\u5177\u4f53\u5b58\u653e\u503c\u4e5f\u4f1a\u4e0d\u540c\u3002<\/p>\n\n\n\n
    \u6bd4\u5982\u6211\u4eec\u53ef\u4ee5\u4fee\u6539\u5bf9\u8c61\u7684\u540d\u5b57\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p = new Person();
        p.name = \"\u5c0f\u660e\";   \/\/\u8981\u8bbf\u95ee\u5bf9\u8c61\u7684\u5c5e\u6027\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528 . \u8fd0\u7b97\u7b26
        System.out.println(p.name);   \/\/\u76f4\u63a5\u6253\u5370\u5bf9\u8c61\u7684\u540d\u5b57\uff0c\u5c31\u662f\u6211\u4eec\u521a\u521a\u4fee\u6539\u597d\u7684\u7ed3\u679c\u4e86
    }<\/pre>\n\n\n\n
    \u6ce8\u610f\uff0c\u4e0d\u540c\u5bf9\u8c61\u7684\u5c5e\u6027\u662f\u5206\u5f00\u72ec\u7acb\u5b58\u653e\u7684\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u81ea\u5df1\u7684\u7a7a\u95f4\uff0c\u4fee\u6539\u4e00\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027\u5e76\u4e0d\u4f1a\u5f71\u54cd\u5230\u5176\u4ed6\u5bf9\u8c61\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p1 = new Person();
        Person p2 = new Person();
        p1.name = \"\u5c0f\u660e\";   \/\/\u8fd9\u4e2a\u4fee\u6539\u7684\u662f\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027
        p2.name = \"\u5927\u660e\";   \/\/\u8fd9\u91cc\u4fee\u6539\u7684\u662f\u7b2c\u4e8c\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027
        System.out.println(p1.name);  \/\/\u8fd9\u91cc\u6211\u4eec\u83b7\u53d6\u7684\u662f\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027
    }<\/pre>\n\n\n\n
    \u5173\u4e8e\u5bf9\u8c61\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u4e0d\u5bf9\u4efb\u4f55\u5bf9\u8c61\u8fdb\u884c\u5f15\u7528\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p1 = null;  \/\/null\u662f\u4e00\u4e2a\u7279\u6b8a\u7684\u503c\uff0c\u5b83\u8868\u793a\u7a7a\uff0c\u4e5f\u5c31\u662f\u4e0d\u5f15\u7528\u4efb\u4f55\u7684\u5bf9\u8c61
    }<\/pre>\n\n\n\n
    \u6ce8\u610f\uff0c\u5982\u679c\u4e0d\u5f15\u7528\u4efb\u4f55\u7684\u5bf9\u8c61\uff0c\u90a3\u80af\u5b9a\u662f\u4e0d\u5e94\u8be5\u53bb\u901a\u8fc7\u8fd9\u4e2a\u53d8\u91cf\u53bb\u64cd\u4f5c\u6240\u5f15\u7528\u7684\u5bf9\u8c61\u7684\uff08\u90fd\u6ca1\u6709\u5f15\u7528\u5bf9\u8c61\uff0c\u6211\u64cd\u4f5c\u8c01\u554a\u6211\uff09<\/p>\n\n\n\n
    \u867d\u7136\u8fd9\u6837\u53ef\u4ee5\u7f16\u8bd1\u901a\u8fc7\uff0c\u4f46\u662f\u5728\u8fd0\u884c\u65f6\u4f1a\u51fa\u73b0\u95ee\u9898\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p = null;   \/\/\u6b64\u65f6\u53d8\u91cf\u6ca1\u6709\u5f15\u7528\u4efb\u4f55\u5bf9\u8c61
        p.name = \"\u5c0f\u7ea2\";   \/\/\u6211\u4efb\u6027\uff0c\u5c31\u662f\u8981\u64cd\u4f5c
        System.out.println(p.name);
    }<\/pre>\n\n\n\n
    \u6211\u4eec\u6765\u5c1d\u8bd5\u8fd0\u884c\u4e00\u4e0b\u8fd9\u6bb5\u4ee3\u7801\uff1a<\/p>\n\n\n\n
    \"image-20220919213732810\"\/<\/div><\/figure>\n\n\n\n
    \u6b64\u65f6\u7a0b\u5e8f\u5728\u8fd0\u884c\u7684\u8fc7\u7a0b\u4e2d\uff0c\u51fa\u73b0\u4e86\u5f02\u5e38\uff0c\u867d\u7136\u6211\u4eec\u8fd8\u6ca1\u6709\u5b66\u4e60\u5230\u5f02\u5e38\uff0c\u4f46\u662f\u5404\u4f4d\u53ef\u4ee5\u5c06\u5f02\u5e38\u7406\u89e3\u4e3a\u7a0b\u5e8f\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u4e86\u95ee\u9898\uff0c\u6b64\u65f6\u4e0d\u5f97\u4e0d\u7ec8\u6b62\u7a0b\u5e8f\u9000\u51fa\u3002<\/p>\n\n\n\n
    \u8fd9\u91cc\u51fa\u73b0\u7684\u662f\u7a7a\u6307\u9488\u5f02\u5e38\uff0c\u5f88\u660e\u663e\u662f\u56e0\u4e3a\u6211\u4eec\u53bb\u64cd\u4f5c\u4e00\u4e2a\u503c\u4e3anull\u7684\u53d8\u91cf\u5bfc\u81f4\u7684\u3002\u5728\u6211\u4eec\u4ee5\u540e\u7684\u5b66\u4e60\u4e2d\uff0c\u8fd9\u4e2a\u5f02\u5e38\u662f\u51fa\u73b0\u9891\u7387\u6700\u9ad8\u7684\u3002<\/p>\n\n\n\n
    \u6211\u4eec\u6765\u770b\u6700\u540e\u4e00\u4e2a\u95ee\u9898\uff0c\u5bf9\u8c61\u521b\u5efa\u6210\u529f\u4e4b\u540e\uff0c\u5b83\u7684\u5c5e\u6027\u6ca1\u6709\u8fdb\u884c\u8d4b\u503c\uff0c\u4f46\u662f\u6211\u4eec\u524d\u9762\u8bf4\u4e86\uff0c\u53d8\u91cf\u4f7f\u7528\u4e4b\u524d\u9700\u8981\u5148\u8d4b\u503c\uff0c\u90a3\u4e48\u521b\u5efa\u5bf9\u8c61\u4e4b\u540e\u80fd\u5426\u76f4\u63a5\u8bbf\u95ee\u5462\uff1f<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p = new Person();
        System.out.println(\"name = \"+p.name);
        System.out.println(\"age = \"+p.age);
        System.out.println(\"sex = \"+p.sex);
    }<\/pre>\n\n\n\n
    \u6211\u4eec\u6765\u770b\u770b\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n
    \"image-20220919214248053\"\/<\/div><\/figure>\n\n\n\n
    \u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u5982\u679c\u76f4\u63a5\u521b\u5efa\u5bf9\u8c61\uff0c\u90a3\u4e48\u5bf9\u8c61\u7684\u5c5e\u6027\u90fd\u4f1a\u5b58\u5728\u521d\u59cb\u503c\uff0c\u5982\u679c\u662f\u57fa\u672c\u7c7b\u578b\uff0c\u90a3\u4e48\u9ed8\u8ba4\u662f\u7edf\u4e00\u4e3a0<\/code>\uff08\u5982\u679c\u662fboolean\u7684\u8bdd\uff0c\u9ed8\u8ba4\u503c\u4e3afalse\uff09\u5982\u679c\u662f\u5f15\u7528\u7c7b\u578b\uff0c\u90a3\u4e48\u9ed8\u8ba4\u662fnull<\/code>\u3002<\/p>\n\n\n\n
    \u65b9\u6cd5\u521b\u5efa\u4e0e\u4f7f\u7528<\/h3>\n\n\n\n
    \u524d\u9762\u6211\u4eec\u4ecb\u7ecd\u4e86\u7c7b\u7684\u5b9a\u4e49\u4ee5\u53ca\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u4f7f\u7528\u3002<\/p>\n\n\n\n
    \u73b0\u5728\u6211\u4eec\u7684\u7c7b\u6709\u4e86\u5c5e\u6027\uff0c\u6211\u4eec\u53ef\u4ee5\u4e3a\u521b\u5efa\u7684\u8fd9\u4e9b\u5bf9\u8c61\u8bbe\u5b9a\u4e0d\u540c\u7684\u5c5e\u6027\u503c\uff0c\u6bd4\u5982\u6bcf\u4e2a\u4eba\u7684\u540d\u5b57\u90fd\u4e0d\u4e00\u6837\uff0c\u6027\u522b\u4e0d\u4e00\u6837\uff0c\u5e74\u9f84\u4e0d\u4e00\u6837\u7b49\u7b49\u3002\u53ea\u4e0d\u8fc7\u5149\u6709\u5c5e\u6027\u8fd8\u4e0d\u884c\uff0c\u5bf9\u8c61\u8fd8\u9700\u8981\u5177\u6709\u4e00\u5b9a\u7684\u884c\u4e3a\uff0c\u5c31\u50cf\u6211\u4eec\u4eba\u53ef\u4ee5\u884c\u8d70\uff0c\u53ef\u4ee5\u8df3\u8dc3\uff0c\u53ef\u4ee5\u601d\u8003\u4e00\u6837\u3002<\/p>\n\n\n\n
    \u800c\u5bf9\u8c61\u4e5f\u53ef\u4ee5\u505a\u51fa\u4e00\u4e9b\u884c\u4e3a\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5b9a\u4e49\u65b9\u6cd5\u6765\u5b9e\u73b0\uff08\u5728C\u8bed\u8a00\u4e2d\u53eb\u505a\u51fd\u6570\uff09<\/p>\n\n\n\n
    \u65b9\u6cd5\u662f\u8bed\u53e5\u7684\u96c6\u5408\uff0c\u662f\u4e3a\u4e86\u5b8c\u6210\u67d0\u4ef6\u4e8b\u60c5\u800c\u5b58\u5728\u7684\u3002\u5b8c\u6210\u67d0\u4ef6\u4e8b\u60c5\uff0c\u53ef\u4ee5\u6709\u7ed3\u679c\uff0c\u4e5f\u53ef\u4ee5\u505a\u4e86\u5c31\u505a\u4e86\uff0c\u4e0d\u8fd4\u56de\u7ed3\u679c\u3002\u6bd4\u5982\u8ba1\u7b97\u4e24\u4e2a\u6570\u5b57\u7684\u548c\uff0c\u6211\u4eec\u9700\u8981\u5f97\u5230\u8ba1\u7b97\u540e\u7684\u7ed3\u679c\uff0c\u6240\u4ee5\u8bf4\u65b9\u6cd5\u9700\u8981\u6709\u8fd4\u56de\u503c\uff1b\u53c8\u6bd4\u5982\uff0c\u6211\u4eec\u53ea\u60f3\u5427\u6570\u5b57\u6253\u5370\u5728\u63a7\u5236\u53f0\uff0c\u53ea\u9700\u8981\u6253\u5370\u5c31\u884c\uff0c\u4e0d\u7528\u7ed9\u6211\u7ed3\u679c\uff0c\u6240\u4ee5\u8bf4\u65b9\u6cd5\u4e0d\u9700\u8981\u6709\u8fd4\u56de\u503c\u3002<\/p>\n\n\n\n
    \u65b9\u6cd5\u7684\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n\n\n\n
    \u8fd4\u56de\u503c\u7c7b\u578b \u65b9\u6cd5\u540d\u79f0() {
    \t\t\u65b9\u6cd5\u4f53...
    }<\/pre>\n\n\n\n
    \u9996\u5148\u662f\u8fd4\u56de\u503c\u7c7b\u578b\uff0c\u4e5f\u5c31\u662f\u8bf4\u8fd9\u4e2a\u65b9\u6cd5\u5b8c\u6210\u4efb\u52a1\u4e4b\u540e\uff0c\u5f97\u5230\u7684\u7ed3\u679c\u7684\u6570\u636e\u7c7b\u578b\uff08\u53ef\u4ee5\u662f\u57fa\u672c\u7c7b\u578b\uff0c\u4e5f\u53ef\u4ee5\u662f\u5f15\u7528\u7c7b\u578b\uff09\u5f53\u7136\uff0c\u5982\u679c\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u53ea\u662f\u5b8c\u6210\u4efb\u52a1\uff0c\u90a3\u4e48\u53ef\u4ee5\u4f7f\u7528void<\/code>\u8868\u793a\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u6bd4\u5982\u6211\u4eec\u73b0\u5728\u7ed9\u4eba\u7c7b\u7f16\u5199\u4e00\u4e2a\u81ea\u6211\u4ecb\u7ecd\u7684\u884c\u4e3a\uff1a<\/p>\n\n\n\n
    public class Person {
        String name;
        int age;
        String sex;

      \t\/\/\u81ea\u6211\u4ecb\u7ecd\u53ea\u9700\u8981\u5b8c\u6210\u5c31\u884c\uff0c\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u6240\u4ee5\u8bf4\u4f7f\u7528void
        void hello(){
          \t\/\/\u5b8c\u6210\u81ea\u6211\u4ecb\u7ecd\u9700\u8981\u6267\u884c\u7684\u6240\u6709\u4ee3\u7801\u5c31\u5728\u8fd9\u4e2a\u82b1\u62ec\u53f7\u4e2d\u7f16\u5199
          \t\/\/\u8fd9\u91cc\u7f16\u5199\u4ee3\u7801\u8ddf\u6211\u4eec\u4e4b\u524d\u5728main\u4e2d\u662f\u4e00\u6837\u7684\uff08\u5b9e\u9645\u4e0amain\u5c31\u662f\u4e00\u4e2a\u51fd\u6570\uff09
          \t\/\/\u81ea\u6211\u4ecb\u7ecd\u9700\u8981\u7528\u5230\u5f53\u524d\u5bf9\u8c61\u7684\u540d\u5b57\u548c\u5e74\u9f84\uff0c\u6211\u4eec\u76f4\u63a5\u4f7f\u7528\u6210\u5458\u53d8\u91cf\u5373\u53ef\uff0c\u53d8\u91cf\u7684\u503c\u5c31\u662f\u5f53\u524d\u5bf9\u8c61\u7684\u5b58\u653e\u503c
            System.out.println(\"\u6211\u53eb \"+name+\" \u4eca\u5e74 \"+age+\" \u5c81\u4e86\uff01\");
        }
    }<\/pre>\n\n\n\n
    \u6ce8\u610f\uff0c\u65b9\u6cd5\u540d\u79f0\u540c\u6837\u53ef\u4ee5\u968f\u4fbf\u8d77\uff0c\u4f46\u662f\u89c4\u5219\u8ddf\u53d8\u91cf\u7684\u547d\u540d\u5dee\u4e0d\u591a\uff0c\u4e5f\u662f\u5c3d\u91cf\u4f7f\u7528\u5c0f\u5199\u5b57\u6bcd\u5f00\u5934\u7684\u5355\u8bcd\uff0c\u5982\u679c\u662f\u591a\u4e2a\u5355\u8bcd\uff0c\u4e00\u822c\u4f7f\u7528\u9a7c\u5cf0\u547d\u540d\u6cd5\u6700\u89c4\u8303\u3002<\/p>\n\n\n\n
    \"image-20220920101033325\"\/<\/div><\/figure>\n\n\n\n
    \u73b0\u5728\u6211\u4eec\u7ed9\u4eba\u7c7b\u5b9a\u4e49\u597d\u4e86\u4e00\u4e2a\u65b9\u6cd5\uff08\u884c\u4e3a\uff09\u90a3\u4e48\u600e\u4e48\u624d\u80fd\u8ba9\u5bf9\u8c61\u6267\u884c\u8fd9\u4e2a\u884c\u4e3a\u5462\uff1f<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p = new Person();
        p.name = \"\u5c0f\u660e\";
        p.age = 18;
        p.hello();    \/\/\u6211\u4eec\u53ea\u9700\u8981\u4f7f\u7528 . \u8fd0\u7b97\u7b26\uff0c\u5c31\u53ef\u4ee5\u6267\u884c\u5b9a\u4e49\u597d\u7684\u65b9\u6cd5\u4e86\uff0c\u53ea\u9700\u8981 .\u65b9\u6cd5\u540d\u79f0() \u5373\u53ef
    }<\/pre>\n\n\n\n
    \u50cf\u8fd9\u6837\u6267\u884c\u5b9a\u4e49\u597d\u7684\u65b9\u6cd5\uff0c\u6211\u4eec\u4e00\u822c\u79f0\u4e3a\u65b9\u6cd5\u7684\u8c03\u7528<\/strong>\uff0c\u6211\u4eec\u6765\u770b\u770b\u6548\u679c\uff1a<\/p>\n\n\n\n
    \"image-20220919220837991\"\/<\/div><\/figure>\n\n\n\n
    \u6bd4\u5982\u73b0\u5728\u6211\u4eec\u8981\u8ba9\u4eba\u7c7b\u5b66\u4f1a\u52a0\u6cd5\u8fd0\u7b97\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5b9a\u4e49\u4e00\u4e2a\u65b9\u6cd5\u7684\u5f62\u5f0f\u6765\u5b8c\u6210\uff0c\u53ea\u4e0d\u8fc7\uff0c\u8981\u5b8c\u6210\u52a0\u6cd5\u8fd0\u7b97\uff0c\u6211\u4eec\u9700\u8981\u522b\u4eba\u7ed9\u4eba\u7c7b\u63d0\u4f9b\u4e24\u4e2a\u53c2\u4e0e\u52a0\u6cd5\u8fd0\u7b97\u7684\u503c\u624d\u53ef\u4ee5\uff0c\u6240\u4ee5\u6211\u4eec\u8fd9\u91cc\u5c31\u8981\u7528\u5230\u53c2\u6570\u4e86\uff1a<\/p>\n\n\n\n
    \/\/\u6211\u4eec\u7684\u65b9\u6cd5\u9700\u8981\u522b\u4eba\u63d0\u4f9b\u53c2\u4e0e\u8fd0\u7b97\u7684\u503c\u624d\u53ef\u4ee5
    \/\/\u6211\u4eec\u53ef\u4ee5\u4e3a\u65b9\u6cd5\u8bbe\u5b9a\u53c2\u6570\uff0c\u5728\u8c03\u7528\u65b9\u6cd5\u65f6\uff0c\u9700\u8981\u5916\u90e8\u4f20\u5165\u53c2\u6570\u624d\u53ef\u4ee5
    \/\/\u53c2\u6570\u7684\u5b9a\u4e49\u9700\u8981\u5728\u5c0f\u62ec\u53f7\u5185\u90e8\u7f16\u5199\uff0c\u7c7b\u4f3c\u4e8e\u53d8\u91cf\u5b9a\u4e49\uff0c\u9700\u8981\u586b\u5199 \u7c7b\u578b\u548c\u53c2\u6570\u540d\u79f0\uff0c\u591a\u4e2a\u53c2\u6570\u7528\u9017\u53f7\u9694\u5f00
    int sum(int a, int b){   \/\/\u8fd9\u91cc\u9700\u8981\u4e24\u4e2aint\u7c7b\u578b\u7684\u53c2\u6570\u8fdb\u884c\u8ba1\u7b97

    }<\/pre>\n\n\n\n
    \u90a3\u4e48\u73b0\u5728\u53c2\u6570\u4ece\u5916\u90e8\u4f20\u5165\u4e4b\u540e\uff0c\u6211\u4eec\u600e\u4e48\u4f7f\u7528\u5462\uff1f<\/p>\n\n\n\n
    int sum(int a, int b){   \/\/\u8fd9\u91cc\u7684\u53c2\u6570\uff0c\u76f8\u5f53\u4e8e\u6211\u4eec\u5728\u51fd\u6570\u4e2d\u5b9a\u4e49\u4e86\u4e24\u4e2a\u5c40\u90e8\u53d8\u91cf\uff0c\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u5728\u65b9\u6cd5\u4e2d\u4f7f\u7528
        int c = a + b;   \/\/\u76f4\u63a5c = a + b
    }<\/pre>\n\n\n\n
    \u90a3\u4e48\u73b0\u5728\u8ba1\u7b97\u5b8c\u6210\u4e86\uff0c\u6211\u4eec\u8be5\u600e\u4e48\u5c06\u7ed3\u679c\u4f20\u9012\u5230\u5916\u9762\u5462\uff1f\u9996\u5148\u51fd\u6570\u7684\u8fd4\u56de\u503c\u662fint\u7c7b\u578b\uff0c\u6211\u4eec\u53ea\u9700\u8981\u4f7f\u7528return<\/code>\u5173\u952e\u5b57\u6765\u8fd4\u56de\u4e00\u4e2aint\u7c7b\u578b\u7684\u7ed3\u679c\u5c31\u53ef\u4ee5\u4e86\uff1a<\/p>\n\n\n\n
    int sum(int a, int b){
        int c = a + b;
        return c;   \/\/return\u540e\u9762\u7d27\u8ddf\u9700\u8981\u8fd4\u56de\u7684\u7ed3\u679c\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u5c06\u8ba1\u7b97\u7ed3\u679c\u4e22\u51fa\u53bb\u4e86
      \t\/\/\u5e26\u8fd4\u56de\u503c\u7684\u65b9\u6cd5\uff0c\u662f\u4e00\u5b9a\u8981\u6709\u4e00\u4e2a\u8fd4\u56de\u7ed3\u679c\u7684\uff01\u5426\u5219\u65e0\u6cd5\u901a\u8fc7\u7f16\u8bd1\uff01
    }<\/pre>\n\n\n\n
    \u6211\u4eec\u6765\u6d4b\u8bd5\u4e00\u4e0b\u5427\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p = new Person();
        p.name = \"\u5c0f\u660e\";
        p.age = 18;
        int result = p.sum(10, 20);    \/\/\u73b0\u5728\u6211\u4eec\u8981\u8ba9\u8fd9\u4e2a\u5bf9\u8c61\u5e2e\u6211\u4eec\u8ba1\u7b9710 + 20\u7684\u7ed3\u679c
        System.out.println(result);    \/\/\u6210\u529f\u5f97\u523030\uff0c\u5b9e\u9645\u4e0a\u8fd9\u91cc\u7684println\u4e5f\u662f\u5728\u8c03\u7528\u65b9\u6cd5\u8fdb\u884c\u6253\u5370\u64cd\u4f5c
    }<\/pre>\n\n\n\n
    \u6ce8\u610f\uff1a<\/strong>\u65b9\u6cd5\u5b9a\u4e49\u65f6\u7f16\u5199\u7684\u53c2\u6570\uff0c\u6211\u4eec\u4e00\u822c\u79f0\u4e3a\u5f62\u5f0f\u53c2\u6570\uff0c\u800c\u8c03\u7528\u65b9\u6cd5\u5b9e\u9645\u4f20\u5165\u7684\u53c2\u6570\uff0c\u6211\u4eec\u6210\u4e3a\u5b9e\u9645\u53c2\u6570\u3002<\/p>\n\n\n\n
    \u662f\u4e0d\u662f\u8d8a\u6765\u8d8a\u611f\u89c9\u6211\u4eec\u771f\u7684\u5728\u8ddf\u4e00\u4e2a\u5bf9\u8c61\u8fdb\u884c\u4ea4\u4e92\uff1f\u53ea\u8981\u5404\u4f4d\u6709\u4e86\u8fd9\u6837\u7684\u4f53\u9a8c\uff0c\u57fa\u672c\u4e0a\u5c31\u5df2\u7ecf\u6478\u5230\u9762\u5411\u5bf9\u8c61\u7684\u95e8\u8def\u4e86\u3002<\/p>\n\n\n\n
    \u5173\u4e8ereturn<\/code>\u5173\u952e\u5b57\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u8fdb\u884c\u8fdb\u4e00\u6b65\u7684\u4ecb\u7ecd\u3002<\/p>\n\n\n\n
    \u5728\u6211\u4eec\u4f7f\u7528return<\/code>\u5173\u952e\u5b57\u4e4b\u540e\uff0c\u65b9\u6cd5\u5c31\u4f1a\u76f4\u63a5\u7ed3\u675f\u5e76\u8fd4\u56de\u7ed3\u679c\uff0c\u6240\u4ee5\u8bf4\u5728\u8fd9\u4e4b\u540e\u7f16\u5199\u7684\u4efb\u4f55\u4ee3\u7801\uff0c\u90fd\u662f\u4e0d\u53ef\u5230\u8fbe\u7684\uff1a<\/p>\n\n\n\n
    \"image-20220919222813469\"\/<\/div><\/figure>\n\n\n\n
    \u5728return<\/code>\u540e\u7f16\u5199\u4ee3\u7801\uff0c\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u4e0d\u901a\u8fc7\uff0c\u56e0\u4e3a\u5b58\u5728\u4e0d\u53ef\u8fbe\u8bed\u53e5\u3002<\/p>\n\n\n\n
    \u5982\u679c\u6211\u4eec\u7684\u7a0b\u5e8f\u4e2d\u51fa\u73b0\u4e86\u5206\u652f\u8bed\u53e5\uff0c\u90a3\u4e48\u5fc5\u987b\u4fdd\u8bc1\u6bcf\u4e00\u4e2a\u5206\u652f\u90fd\u6709\u8fd4\u56de\u503c\u624d\u53ef\u4ee5\uff1a<\/p>\n\n\n\n
    \"image-20220919223037197\"\/<\/div><\/figure>\n\n\n\n
    \u53ea\u8981\u6709\u4efb\u4f55\u4e00\u4e2a\u5206\u652f\u7f3a\u5c11\u4e86return<\/code>\u8bed\u53e5\uff0c\u90fd\u65e0\u6cd5\u6b63\u5e38\u901a\u8fc7\u7f16\u8bd1\uff0c\u603b\u4e4b\u5c31\u662f\u5fc5\u987b\u8003\u8651\u5230\u6240\u6709\u7684\u60c5\u51b5\uff0c\u4efb\u4f55\u60c5\u51b5\u4e0b\u90fd\u5fc5\u987b\u8981\u6709\u8fd4\u56de\u503c\u3002<\/p>\n\n\n\n
    \u5f53\u7136\uff0c\u5982\u679c\u65b9\u6cd5\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528return<\/code>\u8bed\u53e5\uff0c\u4e0d\u9700\u8981\u8ddf\u4e0a\u4efb\u4f55\u5185\u5bb9\uff0c\u53ea\u4e0d\u8fc7\u8fd9\u79cd\u60c5\u51b5\u4e0b\u4f7f\u7528\uff0c\u4ec5\u4ec5\u662f\u4e3a\u4e86\u5feb\u901f\u7ed3\u675f\u65b9\u6cd5\u7684\u6267\u884c\uff1a<\/p>\n\n\n\n
    void test(int a){
        if(a == 10) return;    \/\/\u5f53a\u7b49\u4e8e10\u65f6\u76f4\u63a5\u7ed3\u675f\u65b9\u6cd5\uff0c\u540e\u9762\u65e0\u8bba\u6709\u6ca1\u6709\u4ee3\u7801\u90fd\u4e0d\u4f1a\u6267\u884c\u4e86
        System.out.println(\"Hello World!\");   \/\/\u4e0d\u662f\u7684\u60c5\u51b5\u5c31\u6b63\u5e38\u6267\u884c
    }<\/pre>\n\n\n\n
    \u6700\u540e\u6211\u4eec\u6765\u8ba8\u8bba\u4e00\u4e0b\u53c2\u6570\u7684\u4f20\u9012\u95ee\u9898\uff1a<\/p>\n\n\n\n
    void test(int a){   \/\/\u6211\u4eec\u53ef\u4ee5\u8bbe\u7f6e\u53c2\u6570\u6765\u8ba9\u5916\u90e8\u7684\u6570\u636e\u4f20\u5165\u5230\u51fd\u6570\u5185\u90e8
        System.out.println(a);
    }<\/pre>\n\n\n\n
    \u5b9e\u9645\u4e0a\u53c2\u6570\u7684\u4f20\u9012\uff0c\u4f1a\u5728\u8c03\u7528\u65b9\u6cd5\u7684\u65f6\u5019\uff0c\u5bf9\u53c2\u6570\u7684\u503c\u8fdb\u884c\u590d\u5236\uff0c\u65b9\u6cd5\u4e2d\u7684\u53c2\u6570\u53d8\u91cf\uff0c\u4e0d\u662f\u6211\u4eec\u4f20\u5165\u7684\u53d8\u91cf\u672c\u8eab\uff0c\u6211\u4eec\u6765\u4e0b\u9762\u7684\u8fd9\u4e2a\u4f8b\u5b50\uff1a<\/p>\n\n\n\n
    void swap(int a, int b){   \/\/\u8fd9\u4e2a\u51fd\u6570\u7684\u76ee\u7684\u5f88\u660e\u663e\uff0c\u5c31\u662f\u4e3a\u4e86\u4ea4\u6362a\u548cb\u7684\u503c
        int tmp = a;
        a = b;
        b = a;
    }<\/pre>\n\n\n\n
    \u90a3\u4e48\u6211\u4eec\u6765\u6d4b\u8bd5\u4e00\u4e0b\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p = new Person();
        int a = 5, b = 9;   \/\/\u5916\u9762\u4e5f\u53eba\u548cb
        p.swap(a, b);
        System.out.println(\"a = \"+a+\", b = \"+b);   \/\/\u6700\u540e\u7684\u7ed3\u679c\u4f1a\u53d8\u6210\u4ec0\u4e48\u6837\u5b50\u5462\uff1f
    }<\/pre>\n\n\n\n
    \u6211\u4eec\u6765\u770b\u770b\u7ed3\u679c\u662f\u4ec0\u4e48\uff1a<\/p>\n\n\n\n
    \"image-20220919224219071\"\/<\/div><\/figure>\n\n\n\n
    \u6211\u4eec\u53d1\u73b0a\u548cb\u7684\u503c\u5e76\u6ca1\u6709\u53d1\u751f\u4ea4\u6362\uff0c\u4f46\u662f\u6309\u7167\u6211\u4eec\u7684\u65b9\u6cd5\u903b\u8f91\u6765\u8bf4\uff0c\u5e94\u8be5\u662f\u4f1a\u4ea4\u6362\u624d\u5bf9\uff0c\u8fd9\u662f\u4e3a\u4ec0\u4e48\u5462\uff1f\u5b9e\u9645\u4e0a\u8fd9\u91cc\u4ec5\u4ec5\u662f\u5c06\u503c\u590d\u5236\u7ed9\u4e86\u51fd\u6570\u91cc\u9762\u7684\u53d8\u91cf\u800c\u5df2\uff08\u76f8\u5f53\u4e8e\u662f\u53d8\u91cf\u7684\u8d4b\u503c\uff09<\/p>\n\n\n\n
    \"image-20220919224623727\"\/<\/div><\/figure>\n\n\n\n
    \u6240\u4ee5\u8bf4\u6211\u4eec\u4ea4\u6362\u7684\u4ec5\u4ec5\u662f\u65b9\u6cd5\u4e2d\u7684a\u548cb\uff0c\u53c2\u6570\u4f20\u9012\u4ec5\u4ec5\u662f\u503c\u4f20\u9012\uff0c\u6211\u4eec\u662f\u6ca1\u6709\u529e\u6cd5\u76f4\u63a5\u64cd\u4f5c\u5230\u5916\u9762\u7684a\u548cb\u7684\u3002<\/p>\n\n\n\n
    \u90a3\u4e48\u5404\u4f4d\u5c0f\u4f19\u4f34\u770b\u770b\u4e0b\u9762\u7684\u4f8b\u5b50\uff1a<\/p>\n\n\n\n
    void modify(Person person){
        person.name = \"lbwnb\";   \/\/\u4fee\u6539\u5bf9\u8c61\u7684\u540d\u79f0
    }<\/pre>\n\n\n\n
    public static void main(String[] args) {
        Person p = new Person();
        p.name = \"\u5c0f\u660e\";     \/\/\u5148\u5728\u5916\u9762\u4fee\u6539\u4e00\u6b21
        p.modify(p);        \/\/\u8c03\u7528\u65b9\u6cd5\u518d\u4fee\u6539\u4e00\u6b21
        System.out.println(p.name);    \/\/\u8bf7\u95ee\u6700\u540ename\u4f1a\u662f\u4ec0\u4e48\uff1f
    }<\/pre>\n\n\n\n
    \u6211\u4eec\u6765\u770b\u770b\u7ed3\u679c\uff1a<\/p>\n\n\n\n
    \"image-20220919224957971\"\/<\/div><\/figure>\n\n\n\n
    \u4e0d\u5bf9\u554a\uff0c\u524d\u9762\u4e0d\u662f\u8bf4\u53ea\u662f\u503c\u4f20\u9012\u5417\uff0c\u600e\u4e48\u8fd9\u91cc\u53c8\u53ef\u4ee5\u4fee\u6539\u6210\u529f\u5462\uff1f<\/p>\n\n\n\n
    \u786e\u5b9e\uff0c\u8fd9\u91cc\u540c\u6837\u662f\u8fdb\u884c\u7684\u503c\u4f20\u9012\uff0c\u53ea\u4e0d\u8fc7\u5404\u4f4d\u5c0f\u4f19\u4f34\u522b\u5fd8\u4e86\uff0c\u6211\u4eec\u524d\u9762\u53ef\u662f\u8bf4\u7684\u6e05\u6e05\u695a\u695a\uff0c\u5f15\u7528\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u4ec5\u4ec5\u5b58\u653e\u7684\u662f\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u800c\u4e0d\u662f\u5bf9\u8c61\u672c\u8eab\u3002\u90a3\u4e48\u8fd9\u91cc\u8fdb\u884c\u4e86\u503c\u4f20\u9012\uff0c\u76f8\u5f53\u4e8e\u5c06\u5bf9\u8c61\u7684\u5f15\u7528\u590d\u5236\u5230\u4e86\u65b9\u6cd5\u5185\u90e8\u7684\u53d8\u91cf\u4e2d\uff0c\u800c\u8fd9\u4e2a\u5185\u90e8\u7684\u53d8\u91cf\uff0c\u4f9d\u7136\u662f\u5f15\u7528\u7684\u540c\u4e00\u4e2a\u5bf9\u8c61\uff0c\u6240\u4ee5\u8bf4\u8fd9\u91cc\u5728\u65b9\u6cd5\u5185\u64cd\u4f5c\uff0c\u76f8\u5f53\u4e8e\u76f4\u63a5\u64cd\u4f5c\u5916\u9762\u7684\u5b9a\u4e49\u5bf9\u8c61\u3002<\/p>\n\n\n\n
    \"image-20220919225455752\"\/<\/div><\/figure>\n\n\n\n
    \u65b9\u6cd5\u8fdb\u9636\u4f7f\u7528<\/h3>\n\n\n\n
    \u6709\u65f6\u5019\u6211\u4eec\u7684\u65b9\u6cd5\u4e2d\u53ef\u80fd\u4f1a\u51fa\u73b0\u4e00\u4e9b\u4e0e\u6210\u5458\u53d8\u91cf\u91cd\u540d\u7684\u53d8\u91cf\uff1a<\/p>\n\n\n\n
    \/\/\u6211\u4eec\u5e0c\u671b\u4f7f\u7528\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u6765\u4e3a\u5f53\u524d\u5bf9\u8c61\u8bbe\u5b9a\u540d\u5b57
    void setName(String name) {
       
    }<\/pre>\n\n\n\n
    \u6b64\u65f6\u7c7b\u4e2d\u5b9a\u4e49\u7684\u53d8\u91cf\u540d\u79f0\u4e5f\u662fname<\/code>\uff0c\u90a3\u4e48\u6211\u4eec\u662f\u5426\u53ef\u4ee5\u8fd9\u6837\u7f16\u5199\u5462\uff1a<\/p>\n\n\n\n
    void setName(String name) {
        name = name;    \/\/\u51fa\u73b0\u91cd\u540d\u65f6\uff0c\u4f18\u5148\u4f7f\u7528\u4f5c\u7528\u57df\u6700\u63a5\u8fd1\u7684\uff0c\u8fd9\u91cc\u5b9e\u9645\u4e0a\u662f\u5c06\u65b9\u6cd5\u53c2\u6570\u7684\u5c40\u90e8\u53d8\u91cfname\u8d4b\u503c\u4e3a\u672c\u8eab
    }<\/pre>\n\n\n\n
    \u6211\u4eec\u6765\u6d4b\u8bd5\u4e00\u4e0b\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p = new Person();
        p.setName(\"\u5c0f\u660e\");
        System.out.println(p.name);
    }<\/pre>\n\n\n\n
    \u6211\u4eec\u53d1\u73b0\uff0c\u4f3c\u4e4e\u8fd9\u6837\u505a\u5e76\u6ca1\u6709\u4efb\u4f55\u7684\u6548\u679c\uff0cname\u4f9d\u7136\u662f\u6ca1\u6709\u4fee\u6539\u7684\u72b6\u6001\u3002\u90a3\u4e48\u5f53\u51fa\u73b0\u91cd\u540d\u7684\u65f6\u5019\uff0c\u56e0\u4e3a\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4f1a\u4f18\u5148\u4f7f\u7528\u4f5c\u7528\u57df\u6700\u8fd1\u7684\u53d8\u91cf\uff0c\u6211\u4eec\u600e\u4e48\u624d\u80fd\u8868\u793a\u8981\u4f7f\u7528\u7684\u53d8\u91cf\u662f\u7c7b\u7684\u6210\u5458\u53d8\u91cf\u5462\uff1f<\/p>\n\n\n\n
    Person p = new Person();
    p.name = \"\u5c0f\u660e\";    \/\/\u6211\u4eec\u4e4b\u524d\u5728\u5916\u9762\u4f7f\u7528\u65f6\uff0c\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7\u5bf9\u8c61.\u5c5e\u6027\u7684\u5f62\u5f0f\u8bbf\u95ee\u5230<\/pre>\n\n\n\n
    \u540c\u6837\u7684\uff0c\u6211\u4eec\u5982\u679c\u60f3\u8981\u5728\u65b9\u6cd5\u4e2d\u8bbf\u95ee\u5230\u5f53\u524d\u5bf9\u8c61\u7684\u5c5e\u6027\uff0c\u90a3\u4e48\u53ef\u4ee5\u4f7f\u7528this<\/code>\u5173\u952e\u5b57\uff0c\u6765\u660e\u786e\u8868\u793a\u5f53\u524d\u7c7b\u7684\u793a\u4f8b\u5bf9\u8c61\u672c\u8eab\uff1a<\/p>\n\n\n\n
    void setName(String name) {
        this.name = name;   \/\/\u8ba9\u5f53\u524d\u5bf9\u8c61\u7684name\u53d8\u91cf\u503c\u7b49\u4e8e\u53c2\u6570\u4f20\u5165\u7684\u503c
    }<\/pre>\n\n\n\n
    \u8fd9\u6837\u5c31\u53ef\u4ee5\u4fee\u6539\u6210\u529f\u4e86\uff0c\u5f53\u7136\uff0c\u5982\u679c\u65b9\u6cd5\u5185\u6ca1\u6709\u53d8\u91cf\u51fa\u73b0\u91cd\u540d\u7684\u60c5\u51b5\uff0c\u90a3\u4e48\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u53ef\u4ee5\u4e0d\u4f7f\u7528this<\/code>\u5173\u952e\u5b57\u6765\u660e\u786e\u8868\u793a\u5f53\u524d\u5bf9\u8c61\uff1a<\/p>\n\n\n\n
    String getName() {
        return name;    \/\/\u8fd9\u91cc\u6ca1\u6709\u4f7f\u7528this\uff0c\u4f46\u662f\u5f53\u524d\u4f5c\u7528\u57df\u4e0b\u53ea\u6709\u5bf9\u8c61\u5c5e\u6027\u7684name\u53d8\u91cf\uff0c\u6240\u4ee5\u8bf4\u76f4\u63a5\u5c31\u4f7f\u7528\u4e86
    }<\/pre>\n\n\n\n
    \u6211\u4eec\u63a5\u7740\u6765\u770b\u65b9\u6cd5\u7684\u91cd\u8f7d\u3002<\/p>\n\n\n\n
    \u6709\u4e9b\u65f6\u5019\uff0c\u53c2\u6570\u7c7b\u578b\u53ef\u80fd\u4f1a\u591a\u79cd\u591a\u6837\uff0c\u6211\u4eec\u7684\u65b9\u6cd5\u9700\u8981\u80fd\u591f\u540c\u65f6\u5e94\u5bf9\u591a\u79cd\u60c5\u51b5\uff1a<\/p>\n\n\n\n
    int sum(int a, int b){
        return a + b;
    }<\/pre>\n\n\n\n
    public static void main(String[] args) {
        Person p = new Person();
        System.out.println(p.sum(10, 20));    \/\/\u8fd9\u91cc\u53ef\u4ee5\u6b63\u5e38\u8ba1\u7b97\u4e24\u4e2a\u6574\u6570\u7684\u548c
    }<\/pre>\n\n\n\n
    \u4f46\u662f\u8981\u662f\u6211\u4eec\u73b0\u5728\u4e0d\u4ec5\u8981\u8ba9\u4eba\u7c7b\u4f1a\u8ba1\u7b97\u6574\u6570\uff0c\u8fd8\u8981\u4f1a\u8ba1\u7b97\u5c0f\u6570\u5462\uff1f<\/p>\n\n\n\n
    \"image-20220920102347110\"\/<\/div><\/figure>\n\n\n\n
    \u5f53\u6211\u4eec\u4f7f\u7528\u5c0f\u6570\u65f6\uff0c\u53ef\u4ee5\u770b\u5230\uff0c\u53c2\u6570\u8981\u6c42\u7684\u662fint\u7c7b\u578b\uff0c\u90a3\u4e48\u80af\u5b9a\u4f1a\u51fa\u73b0\u9519\u8bef\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u53ea\u80fd\u7528\u4e8e\u8ba1\u7b97\u6574\u6570\u3002\u6b64\u65f6\uff0c\u4e3a\u4e86\u8ba9\u8fd9\u4e2a\u65b9\u6cd5\u652f\u6301\u4f7f\u7528\u5c0f\u6570\u8fdb\u884c\u8ba1\u7b97\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u8fd9\u4e2a\u65b9\u6cd5\u8fdb\u884c\u91cd\u8f7d\u3002<\/p>\n\n\n\n
    \u4e00\u4e2a\u7c7b\u4e2d\u53ef\u4ee5\u5305\u542b\u591a\u4e2a\u540c\u540d\u7684\u65b9\u6cd5\uff0c\u4f46\u662f\u9700\u8981\u7684\u5f62\u5f0f\u53c2\u6570\u4e0d\u4e00\u6837\uff0c\u65b9\u6cd5\u7684\u8fd4\u56de\u7c7b\u578b\uff0c\u53ef\u4ee5\u76f8\u540c\uff0c\u4e5f\u53ef\u4ee5\u4e0d\u540c\uff0c\u4f46\u662f\u4ec5\u8fd4\u56de\u7c7b\u578b\u4e0d\u540c\uff0c\u662f\u4e0d\u5141\u8bb8\u7684\uff01<\/p>\n\n\n\n
    int sum(int a, int b){
        return a + b;
    }

    double sum(double a, double b){    \/\/\u4e3a\u4e86\u652f\u6301\u5c0f\u6570\u52a0\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u8fdb\u884c\u4e00\u6b21\u91cd\u8f7d
        return a + b;
    }<\/pre>\n\n\n\n
    \u8fd9\u6837\u5c31\u53ef\u4ee5\u6b63\u5e38\u4f7f\u7528\u4e86\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p = new Person();
      \t\/\/\u5f53\u65b9\u6cd5\u51fa\u73b0\u591a\u4e2a\u91cd\u8f7d\u7684\u60c5\u51b5\uff0c\u5728\u8c03\u7528\u65f6\u4f1a\u81ea\u52a8\u8fdb\u884c\u5339\u914d\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u8fdb\u884c\u8c03\u7528
        System.out.println(p.sum(1.5, 2.2));
    }<\/pre>\n\n\n\n
    \u5305\u62ec\u6211\u4eec\u4e4b\u524d\u4e00\u76f4\u5728\u4f7f\u7528\u7684println<\/code>\u65b9\u6cd5\uff0c\u5176\u5b9e\u4e5f\u662f\u91cd\u8f7d\u4e86\u5f88\u591a\u6b21\u7684\uff0c\u56e0\u4e3a\u8981\u652f\u6301\u5404\u79cd\u503c\u7684\u6253\u5370\u3002<\/p>\n\n\n\n
    \u6ce8\u610f\uff0c\u5982\u679c\u4ec5\u4ec5\u662f\u8fd4\u56de\u503c\u7684\u4e0d\u540c\uff0c\u662f\u4e0d\u652f\u6301\u91cd\u8f7d\u7684\uff1a<\/p>\n\n\n\n
    \"image-20220920102933047\"\/<\/div><\/figure>\n\n\n\n
    \u5f53\u7136\uff0c\u65b9\u6cd5\u4e4b\u95f4\u662f\u53ef\u4ee5\u76f8\u4e92\u8c03\u7528\u7684\uff1a<\/p>\n\n\n\n
    void test(){
        System.out.println(\"\u6211\u662ftest\");   \/\/\u5b9e\u9645\u4e0a\u8fd9\u91cc\u4e5f\u662f\u8c03\u7528\u53e6\u4e00\u4e2a\u65b9\u6cd5
    }
    \u200b
    void say(){
        test();   \/\/\u5728\u4e00\u4e2a\u65b9\u6cd5\u5185\u8c03\u7528\u53e6\u4e00\u4e2a\u65b9\u6cd5
    }<\/pre>\n\n\n\n
    \u5982\u679c\u6211\u4eec\u8fd9\u6837\u5199\u7684\u8bdd\uff1a<\/p>\n\n\n\n
    void test(){
        say();
    }
    \u200b
    void say(){
        test();
    }<\/pre>\n\n\n\n
    \u5404\u4f4d\u731c\u731c\u770b\u4f1a\u51fa\u73b0\u4ec0\u4e48\u60c5\u51b5\uff1f<\/p>\n\n\n\n
    \"image-20220921001914601\"\/<\/div><\/figure>\n\n\n\n
    \u6b64\u65f6\u53c8\u51fa\u73b0\u4e86\u4e00\u4e2a\u6211\u4eec\u4e0d\u8ba4\u8bc6\u7684\u5f02\u5e38\uff0c\u5b9e\u9645\u4e0a\u4ec0\u4e48\u539f\u56e0\u5bfc\u81f4\u7684\u6211\u4eec\u81ea\u5df1\u90fd\u5f88\u6e05\u695a\uff0c\u65b9\u6cd5\u4e4b\u95f4\u4e00\u76f4\u5728\u76f8\u4e92\u8c03\u7528\uff0c\u6ca1\u6709\u4e00\u4e2a\u51fa\u53e3\u3002<\/p>\n\n\n\n
    \u65b9\u6cd5\u81ea\u5df1\u4e5f\u53ef\u4ee5\u8c03\u7528\u81ea\u5df1\uff1a<\/p>\n\n\n\n
    void test(){
        test();
    }<\/pre>\n\n\n\n
    \u50cf\u8fd9\u6837\u81ea\u5df1\u8c03\u7528\u81ea\u5df1\u7684\u884c\u4e3a\uff0c\u6211\u4eec\u79f0\u4e3a\u9012\u5f52\u8c03\u7528\uff0c\u5982\u679c\u76f4\u63a5\u8fd9\u6837\u7f16\u5199\uff0c\u4f1a\u8ddf\u4e0a\u9762\u4e00\u6837\uff0c\u51fa\u73b0\u6808\u6ea2\u51fa\u9519\u8bef\u3002\u4f46\u662f\u5982\u679c\u6211\u4eec\u7ed9\u5176\u5408\u7406\u5730\u8bbe\u7f6e\u51fa\u53e3\uff0c\u5c31\u4e0d\u4f1a\u51fa\u73b0\u8fd9\u79cd\u95ee\u9898\uff0c\u6bd4\u5982\u6211\u4eec\u60f3\u8981\u8ba1\u7b97\u4ece1\u52a0\u5230n\u7684\u548c\uff1a<\/p>\n\n\n\n
    int test(int n){
        if(n == 0) return 0;
        return test(n - 1) + n;    \/\/\u8fd4\u56de\u7684\u7ed3\u679c\u662f\u4e0b\u4e00\u5c42\u8fd4\u56de\u7684\u7ed3\u679c+\u5f53\u524d\u8fd9\u4e00\u5c42\u7684n
    }<\/pre>\n\n\n\n
    \u662f\u4e0d\u662f\u611f\u89c9\u5f88\u5de7\u5999\uff1f\u5b9e\u9645\u4e0a\u9012\u5f52\u8c03\u7528\u5728\u5f88\u591a\u60c5\u51b5\u4e0b\u80fd\u591f\u5feb\u901f\u89e3\u51b3\u4e00\u4e9b\u5f88\u9ebb\u70e6\u7684\u95ee\u9898\uff0c\u6211\u4eec\u4f1a\u5728\u540e\u9762\u7ee7\u7eed\u4e86\u89e3\u3002<\/p>\n\n\n\n
    \u6784\u9020\u65b9\u6cd5<\/h3>\n\n\n\n
    \u6211\u4eec\u63a5\u7740\u6765\u770b\u4e00\u79cd\u6bd4\u8f83\u7279\u6b8a\u7684\u65b9\u6cd5\uff0c\u6784\u9020\u65b9\u6cd5\u3002<\/p>\n\n\n\n
    \u6211\u4eec\u524d\u9762\u521b\u5efa\u5bf9\u8c61\uff0c\u90fd\u662f\u76f4\u63a5\u4f7f\u7528new<\/code>\u5173\u952e\u5b57\u5c31\u80fd\u76f4\u63a5\u641e\u5b9a\u4e86\uff0c\u4f46\u662f\u6211\u4eec\u53d1\u73b0\uff0c\u5bf9\u8c61\u5728\u521b\u5efa\u4e4b\u540e\uff0c\u5404\u79cd\u5c5e\u6027\u90fd\u662f\u9ed8\u8ba4\u503c\uff0c\u90a3\u4e48\u80fd\u5426\u5b9e\u73b0\u5728\u5bf9\u8c61\u521b\u5efa\u65f6\u5c31\u4e3a\u5176\u6307\u5b9a\u540d\u5b57\u3001\u5e74\u9f84\u3001\u6027\u522b\u5462\uff1f\u8981\u5728\u5bf9\u8c61\u521b\u5efa\u65f6\u8fdb\u884c\u5904\u7406\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u6784\u9020\u65b9\u6cd5\uff08\u6784\u9020\u5668\uff09\u6765\u5b8c\u6210\u3002<\/p>\n\n\n\n
    \u5b9e\u9645\u4e0a\u6bcf\u4e2a\u7c7b\u90fd\u6709\u4e00\u4e2a\u9ed8\u8ba4\u7684\u6784\u9020\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u6765\u770b\u770b\u53cd\u7f16\u8bd1\u7684\u7ed3\u679c\uff1a<\/p>\n\n\n\n
    public class Person {
        String name;
        int age;
        String sex;

        public Person() {    \/\/\u53cd\u7f16\u8bd1\u4e2d\uff0c\u591a\u51fa\u6765\u4e86\u8fd9\u6837\u4e00\u4e2a\u65b9\u6cd5\uff0c\u8fd9\u5176\u5b9e\u5c31\u662f\u6784\u9020\u65b9\u6cd5
        }
    }<\/pre>\n\n\n\n
    \u6784\u9020\u65b9\u6cd5\u4e0d\u9700\u8981\u586b\u5199\u8fd4\u56de\u503c\uff0c\u5e76\u4e14\u65b9\u6cd5\u540d\u79f0\u4e0e\u7c7b\u540d\u76f8\u540c\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u6bcf\u4e2a\u7c7b\u90fd\u4f1a\u81ea\u5e26\u4e00\u4e2a\u6ca1\u6709\u4efb\u4f55\u53c2\u6570\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\uff08\u53ea\u662f\u4e0d\u7528\u6211\u4eec\u53bb\u5199\uff0c\u7f16\u8bd1\u51fa\u6765\u5c31\u81ea\u5e26\uff09\u5f53\u7136\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u624b\u52a8\u58f0\u660e\uff0c\u5bf9\u5176\u8fdb\u884c\u4fee\u6539\uff1a<\/p>\n\n\n\n
    public class Person {
        String name;
        int age;
        String sex;

        Person(){    \/\/\u6784\u9020\u65b9\u6cd5\u4e0d\u9700\u8981\u6307\u5b9a\u8fd4\u56de\u503c\uff0c\u5e76\u4e14\u65b9\u6cd5\u540d\u79f0\u4e0e\u7c7b\u540d\u76f8\u540c
            name = \"\u5c0f\u660e\";   \/\/\u6784\u9020\u65b9\u6cd5\u4f1a\u5728\u5bf9\u8c61\u521b\u5efa\u65f6\u6267\u884c\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u5404\u79cd\u9700\u8981\u521d\u59cb\u5316\u7684\u64cd\u4f5c\u90fd\u5728\u8fd9\u91cc\u8fdb\u884c\u5904\u7406
            age = 18;
            sex = \"\u7537\";
        }
    }<\/pre>\n\n\n\n
    \u6784\u9020\u65b9\u6cd5\u4f1a\u5728new\u7684\u65f6\u5019\u81ea\u52a8\u6267\u884c\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p = new Person();   \/\/\u8fd9\u91cc\u7684new Person()\u5176\u5b9e\u5c31\u662f\u5728\u8c03\u7528\u65e0\u53c2\u6784\u9020\u65b9\u6cd5
        System.out.println(p.name);
    }<\/pre>\n\n\n\n
    \u5f53\u7136\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u4e3a\u6784\u9020\u65b9\u6cd5\u8bbe\u5b9a\u53c2\u6570\uff1a<\/p>\n\n\n\n
    public class Person {
        String name;
        int age;
        String sex;

        Person(String name, int age, String sex){   \/\/\u8ddf\u666e\u901a\u65b9\u6cd5\u662f\u4e00\u6837\u7684
            this.name = name;
            this.age = age;
            this.sex = sex;
        }
    }<\/pre>\n\n\n\n
    \u6ce8\u610f\uff0c\u5728\u6211\u4eec\u81ea\u5df1\u5b9a\u4e49\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\u4e4b\u540e\uff0c\u4f1a\u8986\u76d6\u6389\u9ed8\u8ba4\u7684\u90a3\u4e00\u4e2a\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\uff0c\u9664\u975e\u6211\u4eec\u624b\u52a8\u91cd\u8f7d\u4e00\u4e2a\u65e0\u53c2\u6784\u9020\uff0c\u5426\u5219\u8981\u521b\u5efa\u8fd9\u4e2a\u7c7b\u7684\u5bf9\u8c61\uff0c\u5fc5\u987b\u8c03\u7528\u6211\u4eec\u81ea\u5df1\u5b9a\u4e49\u7684\u6784\u9020\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p = new Person(\"\u5c0f\u660e\", 18, \"\u7537\");   \/\/\u8c03\u7528\u81ea\u5df1\u5b9a\u4e49\u7684\u5e26\u4e09\u4e2a\u53c2\u6570\u7684\u6784\u9020\u65b9\u6cd5
        System.out.println(p.name);
    }<\/pre>\n\n\n\n
    \u6211\u4eec\u53ef\u4ee5\u53bb\u770b\u770b\u53cd\u7f16\u8bd1\u7684\u7ed3\u679c\uff0c\u4f1a\u53d1\u73b0\u6b64\u65f6\u6ca1\u6709\u65e0\u53c2\u6784\u9020\u4e86\uff0c\u800c\u662f\u53ea\u5269\u4e0b\u6211\u4eec\u81ea\u5df1\u7f16\u5199\u7684\u3002<\/p>\n\n\n\n
    \u5f53\u7136\uff0c\u8981\u7ed9\u6210\u5458\u53d8\u91cf\u8bbe\u5b9a\u521d\u59cb\u503c\uff0c\u6211\u4eec\u4e0d\u4ec5\u53ef\u4ee5\u901a\u8fc7\u6784\u9020\u65b9\u6cd5\uff0c\u4e5f\u53ef\u4ee5\u76f4\u63a5\u5728\u5b9a\u4e49\u65f6\u8d4b\u503c\uff1a<\/p>\n\n\n\n
    public class Person {
        String name = \"\u672a\u77e5\";   \/\/\u76f4\u63a5\u8d4b\u503c\uff0c\u90a3\u4e48\u5bf9\u8c61\u6784\u9020\u597d\u4e4b\u540e\uff0c\u5c5e\u6027\u9ed8\u8ba4\u5c31\u662f\u8fd9\u4e2a\u503c
        int age = 10;
        String sex = \"\u7537\";
    }<\/pre>\n\n\n\n
    \u8fd9\u91cc\u9700\u8981\u7279\u522b\u6ce8\u610f\uff0c\u6210\u5458\u53d8\u91cf\u7684\u521d\u59cb\u5316\uff0c\u5e76\u4e0d\u662f\u5728\u6784\u9020\u65b9\u6cd5\u4e4b\u524d\u4e4b\u540e\uff0c\u800c\u662f\u5728\u8fd9\u4e4b\u524d\u5c31\u5df2\u7ecf\u5b8c\u6210\u4e86\uff1a<\/p>\n\n\n\n
    Person(String name, int age, String sex){
        System.out.println(age);    \/\/\u5728\u8d4b\u503c\u4e4b\u524d\u770b\u770b\u662f\u5426\u6709\u521d\u59cb\u503c
        this.name = name;
        this.age = age;
        this.sex = sex;
    }<\/pre>\n\n\n\n
    \u6211\u4eec\u4e5f\u53ef\u4ee5\u5728\u7c7b\u4e2d\u6dfb\u52a0\u4ee3\u7801\u5757\uff0c\u4ee3\u7801\u5757\u540c\u6837\u4f1a\u5728\u5bf9\u8c61\u6784\u9020\u4e4b\u524d\u8fdb\u884c\uff0c\u5728\u6210\u5458\u53d8\u91cf\u521d\u59cb\u5316\u4e4b\u540e\u6267\u884c\uff1a<\/p>\n\n\n\n
    public class Person {
        String name;
        int age;
        String sex;

        {
            System.out.println(\"\u6211\u662f\u4ee3\u7801\u5757\");   \/\/\u4ee3\u7801\u5757\u4e2d\u7684\u5185\u5bb9\u4f1a\u5728\u5bf9\u8c61\u521b\u5efa\u65f6\u4ec5\u6267\u884c\u4e00\u6b21
        }

        Person(String name, int age, String sex){
            System.out.println(\"\u6211\u88ab\u6784\u9020\u4e86\");
            this.name = name;
            this.age = age;
            this.sex = sex;
        }
    }<\/pre>\n\n\n\n
    \u53ea\u4e0d\u8fc7\u4e00\u822c\u60c5\u51b5\u4e0b\u4f7f\u7528\u4ee3\u7801\u5757\u7684\u9891\u7387\u6bd4\u8f83\u4f4e\uff0c\u6807\u51c6\u60c5\u51b5\u4e0b\u8fd8\u662f\u901a\u8fc7\u6784\u9020\u65b9\u6cd5\u8fdb\u884c\u8fdb\u884c\u5bf9\u8c61\u521d\u59cb\u5316\u5de5\u4f5c\uff0c\u6240\u4ee5\u8bf4\u8fd9\u91cc\u505a\u4e86\u89e3\u5c31\u884c\u4e86\u3002<\/p>\n\n\n\n
    \u9759\u6001\u53d8\u91cf\u548c\u9759\u6001\u65b9\u6cd5<\/h3>\n\n\n\n
    \u524d\u9762\u6211\u4eec\u5df2\u7ecf\u4e86\u89e3\u4e86\u7c7b\u7684\u5927\u90e8\u5206\u7279\u6027\uff0c\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u5177\u6709\u591a\u79cd\u5c5e\u6027\u3001\u884c\u4e3a\uff0c\u5305\u62ec\u5bf9\u8c61\u8be5\u5982\u4f55\u521b\u5efa\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u6784\u9020\u65b9\u6cd5\u8fdb\u884c\u8bbe\u5b9a\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u7c7b\u521b\u5efa\u5bf9\u8c61\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u4f1a\u5177\u6709\u6211\u4eec\u5728\u7c7b\u4e2d\u8bbe\u5b9a\u597d\u7684\u5c5e\u6027\uff0c\u5305\u62ec\u6211\u4eec\u8bbe\u5b9a\u597d\u7684\u884c\u4e3a\uff0c\u6240\u4ee5\u8bf4\u7c7b\u5c31\u50cf\u662f\u4e00\u4e2a\u6a21\u677f\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e2a\u6a21\u677f\u5feb\u901f\u634f\u9020\u51fa\u4e00\u4e2a\u53c8\u4e00\u4e2a\u7684\u5bf9\u8c61\u3002\u6211\u4eec\u63a5\u7740\u6765\u770b\u6bd4\u8f83\u7279\u6b8a\u7684\u9759\u6001\u7279\u6027\u3002<\/p>\n\n\n\n
    \u9759\u6001\u7684\u5185\u5bb9\uff0c\u6211\u4eec\u53ef\u4ee5\u7406\u89e3\u4e3a\u662f\u5c5e\u4e8e\u8fd9\u4e2a\u7c7b\u7684\uff0c\u4e5f\u53ef\u4ee5\u7406\u89e3\u4e3a\u662f\u6240\u6709\u5bf9\u8c61\u5171\u4eab\u7684\u5185\u5bb9\u3002\u6211\u4eec\u901a\u8fc7\u4f7f\u7528static<\/code>\u5173\u952e\u5b57\u6765\u58f0\u660e\u4e00\u4e2a\u53d8\u91cf\u6216\u4e00\u4e2a\u65b9\u6cd5\u4e3a\u9759\u6001\u7684\uff0c\u4e00\u65e6\u88ab\u58f0\u660e\u4e3a\u9759\u6001\uff0c\u90a3\u4e48\u901a\u8fc7\u8fd9\u4e2a\u7c7b\u521b\u5efa\u7684\u6240\u6709\u5bf9\u8c61\uff0c\u64cd\u4f5c\u7684\u90fd\u662f\u540c\u4e00\u4e2a\u76ee\u6807\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5bf9\u8c61\u518d\u591a\uff0c\u4e5f\u53ea\u6709\u8fd9\u4e00\u4e2a\u9759\u6001\u7684\u53d8\u91cf\u6216\u65b9\u6cd5\u3002\u4e00\u4e2a\u5bf9\u8c61\u6539\u53d8\u4e86\u9759\u6001\u53d8\u91cf\u7684\u503c\uff0c\u90a3\u4e48\u5176\u4ed6\u7684\u5bf9\u8c61\u8bfb\u53d6\u7684\u5c31\u662f\u88ab\u6539\u53d8\u7684\u503c\u3002<\/p>\n\n\n\n
    public class Person {
        String name;
        int age;
        String sex;
        static String info;    \/\/\u8fd9\u91cc\u6211\u4eec\u5b9a\u4e49\u4e00\u4e2ainfo\u9759\u6001\u53d8\u91cf
    }<\/pre>\n\n\n\n
    \u6211\u4eec\u6765\u6d4b\u8bd5\u4e00\u4e0b\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person p1 = new Person();
        Person p2 = new Person();
        p1.info = \"\u6770\u54e5\u4f60\u5e72\u561b\";
        System.out.println(p2.info);   \/\/\u53ef\u4ee5\u770b\u5230\uff0c\u7531\u4e8e\u9759\u6001\u5c5e\u6027\u662f\u5c5e\u4e8e\u7c7b\u7684\uff0c\u56e0\u6b64\u65e0\u8bba\u901a\u8fc7\u4ec0\u4e48\u65b9\u5f0f\u6539\u53d8\uff0c\u90fd\u6539\u53d8\u7684\u662f\u540c\u4e00\u4e2a\u76ee\u6807
    }<\/pre>\n\n\n\n
    \u6240\u4ee5\u8bf4\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u5e76\u4e0d\u4f1a\u901a\u8fc7\u4e00\u4e2a\u5177\u4f53\u7684\u5bf9\u8c61\u53bb\u4fee\u6539\u548c\u4f7f\u7528\u9759\u6001\u5c5e\u6027\uff0c\u800c\u662f\u901a\u8fc7\u8fd9\u4e2a\u7c7b\u53bb\u4f7f\u7528\uff1a<\/p>\n\n\n\n
    public static void main(String[] args) {
        Person.info = \"\u8ba9\u6211\u770b\u770b\";
        System.out.println(Person.info);
    }<\/pre>\n\n\n\n
    \u540c\u6837\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u65b9\u6cd5\u6807\u8bb0\u4e3a\u9759\u6001\uff1a<\/p>\n\n\n\n
    static void test(){
        System.out.println(\"\u6211\u662f\u9759\u6001\u65b9\u6cd5\");
    }<\/pre>\n\n\n\n
    \u9759\u6001\u65b9\u6cd5\u540c\u6837\u662f\u5c5e\u4e8e\u7c7b\u7684\uff0c\u800c\u4e0d\u662f\u5177\u4f53\u7684\u67d0\u4e2a\u5bf9\u8c61\uff0c\u6240\u4ee5\u8bf4\uff0c\u5c31\u50cf\u4e0b\u9762\u8fd9\u6837\uff1a<\/p>\n\n\n\n
    \"image-20220920234401275\"\/<\/div><\/figure>\n\n\n\n
    \u56e0\u4e3a\u9759\u6001\u65b9\u6cd5\u5c5e\u4e8e\u7c7b\u7684\uff0c\u6240\u4ee5\u8bf4\u6211\u4eec\u5728\u9759\u6001\u65b9\u6cd5\u4e2d\uff0c\u65e0\u6cd5\u83b7\u53d6\u6210\u5458\u53d8\u91cf\u7684\u503c\uff1a<\/p>\n\n\n\n
    \"image-20220920235418115\"\/<\/div><\/figure>\n\n\n\n
    \u6210\u5458\u53d8\u91cf\u662f\u67d0\u4e2a\u5177\u4f53\u5bf9\u8c61\u62e5\u6709\u7684\u5c5e\u6027\uff0c\u5c31\u50cf\u5c0f\u660e\u8fd9\u4e2a\u5177\u4f53\u7684\u4eba\u7684\u540d\u5b57\u624d\u53eb\u5c0f\u660e\uff0c\u800c\u9759\u6001\u65b9\u6cd5\u662f\u7c7b\u5177\u6709\u7684\uff0c\u5e76\u4e0d\u662f\u5177\u4f53\u5bf9\u8c61\u7684\uff0c\u80af\u5b9a\u662f\u6ca1\u529e\u6cd5\u8bbf\u95ee\u5230\u7684\u3002\u540c\u6837\u7684\uff0c\u5728\u9759\u6001\u65b9\u6cd5\u4e2d\uff0c\u65e0\u6cd5\u4f7f\u7528this<\/code>\u5173\u952e\u5b57\uff0c\u56e0\u4e3athis\u5173\u952e\u5b57\u4ee3\u8868\u7684\u662f\u5f53\u524d\u7684\u5bf9\u8c61\u672c\u8eab\u3002<\/p>\n\n\n\n
    \u4f46\u662f\u9759\u6001\u65b9\u6cd5\u662f\u53ef\u4ee5\u8bbf\u95ee\u5230\u9759\u6001\u53d8\u91cf\u7684\uff1a<\/p>\n\n\n\n
    static String info;

    static void test(){
        System.out.println(\"\u9759\u6001\u53d8\u91cf\u7684\u503c\u4e3a\uff1a\"+info);
    }<\/pre>\n\n\n\n
    \u56e0\u4e3a\u4ed6\u4eec\u90fd\u5c5e\u4e8e\u7c7b\uff0c\u6240\u4ee5\u8bf4\u80af\u5b9a\u662f\u53ef\u4ee5\u8bbf\u95ee\u5230\u7684\u3002<\/p>\n\n\n\n
    \u6211\u4eec\u4e5f\u53ef\u4ee5\u5c06\u4ee3\u7801\u5757\u53d8\u6210\u9759\u6001\u7684\uff1a<\/p>\n\n\n\n
    static String info;
    \u200b
    static {   \/\/\u9759\u6001\u4ee3\u7801\u5757\u53ef\u4ee5\u7528\u4e8e\u521d\u59cb\u5316\u9759\u6001\u53d8\u91cf
        info = \"\u6d4b\u8bd5\";
    }<\/pre>\n\n\n\n
    \u90a3\u4e48\uff0c\u9759\u6001\u53d8\u91cf\uff0c\u662f\u5728\u4ec0\u4e48\u65f6\u5019\u8fdb\u884c\u521d\u59cb\u5316\u7684\u5462\uff1f<\/p>\n\n\n\n
    \u6211\u4eec\u5728\u4e00\u5f00\u59cb\u4ecb\u7ecd\u4e86\uff0c\u6211\u4eec\u5b9e\u9645\u4e0a\u662f\u5c06.class<\/code>\u6587\u4ef6\u4e22\u7ed9JVM\u53bb\u6267\u884c\u7684\uff0c\u800c\u6bcf\u4e00\u4e2a.class<\/code>\u6587\u4ef6\u5176\u5b9e\u5c31\u662f\u6211\u4eec\u7f16\u5199\u7684\u4e00\u4e2a\u7c7b\uff0c\u6211\u4eec\u5728Java\u4e2d\u4f7f\u7528\u4e00\u4e2a\u7c7b\u4e4b\u524d\uff0cJVM\u5e76\u4e0d\u4f1a\u5728\u4e00\u5f00\u59cb\u5c31\u53bb\u52a0\u8f7d\u5b83\uff0c\u800c\u662f\u5728\u9700\u8981\u65f6\u624d\u4f1a\u53bb\u52a0\u8f7d\uff08\u4f18\u5316\uff09\u4e00\u822c\u9047\u5230\u4ee5\u4e0b\u60c5\u51b5\u65f6\u624d\u4f1a\u4f1a\u52a0\u8f7d\u7c7b\uff1a<\/p>\n\n\n\n
      \n
    • \u8bbf\u95ee\u7c7b\u7684\u9759\u6001\u53d8\u91cf\uff0c\u6216\u8005\u4e3a\u9759\u6001\u53d8\u91cf\u8d4b\u503c<\/li>\n\n\n\n
    • new \u521b\u5efa\u7c7b\u7684\u5b9e\u4f8b\uff08\u9690\u5f0f\u52a0\u8f7d\uff09<\/li>\n\n\n\n
    • \u8c03\u7528\u7c7b\u7684\u9759\u6001\u65b9\u6cd5<\/li>\n\n\n\n
    • \u5b50\u7c7b\u521d\u59cb\u5316\u65f6<\/li>\n\n\n\n
    • \u5176\u4ed6\u7684\u60c5\u51b5\u4f1a\u5728\u8bb2\u5230\u53cd\u5c04\u65f6\u4ecb\u7ecd<\/li>\n<\/ul>\n\n\n\n
      \u6240\u6709\u88ab\u6807\u8bb0\u4e3a\u9759\u6001\u7684\u5185\u5bb9\uff0c\u4f1a\u5728\u7c7b\u521a\u52a0\u8f7d\u7684\u65f6\u5019\u5c31\u5206\u914d\uff0c\u800c\u4e0d\u662f\u5728\u5bf9\u8c61\u521b\u5efa\u7684\u65f6\u5019\u5206\u914d\uff0c\u6240\u4ee5\u8bf4\u9759\u6001\u5185\u5bb9\u4e00\u5b9a\u4f1a\u5728\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u521d\u59cb\u5316\u4e4b\u524d\u5b8c\u6210\u52a0\u8f7d\u3002<\/p>\n\n\n\n
      \u6211\u4eec\u53ef\u4ee5\u6765\u6d4b\u8bd5\u4e00\u4e0b\uff1a<\/p>\n\n\n\n
      public class Person {
          String name = test();  \/\/\u8fd9\u91cc\u6211\u4eec\u7528test\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u4f5c\u4e3a\u53d8\u91cf\u7684\u521d\u59cb\u503c\uff0c\u4fbf\u4e8e\u89c2\u5bdf
          int age;
          String sex;
      \u200b
          {
              System.out.println(\"\u6211\u662f\u666e\u901a\u4ee3\u7801\u5757\");
          }
          
          Person(){
              System.out.println(\"\u6211\u662f\u6784\u9020\u65b9\u6cd5\");
          }
          
          String test(){
              System.out.println(\"\u6211\u662f\u6210\u5458\u53d8\u91cf\u521d\u59cb\u5316\");
              return \"\u5c0f\u660e\";
          }
      \u200b
          static String info = init();   \/\/\u8fd9\u91cc\u6211\u4eec\u7528init\u9759\u6001\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u4f5c\u4e3a\u53d8\u91cf\u7684\u521d\u59cb\u503c\uff0c\u4fbf\u4e8e\u89c2\u5bdf
      \u200b
          static {
              System.out.println(\"\u6211\u662f\u9759\u6001\u4ee3\u7801\u5757\");
          }
      \u200b
          static String init(){
              System.out.println(\"\u6211\u662f\u9759\u6001\u53d8\u91cf\u521d\u59cb\u5316\");
              return \"test\";
          }
      }<\/pre>\n\n\n\n
      \u73b0\u5728\u6211\u4eec\u5728\u4e3b\u65b9\u6cd5\u4e2d\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\uff0c\u89c2\u5bdf\u8fd9\u51e0\u6b65\u662f\u600e\u4e48\u5728\u6267\u884c\u7684\uff1a<\/p>\n\n\n\n
      \"image-20220921000953525\"\/<\/div><\/figure>\n\n\n\n
      \u53ef\u4ee5\u770b\u5230\uff0c\u786e\u5b9e\u662f\u9759\u6001\u5185\u5bb9\u5728\u5bf9\u8c61\u6784\u9020\u4e4b\u524d\u7684\u5c31\u5b8c\u6210\u4e86\u521d\u59cb\u5316\uff0c\u5b9e\u9645\u4e0a\u5c31\u662f\u7c7b\u521d\u59cb\u5316\u65f6\u5b8c\u6210\u7684\u3002<\/p>\n\n\n\n
      \u5f53\u7136\uff0c\u5982\u679c\u6211\u4eec\u76f4\u63a5\u8bbf\u95ee\u7c7b\u7684\u9759\u6001\u53d8\u91cf\uff1a<\/p>\n\n\n\n
      public static void main(String[] args) {
          System.out.println(Person.info);
      }<\/pre>\n\n\n\n
      \u90a3\u4e48\u6b64\u65f6\u540c\u6837\u4f1a\u4f7f\u5f97\u7c7b\u521d\u59cb\u5316\uff0c\u8fdb\u884c\u52a0\u8f7d\uff1a<\/p>\n\n\n\n
      \"image-20220921001222465\"\/<\/div><\/figure>\n\n\n\n
      \u53ef\u4ee5\u770b\u5230\uff0c\u5728\u4f7f\u7528\u65f6\uff0c\u786e\u5b9e\u662f\u5148\u5c06\u9759\u6001\u5185\u5bb9\u521d\u59cb\u5316\u4e4b\u540e\uff0c\u624d\u5f97\u5230\u503c\u7684\u3002\u5f53\u7136\uff0c\u5982\u679c\u6211\u4eec\u538b\u6839\u5c31\u6ca1\u6709\u53bb\u4f7f\u7528\u8fd9\u4e2a\u7c7b\uff0c\u90a3\u4e48\u4e5f\u4e0d\u4f1a\u88ab\u521d\u59cb\u5316\u4e86\u3002<\/p>\n\n\n\n
      \u6709\u5173\u7c7b\u4e0e\u5bf9\u8c61\u7684\u57fa\u672c\u5185\u5bb9\uff0c\u6211\u4eec\u5c31\u5168\u90e8\u8bb2\u89e3\u5b8c\u6bd5\u4e86\u3002<\/p>\n\n\n\n
      \n\n\n\n
      \u5305\u548c\u8bbf\u95ee\u63a7\u5236<\/h2>\n\n\n\n
      \u901a\u8fc7\u524d\u9762\u7684\u5b66\u4e60\uff0c\u6211\u4eec\u77e5\u9053\u8be5\u5982\u4f55\u521b\u5efa\u548c\u4f7f\u7528\u7c7b\u3002<\/p>\n\n\n\n
      \u5305\u58f0\u660e\u548c\u5bfc\u5165<\/h3>\n\n\n\n
      \u5305\u5176\u5b9e\u5c31\u662f\u7528\u6765\u533a\u5206\u7c7b\u4f4d\u7f6e\u7684\u4e1c\u897f\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u5c06\u6211\u4eec\u7684\u7c7b\u8fdb\u884c\u5206\u7c7b\uff08\u7c7b\u4f3c\u4e8eC++\u4e2d\u7684namespace\uff09\u968f\u7740\u6211\u4eec\u7684\u7a0b\u5e8f\u4e0d\u65ad\u53d8\u5927\uff0c\u53ef\u80fd\u4f1a\u521b\u5efa\u5404\u79cd\u5404\u6837\u7684\u7c7b\uff0c\u4ed6\u4eec\u53ef\u80fd\u4f1a\u505a\u4e0d\u540c\u7684\u4e8b\u60c5\uff0c\u90a3\u4e48\u8fd9\u4e9b\u7c7b\u5982\u679c\u90fd\u653e\u5728\u4e00\u8d77\u7684\u8bdd\uff0c\u6709\u70b9\u6df7\u4e71\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5305\u7684\u5f62\u5f0f\u5c06\u8fd9\u4e9b\u7c7b\u8fdb\u884c\u5206\u7c7b\u5b58\u653e\u3002<\/p>\n\n\n\n
      \u5305\u7684\u547d\u540d\u89c4\u5219\u540c\u6837\u662f\u82f1\u6587\u548c\u6570\u5b57\u7684\u7ec4\u5408\uff0c\u6700\u597d\u662f\u4e00\u4e2a\u57df\u540d\u7684\u683c\u5f0f\uff0c\u6bd4\u5982\u6211\u4eec\u7ecf\u5e38\u8bbf\u95ee\u7684www.baidu.com<\/code>\uff0c\u540e\u9762\u7684baidu.com\u5c31\u662f\u57df\u540d\uff0c\u6211\u4eec\u7684\u5305\u5c31\u53ef\u4ee5\u547d\u540d\u4e3acom.baidu<\/code>\uff0c\u5f53\u7136\uff0c\u5404\u4f4d\u5c0f\u4f19\u4f34\u73b0\u5728\u8fd8\u6ca1\u6709\u81ea\u5df1\u7684\u57df\u540d\uff0c\u6240\u4ee5\u8bf4\u6211\u4eec\u968f\u4fbf\u8d77\u4e00\u4e2a\u540d\u79f0\u5c31\u53ef\u4ee5\u4e86\u3002\u5176\u4e2d\u7684.<\/code>\u5c31\u662f\u7528\u4e8e\u5206\u5272\u7684\uff0c\u5bf9\u5e94\u591a\u4e2a\u6587\u4ef6\u5939\uff0c\u6bd4\u5982com.test<\/code>\uff1a<\/p>\n\n\n\n
      \"image-20220921120040350\"\/<\/div><\/figure>\n\n\n\n
      \u6211\u4eec\u53ef\u4ee5\u5c06\u7c7b\u653e\u5165\u5230\u5305\u4e2d\uff1a<\/p>\n\n\n\n
      \"image-20220921115055000\"\/<\/div><\/figure>\n\n\n\n
      \u6211\u4eec\u4e4b\u524d\u90fd\u662f\u76f4\u63a5\u521b\u5efa\u7684\u7c7b\uff0c\u6240\u4ee5\u8bf4\u6ca1\u6709\u5305\u8fd9\u4e2a\u6982\u5ff5\uff0c\u4f46\u662f\u73b0\u5728\uff0c\u6211\u4eec\u5c06\u7c7b\u653e\u5230\u5305\u4e2d\uff0c\u5c31\u9700\u8981\u6ce8\u610f\u4e86\uff1a<\/p>\n\n\n\n
      package com.test;   \/\/\u5728\u653e\u5165\u5305\u4e2d\uff0c\u9700\u8981\u5728\u7c7b\u7684\u6700\u4e0a\u9762\u6dfb\u52a0package\u5173\u952e\u5b57\u6765\u6307\u660e\u5f53\u524d\u7c7b\u6240\u5904\u7684\u5305

      public class Main {   \/\/\u5c06Main\u7c7b\u653e\u5230com.test\u8fd9\u4e2a\u5305\u4e2d
          public static void main(String[] args) {

          }
      }<\/pre>\n\n\n\n
      \u8fd9\u91cc\u53c8\u662f\u4e00\u4e2a\u65b0\u7684\u5173\u952e\u5b57package<\/code>\uff0c\u8fd9\u4e2a\u662f\u7528\u4e8e\u6307\u5b9a\u5f53\u524d\u7c7b\u6240\u5904\u7684\u5305\u7684\uff0c\u6ce8\u610f\uff0c\u6240\u5904\u7684\u5305\u548c\u5bf9\u5e94\u7684\u76ee\u5f55\u662f\u4e00\u4e00\u5bf9\u5e94\u7684\u3002<\/p>\n\n\n\n
      \u4e0d\u540c\u7684\u7c7b\u53ef\u4ee5\u653e\u5728\u4e0d\u540c\u7684\u5305\u4e0b\uff1a<\/p>\n\n\n\n
      \"image-20220921120241184\"\/<\/div><\/figure>\n\n\n\n
      \u5f53\u6211\u4eec\u4f7f\u7528\u540c\u4e00\u4e2a\u5305\u4e2d\u7684\u7c7b\u65f6\uff0c\u76f4\u63a5\u4f7f\u7528\u5373\u53ef\uff08\u4e4b\u524d\u5c31\u662f\u76f4\u63a5\u4f7f\u7528\u7684\uff0c\u56e0\u4e3a\u90fd\u76f4\u63a5\u5728\u4e00\u4e2a\u7f3a\u7701\u7684\u5305\u4e2d\uff09\u800c\u5f53\u6211\u4eec\u9700\u8981\u4f7f\u7528\u5176\u4ed6\u5305\u4e2d\u7684\u7c7b\u65f6\uff0c\u9700\u8981\u5148\u8fdb\u884c\u5bfc\u5165\u624d\u53ef\u4ee5\uff1a<\/p>\n\n\n\n
      package com.test;

      import com.test.entity.Person;   \/\/\u4f7f\u7528import\u5173\u952e\u5b57\u5bfc\u5165\u5176\u4ed6\u5305\u4e2d\u7684\u7c7b

      public class Main {
          public static void main(String[] args) {
              Person person = new Person();   \/\/\u53ea\u6709\u5bfc\u5165\u4e4b\u540e\u624d\u53ef\u4ee5\u4f7f\u7528\uff0c\u5426\u5219\u7f16\u8bd1\u5668\u4e0d\u77e5\u9053\u8fd9\u4e2a\u7c7b\u4ece\u54ea\u6765\u7684
          }
      }<\/pre>\n\n\n\n
      \u8fd9\u91cc\u4f7f\u7528\u4e86import<\/code>\u5173\u952e\u5b57\u5bfc\u5165\u6211\u4eec\u9700\u8981\u4f7f\u7528\u7684\u7c7b\uff0c\u5f53\u7136\uff0c\u53ea\u6709\u5728\u7c7b\u4e0d\u5728\u540c\u4e00\u4e2a\u5305\u4e0b\u65f6\u624d\u9700\u8981\u8fdb\u884c\u5bfc\u5165\uff0c\u5982\u679c\u4e00\u4e2a\u5305\u4e2d\u6709\u591a\u4e2a\u7c7b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528*<\/code>\u8868\u793a\u5bfc\u5165\u8fd9\u4e2a\u5305\u4e2d\u5168\u90e8\u7684\u7c7b\uff1a<\/p>\n\n\n\n
      import com.test.entity.*;<\/pre>\n\n\n\n
      \u5b9e\u9645\u4e0a\u6211\u4eec\u4e4b\u524d\u4e00\u76f4\u5728\u4f7f\u7528\u7684System<\/code>\u7c7b\uff0c\u4e5f\u662f\u5728\u4e00\u4e2a\u5305\u4e2d\u7684\uff1a<\/p>\n\n\n\n
      package java.lang;
      \u200b
      import java.io.*;
      import java.lang.reflect.Executable;
      import java.lang.annotation.Annotation;
      import java.security.AccessControlContext;
      import java.util.Properties;
      import java.util.PropertyPermission;
      import java.util.StringTokenizer;
      import java.util.Map;
      import java.security.AccessController;
      import java.security.PrivilegedAction;
      import java.security.AllPermission;
      import java.nio.channels.Channel;
      import java.nio.channels.spi.SelectorProvider;
      import sun.nio.ch.Interruptible;
      import sun.reflect.CallerSensitive;
      import sun.reflect.Reflection;
      import sun.security.util.SecurityConstants;
      import sun.reflect.annotation.AnnotationType;
      \u200b
      import jdk.internal.util.StaticProperty;
      \u200b
      \/**
       * The <code>System<\/code> class contains several useful class fields
       * and methods. It cannot be instantiated.
       *
       * <p>Among the facilities provided by the <code>System<\/code> class
       * are standard input, standard output, and error output streams;
       * access to externally defined properties and environment
       * variables; a means of loading files and libraries; and a utility
       * method for quickly copying a portion of an array.
       *
       * @author  unascribed
       * @since   JDK1.0
       *\/
      public final class System {
            ...
      }<\/pre>\n\n\n\n
      \u53ef\u4ee5\u770b\u5230\u5b83\u662f\u5c5e\u4e8ejava.lang<\/code>\u8fd9\u4e2a\u5305\u4e0b\u7684\u7c7b\uff0c\u5e76\u4e14\u8fd9\u4e2a\u7c7b\u4e5f\u5bfc\u5165\u4e86\u5f88\u591a\u5176\u4ed6\u5305\u4e2d\u7684\u7c7b\u5728\u8fdb\u884c\u4f7f\u7528\u3002\u90a3\u4e48\uff0c\u4e3a\u4ec0\u4e48\u6211\u4eec\u5728\u4f7f\u7528\u8fd9\u4e2a\u7c7b\u65f6\uff0c\u6ca1\u6709\u5bfc\u5165\u5462\uff1f\u5b9e\u9645\u4e0aJava\u4e2d\u4f1a\u9ed8\u8ba4\u5bfc\u5165java.lang<\/code>\u8fd9\u4e2a\u5305\u4e0b\u7684\u6240\u6709\u7c7b\uff0c\u56e0\u6b64\u6211\u4eec\u4e0d\u9700\u8981\u624b\u52a8\u6307\u5b9a\u3002<\/p>\n\n\n\n
      IDEA\u975e\u5e38\u667a\u80fd\uff0c\u6211\u4eec\u5728\u4f7f\u7528\u9879\u76ee\u4e2d\u5b9a\u4e49\u7684\u7c7b\u65f6\uff0c\u4f1a\u81ea\u52a8\u5e2e\u6211\u4eec\u5c06\u5bfc\u5165\u8865\u5168\uff0c\u6240\u4ee5\u8bf4\u4ee3\u7801\u5199\u8d77\u6765\u975e\u5e38\u9ad8\u6548\u3002<\/p>\n\n\n\n
      \u6ce8\u610f\uff0c\u5728\u4e0d\u540c\u5305\u4e0b\u7684\u7c7b\uff0c\u5373\u4f7f\u7c7b\u540d\u76f8\u540c\uff0c\u4e5f\u662f\u4e0d\u540c\u7684\u4e24\u4e2a\u7c7b\uff1a<\/p>\n\n\n\n
      package com.test.entity;
      \u200b
      public class String {    \/\/\u6211\u4eec\u5728\u81ea\u5df1\u7684\u5305\u4e2d\u4e5f\u5efa\u4e00\u4e2a\u540d\u4e3aString\u7684\u7c7b
      }<\/pre>\n\n\n\n
      \u5f53\u6211\u4eec\u5728\u4f7f\u7528\u65f6\uff1a<\/p>\n\n\n\n
      \u7531\u4e8e\u9ed8\u8ba4\u5bfc\u5165\u4e86\u7cfb\u7edf\u81ea\u5e26\u7684String\u7c7b\uff0c\u5e76\u4e14\u4e5f\u5bfc\u5165\u4e86\u6211\u4eec\u81ea\u5df1\u5b9a\u4e49\u7684String\u7c7b\uff0c\u90a3\u4e48\u6b64\u65f6\u5c31\u51fa\u73b0\u4e86\u6b67\u4e49\uff0c\u7f16\u8bd1\u5668\u4e0d\u77e5\u9053\u5230\u5e95\u6211\u4eec\u60f3\u7528\u7684\u662f\u54ea\u4e00\u4e2aString\u7c7b\uff0c\u6240\u4ee5\u8bf4\u6211\u4eec\u9700\u8981\u660e\u786e\u6307\u5b9a\uff1a<\/p>\n\n\n\n
      public class Main {
          public static void main(java.lang.String[] args) {   \/\/\u4e3b\u65b9\u6cd5\u7684String\u53c2\u6570\u662fjava.lang\u5305\u4e0b\u7684\uff0c\u6211\u4eec\u9700\u8981\u660e\u786e\u6307\u5b9a\u4e00\u4e0b\uff0c\u53ea\u9700\u8981\u5728\u7c7b\u540d\u524d\u9762\u6dfb\u52a0\u5305\u540d\u5c31\u884c\u4e86
                      com.test.entity.String string = new com.test.entity.String();
          }
      }<\/pre>\n\n\n\n
      \u6211\u4eec\u53ea\u9700\u8981\u5728\u7c7b\u540d\u524d\u9762\u628a\u5b8c\u6574\u7684\u5305\u540d\u4e5f\u7ed9\u5199\u4e0a\uff0c\u5c31\u53ef\u4ee5\u8868\u793a\u8fd9\u4e2a\u662f\u54ea\u4e00\u4e2a\u5305\u91cc\u7684\u7c7b\u4e86\uff0c\u5f53\u7136\uff0c\u5982\u679c\u6ca1\u6709\u51fa\u73b0\u6b67\u4e49\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u5305\u540d\u662f\u53ef\u4ee5\u7701\u7565\u7684\uff0c\u53ef\u5199\u53ef\u4e0d\u5199\u3002<\/p>\n\n\n\n
      \u53ef\u80fd\u5404\u4f4d\u5c0f\u4f19\u4f34\u4f1a\u53d1\u73b0\u4e00\u4e2a\u95ee\u9898\uff0c\u4e3a\u4ec0\u4e48\u5bf9\u8c61\u7684\u5c5e\u6027\u8bbf\u95ee\u4e0d\u4e86\u4e86\uff1f<\/p>\n\n\n\n
      \"image-20220921122514457\"\/<\/div><\/figure>\n\n\n\n
      \u7f16\u8bd1\u5668\u8bf4name\u5c5e\u6027\u5728\u8fd9\u4e2a\u7c7b\u4e2d\u4e0d\u662fpublic\uff0c\u65e0\u6cd5\u5728\u5916\u90e8\u8fdb\u884c\u8bbf\u95ee\uff0c\u8fd9\u662f\u4ec0\u4e48\u60c5\u51b5\u5462\uff1f\u8fd9\u91cc\u6211\u4eec\u5c31\u8981\u4ecb\u7ecd\u7684\u5230Java\u7684\u8bbf\u95ee\u6743\u9650\u63a7\u5236\u4e86\u3002<\/p>\n\n\n\n
      \u8bbf\u95ee\u6743\u9650\u63a7\u5236<\/h3>\n\n\n\n
      \u5b9e\u9645\u4e0aJava\u4e2d\u662f\u6709\u8bbf\u95ee\u6743\u9650\u63a7\u5236\u7684\uff0c\u5c31\u662f\u6211\u4eec\u4e2a\u4eba\u7684\u9690\u79c1\u7684\u4e00\u6837\uff0c\u6211\u4e0d\u5141\u8bb8\u522b\u4eba\u968f\u4fbf\u6765\u67e5\u770b\u6211\u4eec\u7684\u9690\u79c1\uff0c\u53ea\u6709\u6211\u4eec\u81ea\u5df1\u540c\u610f\u7684\u60c5\u51b5\u4e0b\uff0c\u624d\u80fd\u544a\u8bc9\u522b\u4eba\u6211\u4eec\u7684\u540d\u5b57\u3001\u5e74\u9f84\u7b49\u9690\u79c1\u4fe1\u606f\u3002<\/p>\n\n\n\n
      \u6240\u4ee5\u8bf4Java\u4e2d\u5f15\u5165\u4e86\u8bbf\u95ee\u6743\u9650\u63a7\u5236\uff08\u53ef\u89c1\u6027\uff09\uff0c\u6211\u4eec\u53ef\u4ee5\u4e3a\u6210\u5458\u53d8\u91cf\u3001\u6210\u5458\u65b9\u6cd5\u3001\u9759\u6001\u53d8\u91cf\u3001\u9759\u6001\u65b9\u6cd5\u751a\u81f3\u662f\u7c7b\u6307\u5b9a\u8bbf\u95ee\u6743\u9650\uff0c\u4e0d\u540c\u7684\u8bbf\u95ee\u6743\u9650\uff0c\u6709\u7740\u4e0d\u540c\u7a0b\u5ea6\u7684\u8bbf\u95ee\u9650\u5236\uff1a<\/p>\n\n\n\n
        \n
      • private<\/code> – \u79c1\u6709\uff0c\u6807\u8bb0\u4e3a\u79c1\u6709\u7684\u5185\u5bb9\u65e0\u6cd5\u88ab\u9664\u5f53\u524d\u7c7b\u4ee5\u5916\u7684\u4efb\u4f55\u4f4d\u7f6e\u8bbf\u95ee\u3002<\/li>\n\n\n\n
      • \u4ec0\u4e48\u90fd\u4e0d\u5199<\/code> – \u9ed8\u8ba4\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u53ea\u80fd\u88ab\u7c7b\u672c\u8eab\u548c\u540c\u5305\u4e2d\u7684\u5176\u4ed6\u7c7b\u8bbf\u95ee\u3002<\/li>\n\n\n\n
      • protected<\/code> – \u53d7\u4fdd\u62a4\uff0c\u6807\u8bb0\u4e3a\u53d7\u4fdd\u62a4\u7684\u5185\u5bb9\u53ef\u4ee5\u80fd\u88ab\u7c7b\u672c\u8eab\u548c\u540c\u5305\u4e2d\u7684\u5176\u4ed6\u7c7b\u8bbf\u95ee\uff0c\u4e5f\u53ef\u4ee5\u88ab\u5b50\u7c7b\u8bbf\u95ee\uff08\u5b50\u7c7b\u6211\u4eec\u4f1a\u5728\u4e0b\u4e00\u7ae0\u4ecb\u7ecd\uff09<\/li>\n\n\n\n
      • public<\/code> – \u516c\u5171\uff0c\u6807\u8bb0\u4e3a\u516c\u5171\u7684\u5185\u5bb9\uff0c\u5141\u8bb8\u5728\u4efb\u4f55\u5730\u65b9\u88ab\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n\n\n\n
        \u8fd9\u56db\u79cd\u8bbf\u95ee\u6743\u9650\uff0c\u603b\u7ed3\u5982\u4e0b\u8868\uff1a<\/p>\n\n\n\n
        <\/th>\u5f53\u524d\u7c7b<\/th>\u540c\u4e00\u4e2a\u5305\u4e0b\u7684\u7c7b<\/th>\u4e0d\u540c\u5305\u4e0b\u7684\u5b50\u7c7b<\/th>\u4e0d\u540c\u5305\u4e0b\u7684\u7c7b<\/th><\/tr><\/thead>
        public<\/td>\u2705<\/td>\u2705<\/td>\u2705<\/td>\u2705<\/td><\/tr>
        protected<\/td>\u2705<\/td>\u2705<\/td>\u2705<\/td>\u274c<\/td><\/tr>
        \u9ed8\u8ba4<\/td>\u2705<\/td>\u2705<\/td>\u274c<\/td>\u274c<\/td><\/tr>
        private<\/td>\u2705<\/td>\u274c<\/td>\u274c<\/td>\u274c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
        \u6bd4\u5982\u6211\u4eec\u521a\u521a\u51fa\u73b0\u7684\u60c5\u51b5\uff0c\u5c31\u662f\u56e0\u4e3a\u662f\u9ed8\u8ba4\u7684\u8bbf\u95ee\u6743\u9650\uff0c\u6240\u4ee5\u8bf4\u5728\u5f53\u524d\u5305\u4ee5\u5916\u7684\u5176\u4ed6\u5305\u4e2d\u65e0\u6cd5\u8bbf\u95ee\uff0c\u4f46\u662f\u6211\u4eec\u53ef\u4ee5\u63d0\u5347\u5b83\u7684\u8bbf\u95ee\u6743\u9650\uff0c\u6765\u4f7f\u5f97\u5916\u90e8\u4e5f\u53ef\u4ee5\u8bbf\u95ee\uff1a<\/p>\n\n\n\n
        public class Person {
            public String name;   \/\/\u5728name\u53d8\u91cf\u524d\u6dfb\u52a0public\u5173\u952e\u5b57\uff0c\u5c06\u5176\u53ef\u89c1\u6027\u63d0\u5347\u4e3a\u516c\u5171\u7b49\u7ea7
            int age;
            String sex;
        }<\/pre>\n\n\n\n
        \u8fd9\u6837\u6211\u4eec\u5c31\u53ef\u4ee5\u5728\u5916\u90e8\u6b63\u5e38\u4f7f\u7528\u8fd9\u4e2a\u5c5e\u6027\u4e86\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) {
            Person person = new Person();
            System.out.println(person.name);   \/\/\u6b63\u5e38\u8bbf\u95ee\u5230\u6210\u5458\u53d8\u91cf
        }<\/pre>\n\n\n\n
        \u5b9e\u9645\u4e0a\u5982\u679c\u5404\u4f4d\u5c0f\u4f19\u4f34\u89c2\u5bdf\u4ed4\u7ec6\u7684\u8bdd\uff0c\u4f1a\u53d1\u73b0\u6211\u4eec\u521b\u5efa\u51fa\u6765\u7684\u7c7b\u81ea\u5e26\u7684\u8bbf\u95ee\u7b49\u7ea7\u5c31\u662fpublic<\/code>\uff1a<\/p>\n\n\n\n
        package com.test.entity;

        public class Person {   \/\/class\u524d\u9762\u6709public\u5173\u952e\u5b57

        }<\/pre>\n\n\n\n
        \u4e5f\u5c31\u662f\u8bf4\u8fd9\u4e2a\u7c7b\u5b9e\u9645\u4e0a\u53ef\u4ee5\u5728\u4efb\u4f55\u5730\u65b9\u4f7f\u7528\uff0c\u4f46\u662f\u6211\u4eec\u4e5f\u53ef\u4ee5\u5c06\u5176\u4fee\u6539\u4e3a\u9ed8\u8ba4\u7684\u8bbf\u95ee\u7b49\u7ea7\uff1a<\/p>\n\n\n\n
        package com.test.entity;

        class Person {    \/\/\u53bb\u6389public\u53d8\u6210\u9ed8\u8ba4\u7b49\u7ea7
          
        }<\/pre>\n\n\n\n
        \u5982\u679c\u662f\u9ed8\u8ba4\u7b49\u7ea7\u7684\u8bdd\uff0c\u90a3\u4e48\u5728\u5916\u90e8\u540c\u6837\u662f\u65e0\u6cd5\u8bbf\u95ee\u7684\uff1a<\/p>\n\n\n\n
        \"image-20220921142724239\"\/<\/div><\/figure>\n\n\n\n
        \u4f46\u662f\u6ce8\u610f\uff0c\u6211\u4eec\u521b\u5efa\u7684\u666e\u901a\u7c7b\u4e0d\u80fd\u662fprotected<\/code>\u6216\u662fprivate<\/code>\u6743\u9650\uff0c\u56e0\u4e3a\u6211\u4eec\u76ee\u524d\u6240\u4f7f\u7528\u7684\u666e\u901a\u7c7b\u8981\u4e48\u5c31\u662f\u53ea\u7ed9\u5f53\u524d\u7684\u5305\u5185\u4f7f\u7528\uff0c\u8981\u4e48\u5c31\u662f\u7ed9\u5916\u9762\u90fd\u7528\uff0c\u5982\u679c\u662fprivate<\/code>\u8c01\u90fd\u4e0d\u80fd\u7528\uff0c\u90a3\u8fd9\u4e2a\u7c7b\u5b9a\u4e49\u51fa\u6765\u5e72\u561b\u5462\uff1f<\/p>\n\n\n\n
        \u5982\u679c\u67d0\u4e2a\u7c7b\u4e2d\u5b58\u5728\u9759\u6001\u65b9\u6cd5\u6216\u662f\u9759\u6001\u53d8\u91cf\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u9759\u6001\u5bfc\u5165\u7684\u65b9\u5f0f\u5c06\u5176\u4e2d\u7684\u9759\u6001\u65b9\u6cd5\u6216\u662f\u9759\u6001\u53d8\u91cf\u76f4\u63a5\u5bfc\u5165\u4f7f\u7528\uff0c\u4f46\u662f\u540c\u6837\u9700\u8981\u6709\u8bbf\u95ee\u6743\u9650\u7684\u60c5\u51b5\u4e0b\u624d\u53ef\u4ee5\uff1a<\/p>\n\n\n\n
        public class Person {
            String name;
            int age;
            String sex;
            
            public static void test(){
                System.out.println(\"\u6211\u662f\u9759\u6001\u65b9\u6cd5\uff01\");
            }
        }<\/pre>\n\n\n\n
        \u6211\u4eec\u6765\u5c1d\u8bd5\u4e00\u4e0b\u9759\u6001\u5bfc\u5165\uff1a<\/p>\n\n\n\n
        import static com.test.entity.Person.test;    \/\/\u9759\u6001\u5bfc\u5165test\u65b9\u6cd5

        public class Main {
            public static void main(String[] args) {
                test();    \/\/\u76f4\u63a5\u4f7f\u7528\u5c31\u53ef\u4ee5\uff0c\u5c31\u50cf\u5728\u8fd9\u4e2a\u7c7b\u5b9a\u4e49\u7684\u65b9\u6cd5\u4e00\u6837
            }
        }<\/pre>\n\n\n\n
        \u81f3\u6b64\uff0c\u6709\u5173\u5305\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u6211\u4eec\u5c31\u8bb2\u89e3\u5230\u8fd9\u91cc\u3002<\/p>\n\n\n\n
        \n\n\n\n
        \u5c01\u88c5\u3001\u7ee7\u627f\u548c\u591a\u6001<\/h2>\n\n\n\n
        \u5c01\u88c5\u3001\u7ee7\u627f\u548c\u591a\u6001\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u4e09\u5927\u7279\u6027\u3002<\/p>\n\n\n\n
        \n
        \u5c01\u88c5\uff0c\u628a\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u7ed3\u5408\u6210\u4e00\u4e2a\u72ec\u7acb\u7684\u6574\u4f53\uff0c\u9690\u85cf\u5b9e\u73b0\u7ec6\u8282\uff0c\u5e76\u63d0\u4f9b\u5bf9\u5916\u8bbf\u95ee\u7684\u63a5\u53e3\u3002<\/p>\n\n\n\n
        \u7ee7\u627f\uff0c\u4ece\u5df2\u77e5\u7684\u4e00\u4e2a\u7c7b\u4e2d\u6d3e\u751f\u51fa\u4e00\u4e2a\u65b0\u7684\u7c7b\uff0c\u53eb\u5b50\u7c7b\u3002\u5b50\u7c7b\u5b9e\u73b0\u4e86\u7236\u7c7b\u6240\u6709\u975e\u79c1\u6709\u5316\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u5e76\u6839\u636e\u5b9e\u9645\u9700\u6c42\u6269\u5c55\u51fa\u65b0\u7684\u884c\u4e3a\u3002<\/p>\n\n\n\n
        \u591a\u6001\uff0c\u591a\u4e2a\u4e0d\u540c\u7684\u5bf9\u8c61\u5bf9\u540c\u4e00\u6d88\u606f\u4f5c\u51fa\u54cd\u5e94\uff0c\u540c\u4e00\u6d88\u606f\u6839\u636e\u4e0d\u540c\u7684\u5bf9\u8c61\u800c\u91c7\u7528\u5404\u79cd\u4e0d\u540c\u7684\u65b9\u6cd5\u3002<\/p>\n<\/blockquote>\n\n\n\n
        \u6b63\u662f\u8fd9\u4e09\u5927\u7279\u6027\uff0c\u8ba9\u6211\u4eec\u7684Java\u7a0b\u5e8f\u66f4\u52a0\u751f\u52a8\u5f62\u8c61\u3002<\/p>\n\n\n\n
        \u7c7b\u7684\u5c01\u88c5<\/h3>\n\n\n\n
        \u5c01\u88c5\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u4fdd\u8bc1\u53d8\u91cf\u7684\u5b89\u5168\u6027\uff0c\u4f7f\u7528\u8005\u4e0d\u5fc5\u5728\u610f\u5177\u4f53\u5b9e\u73b0\u7ec6\u8282\uff0c\u800c\u53ea\u662f\u901a\u8fc7\u5916\u90e8\u63a5\u53e3\u5373\u53ef\u8bbf\u95ee\u7c7b\u7684\u6210\u5458\uff0c\u5982\u679c\u4e0d\u8fdb\u884c\u5c01\u88c5\uff0c\u7c7b\u4e2d\u7684\u5b9e\u4f8b\u53d8\u91cf\u53ef\u4ee5\u76f4\u63a5\u67e5\u770b\u548c\u4fee\u6539\uff0c\u53ef\u80fd\u7ed9\u6574\u4e2a\u4ee3\u7801\u5e26\u6765\u4e0d\u597d\u7684\u5f71\u54cd\uff0c\u56e0\u6b64\u5728\u7f16\u5199\u7c7b\u65f6\u4e00\u822c\u5c06\u6210\u5458\u53d8\u91cf\u79c1\u6709\u5316\uff0c\u5916\u90e8\u7c7b\u9700\u8981\u4f7f\u7528Getter\u548cSetter\u65b9\u6cd5\u6765\u67e5\u770b\u548c\u8bbe\u7f6e\u53d8\u91cf\u3002<\/p>\n\n\n\n
        \u6211\u4eec\u53ef\u4ee5\u5c06\u4e4b\u524d\u7684\u7c7b\u8fdb\u884c\u6539\u8fdb\uff1a<\/p>\n\n\n\n
        public class Person {
            private String name;    \/\/\u73b0\u5728\u7c7b\u7684\u5c5e\u6027\u53ea\u80fd\u88ab\u81ea\u5df1\u76f4\u63a5\u8bbf\u95ee
            private int age;
            private String sex;
          
            public Person(String name, int age, String sex) {   \/\/\u6784\u9020\u65b9\u6cd5\u4e5f\u8981\u58f0\u660e\u4e3a\u516c\u5171\uff0c\u5426\u5219\u5bf9\u8c61\u90fd\u6784\u9020\u4e0d\u4e86
                this.name = name;
                this.age = age;
                this.sex = sex;
            }
        \u200b
            public String getName() {
                return name;    \/\/\u60f3\u8981\u77e5\u9053\u8fd9\u4e2a\u5bf9\u8c61\u7684\u540d\u5b57\uff0c\u5fc5\u987b\u901a\u8fc7getName()\u65b9\u6cd5\u6765\u83b7\u53d6\uff0c\u5e76\u4e14\u5f97\u5230\u7684\u53ea\u662f\u540d\u5b57\u503c\uff0c\u5916\u90e8\u65e0\u6cd5\u4fee\u6539
            }
        \u200b
            public String getSex() {
                return sex;
            }
        \u200b
            public int getAge() {
                return age;
            }
        }<\/pre>\n\n\n\n
        \u6211\u4eec\u53ef\u4ee5\u6765\u8bd5\u4e00\u4e0b\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) {
            Person person = new Person(\"\u5c0f\u660e\", 18, \"\u7537\");
            System.out.println(person.getName());    \/\/\u53ea\u80fd\u901a\u8fc7\u8c03\u7528getName()\u65b9\u6cd5\u6765\u83b7\u53d6\u540d\u5b57
        }<\/pre>\n\n\n\n
        \u4e5f\u5c31\u662f\u8bf4\uff0c\u5916\u90e8\u73b0\u5728\u53ea\u80fd\u901a\u8fc7\u8c03\u7528\u6211\u5b9a\u4e49\u7684\u65b9\u6cd5\u6765\u83b7\u53d6\u6210\u5458\u5c5e\u6027\uff0c\u800c\u6211\u4eec\u53ef\u4ee5\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\u8fdb\u884c\u4e00\u4e9b\u989d\u5916\u7684\u64cd\u4f5c\uff0c\u6bd4\u5982\u5c0f\u660e\u53ef\u4ee5\u4fee\u6539\u540d\u5b57\uff0c\u4f46\u662f\u540d\u5b57\u4e2d\u4e0d\u80fd\u5305\u542b”\u5c0f”\u8fd9\u4e2a\u5b57\uff1a<\/p>\n\n\n\n
        public void setName(String name) {
            if(name.contains(\"\u5c0f\")) return;
            this.name = name;
        }<\/pre>\n\n\n\n
        \u6211\u4eec\u751a\u81f3\u8fd8\u53ef\u4ee5\u5c06\u6784\u9020\u65b9\u6cd5\u6539\u6210\u79c1\u6709\u7684\uff0c\u9700\u8981\u901a\u8fc7\u6211\u4eec\u7684\u5185\u90e8\u7684\u65b9\u5f0f\u6765\u6784\u9020\u5bf9\u8c61\uff1a<\/p>\n\n\n\n
        public class Person {
            private String name;
            private int age;
            private String sex;

            private Person(){}   \/\/\u4e0d\u5141\u8bb8\u5916\u90e8\u4f7f\u7528new\u5173\u952e\u5b57\u521b\u5efa\u5bf9\u8c61
            
            public static Person getInstance() {   \/\/\u800c\u662f\u9700\u8981\u4f7f\u7528\u6211\u4eec\u7684\u72ec\u7279\u65b9\u6cd5\u6765\u751f\u6210\u5bf9\u8c61\u5e76\u8fd4\u56de
                return new Person();
            }
        }<\/pre>\n\n\n\n
        \u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f\uff1a<\/p>\n\n\n\n
        \n
        public class Test {
         private static Test instance;

         private Test(){}

         public static Test getInstance() {
             if(instance == null) 
                 instance = new Test();
             return instance;
         }
        }<\/pre>\n\n\n\n
        \u5355\u4f8b\u6a21\u5f0f\u5c31\u662f\u5168\u5c40\u53ea\u80fd\u4f7f\u7528\u8fd9\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4e0d\u80fd\u521b\u5efa\u66f4\u591a\u7684\u5bf9\u8c61\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5c01\u88c5\u6210\u8fd9\u6837\uff0c\u5173\u4e8e\u5355\u4f8b\u6a21\u5f0f\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u8fd8\u8bf7\u5404\u4f4d\u5c0f\u4f19\u4f34\u5728\u300aJava\u8bbe\u8ba1\u6a21\u5f0f\u300b\u89c6\u9891\u6559\u7a0b\u4e2d\u518d\u8fdb\u884c\u5b66\u4e60\u3002<\/p>\n<\/blockquote>\n\n\n\n
        \u5c01\u88c5\u601d\u60f3\u5176\u5b9e\u5c31\u662f\u628a\u5b9e\u73b0\u7ec6\u8282\u7ed9\u9690\u85cf\u4e86\uff0c\u5916\u90e8\u53ea\u9700\u77e5\u9053\u8fd9\u4e2a\u65b9\u6cd5\u662f\u4ec0\u4e48\u4f5c\u7528\uff0c\u800c\u65e0\u9700\u5173\u5fc3\u5b9e\u73b0\uff0c\u8981\u7528\u4ec0\u4e48\u7531\u7c7b\u81ea\u5df1\u6765\u505a\uff0c\u4e0d\u9700\u8981\u5916\u9762\u6765\u64cd\u4f5c\u7c7b\u5185\u90e8\u7684\u4e1c\u897f\u53bb\u5b8c\u6210\uff0c\u5c01\u88c5\u5c31\u662f\u901a\u8fc7\u8bbf\u95ee\u6743\u9650\u63a7\u5236\u6765\u5b9e\u73b0\u7684\u3002<\/p>\n\n\n\n
        \u7c7b\u7684\u7ee7\u627f<\/h3>\n\n\n\n
        \u524d\u9762\u6211\u4eec\u4ecb\u7ecd\u4e86\u7c7b\u7684\u5c01\u88c5\uff0c\u6211\u4eec\u63a5\u7740\u6765\u770b\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7279\u6027\uff1a\u7ee7\u627f\u3002<\/p>\n\n\n\n
        \u5728\u5b9a\u4e49\u4e0d\u540c\u7c7b\u7684\u65f6\u5019\u5b58\u5728\u4e00\u4e9b\u76f8\u540c\u5c5e\u6027\uff0c\u4e3a\u4e86\u65b9\u4fbf\u4f7f\u7528\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u5171\u540c\u5c5e\u6027\u62bd\u8c61\u6210\u4e00\u4e2a\u7236\u7c7b\uff0c\u5728\u5b9a\u4e49\u5176\u4ed6\u5b50\u7c7b\u65f6\u53ef\u4ee5\u7ee7\u627f\u81ea\u8be5\u7236\u7c7b\uff0c\u51cf\u5c11\u4ee3\u7801\u7684\u91cd\u590d\u5b9a\u4e49\uff0c\u5b50\u7c7b\u53ef\u4ee5\u4f7f\u7528\u7236\u7c7b\u4e2d\u975e\u79c1\u6709<\/strong>\u7684\u6210\u5458\u3002<\/p>\n\n\n\n
        \u6bd4\u5982\u8bf4\u6211\u4eec\u4e00\u5f00\u59cb\u4f7f\u7528\u7684\u4eba\u7c7b\uff0c\u90a3\u4e48\u5b9e\u9645\u4e0a\u4eba\u7c7b\u6839\u636e\u804c\u4e1a\u5212\u5206\uff0c\u6240\u638c\u63e1\u7684\u6280\u80fd\u4e5f\u4f1a\u4e0d\u540c\uff0c\u6bd4\u5982\u753b\u5bb6\u4f1a\u753b\u753b\uff0c\u6b4c\u624b\u4f1a\u5531\uff0c\u821e\u8005\u4f1a\u8df3\uff0cRapper\u4f1arap\uff0c\u8fd0\u52a8\u5458\u4f1a\u7bee\u7403\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4eba\u7c7b\u8fd9\u4e2a\u5927\u7c7b\u6839\u636e\u804c\u4e1a\u8fdb\u4e00\u6b65\u5730\u7ec6\u5206\u51fa\u6765\uff1a<\/p>\n\n\n\n
        \"image-20220921150139125\"\/<\/div><\/figure>\n\n\n\n
        \u5b9e\u9645\u4e0a\u8fd9\u4e9b\u5212\u5206\u51fa\u6765\u7684\u7c7b\uff0c\u672c\u8d28\u4e0a\u8fd8\u662f\u4eba\u7c7b\uff0c\u4e5f\u5c31\u662f\u8bf4\u4eba\u7c7b\u5177\u6709\u7684\u5c5e\u6027\uff0c\u8fd9\u4e9b\u5212\u5206\u51fa\u6765\u7684\u7c7b\u540c\u6837\u5177\u6709\uff0c\u4f46\u662f\uff0c\u8fd9\u4e9b\u5212\u5206\u51fa\u6765\u7684\u7c7b\u540c\u65f6\u4e5f\u4f1a\u62e5\u6709\u4ed6\u4eec\u81ea\u5df1\u72ec\u7279\u7684\u6280\u80fd\u3002\u5728Java\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u7c7b\u7684\u5b50\u7c7b\u6765\u5b9e\u73b0\u4e0a\u9762\u7684\u8fd9\u79cd\u6548\u679c\uff1a<\/p>\n\n\n\n
        public class Person {   \/\/\u5148\u5b9a\u4e49\u4e00\u4e2a\u7236\u7c7b
            String name;
            int age;
            String sex;
        }<\/pre>\n\n\n\n
        \u63a5\u7740\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u5404\u79cd\u5404\u6837\u7684\u5b50\u7c7b\uff0c\u60f3\u8981\u7ee7\u627f\u4e00\u4e2a\u7c7b\uff0c\u6211\u4eec\u53ea\u9700\u8981\u4f7f\u7528extends<\/code>\u5173\u952e\u5b57\u5373\u53ef\uff1a<\/p>\n\n\n\n
        public class Worker extends Person{    \/\/\u5de5\u4eba\u7c7b
            
        }<\/pre>\n\n\n\n
        public class Student extends Person{   \/\/\u5b66\u751f\u7c7b
        \u200b
        }<\/pre>\n\n\n\n
        \u7c7b\u7684\u7ee7\u627f\u53ef\u4ee5\u4e0d\u65ad\u5411\u4e0b\uff0c\u4f46\u662f\u540c\u65f6\u53ea\u80fd\u7ee7\u627f\u4e00\u4e2a\u7c7b\uff0c\u540c\u65f6\uff0c\u6807\u8bb0\u4e3afinal<\/code>\u7684\u7c7b\u4e0d\u5141\u8bb8\u88ab\u7ee7\u627f\uff1a<\/p>\n\n\n\n
        public final class Person {  \/\/class\u524d\u9762\u6dfb\u52a0final\u5173\u952e\u5b57\u8868\u793a\u8fd9\u4e2a\u7c7b\u5df2\u7ecf\u662f\u6700\u7ec8\u5f62\u6001\uff0c\u4e0d\u80fd\u7ee7\u627f
          
        }<\/pre>\n\n\n\n
        \u5f53\u4e00\u4e2a\u7c7b\u7ee7\u627f\u53e6\u4e00\u4e2a\u7c7b\u65f6\uff0c\u5c5e\u6027\u4f1a\u88ab\u7ee7\u627f\uff0c\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u7236\u7c7b\u4e2d\u5b9a\u4e49\u7684\u5c5e\u6027\uff0c\u9664\u975e\u7236\u7c7b\u4e2d\u5c06\u5c5e\u6027\u7684\u8bbf\u95ee\u6743\u9650\u4fee\u6539\u4e3aprivate<\/code>\uff0c\u90a3\u4e48\u5b50\u7c7b\u5c06\u65e0\u6cd5\u8bbf\u95ee\uff08\u4f46\u662f\u4f9d\u7136\u662f\u7ee7\u627f\u4e86\u8fd9\u4e2a\u5c5e\u6027\u7684\uff09\uff1a<\/p>\n\n\n\n
        public class Student extends Person{
            public void study(){
                System.out.println(\"\u6211\u7684\u540d\u5b57\u662f \"+name+\"\uff0c\u6211\u5728\u5b66\u4e60\uff01\");   \/\/\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u7236\u7c7b\u4e2d\u5b9a\u4e49\u7684name\u5c5e\u6027
            }
        }<\/pre>\n\n\n\n
        \u540c\u6837\u7684\uff0c\u5728\u7236\u7c7b\u4e2d\u5b9a\u4e49\u7684\u65b9\u6cd5\u540c\u6837\u4f1a\u88ab\u5b50\u7c7b\u7ee7\u627f\uff1a<\/p>\n\n\n\n
        public class Person {
            String name;
            int age;
            String sex;
        \u200b
            public void hello(){
                System.out.println(\"\u6211\u53eb \"+name+\"\uff0c\u4eca\u5e74 \"+age+\" \u5c81\u4e86!\");
            }
        }<\/pre>\n\n\n\n
        \u5b50\u7c7b\u76f4\u63a5\u83b7\u5f97\u4e86\u6b64\u65b9\u6cd5\uff0c\u5f53\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u5b50\u7c7b\u5bf9\u8c61\u65f6\u5c31\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u8fd9\u4e2a\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) {
            Student student = new Student();
            student.study();    \/\/\u5b50\u7c7b\u4e0d\u4ec5\u6709\u81ea\u5df1\u7684\u72ec\u7279\u6280\u80fd
            student.hello();    \/\/\u8fd8\u7ee7\u627f\u4e86\u7236\u7c7b\u7684\u5168\u90e8\u6280\u80fd
        }<\/pre>\n\n\n\n
        \u662f\u4e0d\u662f\u611f\u89c9\u975e\u5e38\u4eba\u6027\u5316\uff0c\u5b50\u7c7b\u7ee7\u627f\u4e86\u7236\u7c7b\u7684\u5168\u90e8\u80fd\u529b\uff0c\u540c\u65f6\u8fd8\u53ef\u4ee5\u6269\u5c55\u81ea\u5df1\u7684\u72ec\u7279\u80fd\u529b\uff0c\u5c31\u50cf\u4e00\u53e5\u8bdd\u8bf4\u7684\uff1a \u9f99\u751f\u9f99\u51e4\u751f\u51e4\uff0c\u8001\u9f20\u513f\u5b50\u4f1a\u6253\u6d1e\u3002<\/p>\n\n\n\n
        \u5982\u679c\u7236\u7c7b\u5b58\u5728\u4e00\u4e2a\u6709\u53c2\u6784\u9020\u65b9\u6cd5\uff0c\u5b50\u7c7b\u5fc5\u987b\u5728\u6784\u9020\u65b9\u6cd5\u4e2d\u8c03\u7528\uff1a<\/p>\n\n\n\n
        public class Person {
            protected String name;   \/\/\u56e0\u4e3a\u5b50\u7c7b\u9700\u8981\u7528\u8fd9\u4e9b\u5c5e\u6027\uff0c\u6240\u4ee5\u8bf4\u6211\u4eec\u5c31\u5c06\u8fd9\u4e9b\u53d8\u6210protected\uff0c\u5916\u90e8\u4e0d\u5141\u8bb8\u8bbf\u95ee
            protected int age;
            protected String sex;
            protected String profession;
        \u200b
            \/\/\u6784\u9020\u65b9\u6cd5\u4e5f\u6539\u6210protected\uff0c\u53ea\u80fd\u5b50\u7c7b\u7528
            protected Person(String name, int age, String sex, String profession) {
                this.name = name;
                this.age = age;
                this.sex = sex;
                this.profession = profession;
            }
        \u200b
            public void hello(){
                System.out.println(\"[\"+profession+\"] \u6211\u53eb \"+name+\"\uff0c\u4eca\u5e74 \"+age+\" \u5c81\u4e86!\");
            }
        }<\/pre>\n\n\n\n
        \u53ef\u4ee5\u770b\u5230\uff0c\u6b64\u65f6\u4e24\u4e2a\u5b50\u7c7b\u90fd\u62a5\u9519\u4e86\uff1a<\/p>\n\n\n\n
        \"image-20220921153512798\"\/<\/div><\/figure>\n\n\n\n
        \u56e0\u4e3a\u5b50\u7c7b\u5728\u6784\u9020\u65f6\uff0c\u4e0d\u4ec5\u8981\u521d\u59cb\u5316\u5b50\u7c7b\u7684\u5c5e\u6027\uff0c\u8fd8\u9700\u8981\u521d\u59cb\u5316\u7236\u7c7b\u7684\u5c5e\u6027\uff0c\u6240\u4ee5\u8bf4\u5728\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5b50\u7c7b\u5176\u5b9e\u662f\u8c03\u7528\u4e86\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u7684\uff0c\u53ea\u662f\u5728\u65e0\u53c2\u7684\u60c5\u51b5\u4e0b\u53ef\u4ee5\u7701\u7565\uff0c\u4f46\u662f\u73b0\u5728\u7236\u7c7b\u6784\u9020\u65b9\u6cd5\u9700\u8981\u53c2\u6570\uff0c\u90a3\u4e48\u6211\u4eec\u5c31\u9700\u8981\u624b\u52a8\u6307\u5b9a\u4e86\uff1a<\/p>\n\n\n\n
        \u65e2\u7136\u73b0\u5728\u7236\u7c7b\u9700\u8981\u4e09\u4e2a\u53c2\u6570\u624d\u80fd\u6784\u9020\uff0c\u90a3\u4e48\u5b50\u7c7b\u9700\u8981\u6309\u7167\u540c\u6837\u7684\u65b9\u5f0f\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
        public class Student extends Person{
            public Student(String name, int age, String sex) {    \/\/\u56e0\u4e3a\u5b66\u751f\u804c\u4e1a\u5df2\u7ecf\u786e\u5b9a\uff0c\u6240\u4ee5\u8bf4\u5b66\u751f\u76f4\u63a5\u586b\u5199\u5c31\u53ef\u4ee5\u4e86
                super(name, age, sex, \"\u5b66\u751f\");   \/\/\u4f7f\u7528super\u4ee3\u8868\u7236\u7c7b\uff0c\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u5c31\u662fsuper()
            }
        \u200b
            public void study(){
                System.out.println(\"\u6211\u7684\u540d\u5b57\u662f \"+name+\"\uff0c\u6211\u5728\u5b66\u4e60\uff01\");
            }
        }<\/pre>\n\n\n\n
        public class Worker extends Person{
            public Worker(String name, int age, String sex) {
                super(name, age, sex, \"\u5de5\u4eba\");    \/\/\u7236\u7c7b\u6784\u9020\u8c03\u7528\u5fc5\u987b\u5728\u6700\u524d\u9762
                System.out.println(\"\u5de5\u4eba\u6784\u9020\u6210\u529f\uff01\");    \/\/\u6ce8\u610f\uff0c\u5728\u8c03\u7528\u7236\u7c7b\u6784\u9020\u65b9\u6cd5\u4e4b\u524d\uff0c\u4e0d\u5141\u8bb8\u6267\u884c\u4efb\u4f55\u4ee3\u7801\uff0c\u53ea\u80fd\u5728\u4e4b\u540e\u6267\u884c
            }
        }<\/pre>\n\n\n\n
        \u6211\u4eec\u5728\u4f7f\u7528\u5b50\u7c7b\u65f6\uff0c\u53ef\u4ee5\u5c06\u5176\u5f53\u505a\u7236\u7c7b\u6765\u4f7f\u7528\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) {
            Person person = new Student(\"\u5c0f\u660e\", 18, \"\u7537\");    \/\/\u8fd9\u91cc\u4f7f\u7528\u7236\u7c7b\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u53bb\u5f15\u7528\u4e00\u4e2a\u5b50\u7c7b\u5bf9\u8c61\uff08\u5411\u4e0a\u8f6c\u578b\uff09
            person.hello();    \/\/\u7236\u7c7b\u5bf9\u8c61\u7684\u5f15\u7528\u76f8\u5f53\u4e8e\u5f53\u505a\u7236\u7c7b\u6765\u4f7f\u7528\uff0c\u53ea\u80fd\u8bbf\u95ee\u7236\u7c7b\u5bf9\u8c61\u7684\u5185\u5bb9
        }<\/pre>\n\n\n\n
        \u867d\u7136\u6211\u4eec\u8fd9\u91cc\u4f7f\u7528\u7684\u662f\u7236\u7c7b\u7c7b\u578b\u5f15\u7528\u7684\u5bf9\u8c61\uff0c\u4f46\u662f\u8fd9\u5e76\u4e0d\u4ee3\u8868\u5b50\u7c7b\u5c31\u5f7b\u5e95\u53d8\u6210\u7236\u7c7b\u4e86\uff0c\u8fd9\u91cc\u4ec5\u4ec5\u53ea\u662f\u5f53\u505a\u7236\u7c7b\u4f7f\u7528\u800c\u5df2\u3002<\/p>\n\n\n\n
        \u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\uff0c\u5c06\u4e00\u4e2a\u88ab\u5f53\u505a\u7236\u7c7b\u4f7f\u7528\u7684\u5b50\u7c7b\u5bf9\u8c61\uff0c\u8f6c\u6362\u56de\u5b50\u7c7b\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) {
            Person person = new Student(\"\u5c0f\u660e\", 18, \"\u7537\");
            Student student = (Student) person;   \/\/\u4f7f\u7528\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\uff08\u5411\u4e0b\u8f6c\u578b\uff09
            student.study();
        }<\/pre>\n\n\n\n
        \u4f46\u662f\u6ce8\u610f\uff0c\u8fd9\u79cd\u65b9\u5f0f\u53ea\u9002\u7528\u4e8e\u8fd9\u4e2a\u5bf9\u8c61\u672c\u8eab\u5c31\u662f\u5bf9\u5e94\u7684\u5b50\u7c7b\u624d\u53ef\u4ee5\uff0c\u5982\u679c\u672c\u8eab\u90fd\u4e0d\u662f\u8fd9\u4e2a\u5b50\u7c7b\uff0c\u6216\u8005\u8bf4\u5c31\u662f\u7236\u7c7b\uff0c\u90a3\u4e48\u4f1a\u51fa\u73b0\u95ee\u9898\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) {
            Person person = new Worker(\"\u5c0f\u660e\", 18, \"\u7537\");   \/\/\u5b9e\u9645\u521b\u5efa\u7684\u662fWork\u7c7b\u578b\u7684\u5bf9\u8c61
            Student student = (Student) person;
            student.study();
        }<\/pre>\n\n\n\n
        \"image-20220921160309835\"\/<\/div><\/figure>\n\n\n\n
        \u6b64\u65f6\u76f4\u63a5\u51fa\u73b0\u4e86\u7c7b\u578b\u8f6c\u6362\u5f02\u5e38\uff0c\u56e0\u4e3a\u672c\u8eab\u4e0d\u662f\u8fd9\u4e2a\u7c7b\u578b\uff0c\u5f3a\u8f6c\u4e5f\u6ca1\u7528\u3002<\/p>\n\n\n\n
        \u90a3\u4e48\u5982\u679c\u6211\u4eec\u60f3\u8981\u5224\u65ad\u4e00\u4e0b\u67d0\u4e2a\u53d8\u91cf\u6240\u5f15\u7528\u7684\u5bf9\u8c61\u5230\u5e95\u662f\u4ec0\u4e48\u7c7b\uff0c\u90a3\u4e48\u8be5\u600e\u4e48\u529e\u5462\uff1f<\/p>\n\n\n\n
        public static void main(String[] args) {
            Person person = new Student(\"\u5c0f\u660e\", 18, \"\u7537\");
            if(person instanceof Student) {   \/\/\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528instanceof\u5173\u952e\u5b57\u6765\u5bf9\u7c7b\u578b\u8fdb\u884c\u5224\u65ad
                System.out.println(\"\u5bf9\u8c61\u662f Student \u7c7b\u578b\u7684\");
            }
            if(person instanceof Person) {
                System.out.println(\"\u5bf9\u8c61\u662f Person \u7c7b\u578b\u7684\");
            }
        }<\/pre>\n\n\n\n
        \u5982\u679c\u53d8\u91cf\u6240\u5f15\u7528\u7684\u5bf9\u8c61\u662f\u5bf9\u5e94\u7c7b\u578b\u6216\u662f\u5bf9\u5e94\u7c7b\u578b\u7684\u5b50\u7c7b\uff0c\u90a3\u4e48instanceof<\/code>\u90fd\u4f1a\u8fd4\u56detrue<\/code>\uff0c\u5426\u5219\u8fd4\u56defalse<\/code>\u3002<\/p>\n\n\n\n
        \u6700\u540e\u6211\u4eec\u9700\u8981\u6765\u7279\u522b\u8bf4\u660e\u4e00\u4e0b\uff0c\u5b50\u7c7b\u662f\u53ef\u4ee5\u5b9a\u4e49\u548c\u7236\u7c7b\u540c\u540d\u7684\u5c5e\u6027\u7684\uff1a<\/p>\n\n\n\n
        public class Worker extends Person{
            protected String name;   \/\/\u5b50\u7c7b\u4e2d\u540c\u6837\u53ef\u4ee5\u5b9a\u4e49name\u5c5e\u6027
            
            public Worker(String name, int age, String sex) {
                super(name, age, sex, \"\u5de5\u4eba\");
            }
        }<\/pre>\n\n\n\n
        \u6b64\u65f6\u7236\u7c7b\u7684name\u5c5e\u6027\u548c\u5b50\u7c7b\u7684name\u5c5e\u6027\u662f\u540c\u65f6\u5b58\u5728\u7684\uff0c\u90a3\u4e48\u5f53\u6211\u4eec\u5728\u5b50\u7c7b\u4e2d\u76f4\u63a5\u4f7f\u7528\u65f6\uff1a<\/p>\n\n\n\n
        public void work(){
            System.out.println(\"\u6211\u662f \"+name+\"\uff0c\u6211\u5728\u5de5\u4f5c\uff01\");   \/\/\u8fd9\u91cc\u7684name\uff0c\u4f9d\u7136\u662f\u4f5c\u7528\u57df\u6700\u8fd1\u7684\u54ea\u4e00\u4e2a\uff0c\u4e5f\u5c31\u662f\u5728\u5f53\u524d\u5b50\u7c7b\u4e2d\u5b9a\u4e49\u7684name\u5c5e\u6027\uff0c\u800c\u4e0d\u662f\u7236\u7c7b\u7684name\u5c5e\u6027
        }<\/pre>\n\n\n\n
        \u6240\u4ee5\u8bf4\uff0c\u6211\u4eec\u5728\u4f7f\u7528\u65f6\uff0c\u5b9e\u9645\u4e0a\u8fd9\u91cc\u5f97\u5230\u7684\u7ed3\u679c\u4e3anull<\/code>\uff1a<\/p>\n\n\n\n
        \"image-20220921160742714\"\/<\/div><\/figure>\n\n\n\n
        \u90a3\u4e48\uff0c\u5728\u5b50\u7c7b\u5b58\u5728\u540c\u540d\u53d8\u91cf\u7684\u60c5\u51b5\u4e0b\uff0c\u600e\u4e48\u53bb\u8bbf\u95ee\u7236\u7c7b\u7684\u5462\uff1f\u6211\u4eec\u540c\u6837\u53ef\u4ee5\u4f7f\u7528super<\/code>\u5173\u952e\u5b57\u6765\u8868\u793a\u7236\u7c7b\uff1a<\/p>\n\n\n\n
        public void work(){
            System.out.println(\"\u6211\u662f \"+super.name+\"\uff0c\u6211\u5728\u5de5\u4f5c\uff01\");   \/\/\u8fd9\u91cc\u4f7f\u7528super.name\u6765\u8868\u793a\u9700\u8981\u7684\u662f\u7236\u7c7b\u7684name\u53d8\u91cf
        }<\/pre>\n\n\n\n
        \u8fd9\u6837\u5f97\u5230\u7684\u7ed3\u679c\u5c31\u4e0d\u4e00\u6837\u4e86\uff1a<\/p>\n\n\n\n
        \"image-20220921160851193\"\/<\/div><\/figure>\n\n\n\n
        \u4f46\u662f\u6ce8\u610f\uff0c\u6ca1\u6709super.super<\/code>\u8fd9\u79cd\u7528\u6cd5\uff0c\u4e5f\u5c31\u662f\u8bf4\u5982\u679c\u5b58\u5728\u591a\u7ea7\u7ee7\u627f\u7684\u8bdd\uff0c\u90a3\u4e48\u6700\u591a\u53ea\u80fd\u901a\u8fc7\u8fd9\u79cd\u65b9\u6cd5\u8bbf\u95ee\u5230\u7236\u7c7b\u7684\u5c5e\u6027\uff08\u5305\u62ec\u7ee7\u627f\u4e0b\u6765\u7684\u5c5e\u6027\uff09<\/p>\n\n\n\n
        \u9876\u5c42Object\u7c7b<\/h3>\n\n\n\n
        \u5b9e\u9645\u4e0a\u6240\u6709\u7c7b\u90fd\u9ed8\u8ba4\u7ee7\u627f\u81eaObject\u7c7b\uff0c\u9664\u975e\u624b\u52a8\u6307\u5b9a\u7ee7\u627f\u7684\u7c7b\u578b\uff0c\u4f46\u662f\u4f9d\u7136\u6539\u53d8\u4e0d\u4e86\u6700\u9876\u5c42\u7684\u7236\u7c7b\u662fObject\u7c7b\u3002\u6240\u6709\u7c7b\u90fd\u5305\u542bObject\u7c7b\u4e2d\u7684\u65b9\u6cd5\uff0c\u6bd4\u5982\uff1a<\/p>\n\n\n\n
        \"image-20220921214642969\"\/<\/div><\/figure>\n\n\n\n
        \u6211\u4eec\u53d1\u73b0\uff0c\u9664\u4e86\u6211\u4eec\u81ea\u5df1\u5728\u7c7b\u4e2d\u7f16\u5199\u7684\u65b9\u6cd5\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u8c03\u7528\u4e00\u4e9b\u5176\u4ed6\u7684\u65b9\u6cd5\uff0c\u90a3\u4e48\u8fd9\u4e9b\u65b9\u6cd5\u4e0d\u53ef\u80fd\u65e0\u7f18\u65e0\u6545\u5730\u51fa\u73b0\uff0c\u80af\u5b9a\u540c\u6837\u662f\u56e0\u4e3a\u7ee7\u627f\u5f97\u5230\u7684\uff0c\u90a3\u4e48\u8fd9\u4e9b\u65b9\u6cd5\u662f\u7ee7\u627f\u8c01\u5f97\u5230\u7684\u5462\uff1f<\/p>\n\n\n\n
        public class Person extends Object{   
        \/\/\u9664\u975e\u6211\u4eec\u624b\u52a8\u6307\u5b9a\u8981\u7ee7\u627f\u7684\u7c7b\u662f\u4ec0\u4e48\uff0c\u5b9e\u9645\u4e0a\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u6240\u6709\u7684\u7c7b\u90fd\u662f\u7ee7\u627f\u81eaObject\u7684\uff0c\u53ea\u662f\u53ef\u4ee5\u7701\u7565
        \u200b
        }<\/pre>\n\n\n\n
        \u6240\u4ee5\u8bf4\u6211\u4eec\u7684\u7ee7\u627f\u7ed3\u6784\u5dee\u4e0d\u591a\u5c31\u662f\uff1a<\/p>\n\n\n\n
        \"image-20220921214944267\"\/<\/div><\/figure>\n\n\n\n
        \u65e2\u7136\u6240\u6709\u7684\u7c7b\u90fd\u9ed8\u8ba4\u7ee7\u627f\u81eaObject\uff0c\u6211\u4eec\u6765\u770b\u770b\u8fd9\u4e2a\u7c7b\u91cc\u9762\u6709\u54ea\u4e9b\u5185\u5bb9\uff1a<\/p>\n\n\n\n
        public class Object {
        \u200b
            private static native void registerNatives();   \/\/\u6807\u8bb0\u4e3anative\u7684\u65b9\u6cd5\u662f\u672c\u5730\u65b9\u6cd5\uff0c\u5e95\u5c42\u662f\u7531C++\u5b9e\u73b0\u7684
            static {
                registerNatives();   \/\/\u8fd9\u4e2a\u7c7b\u5728\u521d\u59cb\u5316\u65f6\u4f1a\u5bf9\u7c7b\u4e2d\u5176\u4ed6\u672c\u5730\u65b9\u6cd5\u8fdb\u884c\u6ce8\u518c\uff0c\u672c\u5730\u65b9\u6cd5\u4e0d\u662f\u6211\u4eecSE\u4e2d\u9700\u8981\u5b66\u4e60\u7684\u5185\u5bb9\uff0c\u6211\u4eec\u4f1a\u5728JVM\u7bc7\u89c6\u9891\u6559\u7a0b\u4e2d\u8fdb\u884c\u4ecb\u7ecd
            }
        \u200b
            \/\/\u83b7\u53d6\u5f53\u524d\u7684\u7c7b\u578bClass\u5bf9\u8c61\uff0c\u8fd9\u4e2a\u6211\u4eec\u4f1a\u5728\u6700\u540e\u4e00\u7ae0\u7684\u53cd\u5c04\u4e2d\u8fdb\u884c\u8bb2\u89e3\uff0c\u76ee\u524d\u6682\u65f6\u4e0d\u4f1a\u7528\u5230
            public final native Class<?> getClass();
        \u200b
            \/\/\u83b7\u53d6\u5bf9\u8c61\u7684\u54c8\u5e0c\u503c\uff0c\u6211\u4eec\u4f1a\u5728\u7b2c\u4e94\u7ae0\u96c6\u5408\u7c7b\u4e2d\u4f7f\u7528\u5230\uff0c\u76ee\u524d\u5404\u4f4d\u5c0f\u4f19\u4f34\u5c31\u6682\u65f6\u7406\u89e3\u4e3a\u4f1a\u8fd4\u56de\u5bf9\u8c61\u5b58\u653e\u7684\u5185\u5b58\u5730\u5740
            public native int hashCode();
        \u200b
            \/\/\u5224\u65ad\u5f53\u524d\u5bf9\u8c61\u548c\u7ed9\u5b9a\u5bf9\u8c61\u662f\u5426\u76f8\u7b49\uff0c\u9ed8\u8ba4\u5b9e\u73b0\u662f\u76f4\u63a5\u7528\u7b49\u53f7\u5224\u65ad\uff0c\u4e5f\u5c31\u662f\u76f4\u63a5\u5224\u65ad\u662f\u5426\u4e3a\u540c\u4e00\u4e2a\u5bf9\u8c61
            public boolean equals(Object obj) {
                return (this == obj);
            }
          
            \/\/\u514b\u9686\u5f53\u524d\u5bf9\u8c61\uff0c\u53ef\u4ee5\u5c06\u590d\u5236\u4e00\u4e2a\u5b8c\u5168\u4e00\u6837\u7684\u5bf9\u8c61\u51fa\u6765\uff0c\u5305\u62ec\u5bf9\u8c61\u7684\u5404\u4e2a\u5c5e\u6027
            protected native Object clone() throws CloneNotSupportedException;
        \u200b
            \/\/\u5c06\u5f53\u524d\u5bf9\u8c61\u8f6c\u6362\u4e3aString\u7684\u5f62\u5f0f\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u683c\u5f0f\u4e3a \u5b8c\u6574\u7c7b\u540d@\u5341\u516d\u8fdb\u5236\u54c8\u5e0c\u503c
            public String toString() {
                return getClass().getName() + \"@\" + Integer.toHexString(hashCode());
            }
        \u200b
            \/\/\u5524\u9192\u4e00\u4e2a\u7b49\u5f85\u5f53\u524d\u5bf9\u8c61\u9501\u7684\u7ebf\u7a0b\uff0c\u6709\u5173\u9501\u7684\u5185\u5bb9\uff0c\u6211\u4eec\u4f1a\u5728\u7b2c\u516d\u7ae0\u591a\u7ebf\u7a0b\u90e8\u5206\u4e2d\u8bb2\u89e3\uff0c\u76ee\u524d\u6682\u65f6\u4e0d\u4f1a\u7528\u5230
            public final native void notify();
        \u200b
            \/\/\u5524\u9192\u6240\u6709\u7b49\u5f85\u5f53\u524d\u5bf9\u8c61\u9501\u7684\u7ebf\u7a0b\uff0c\u540c\u4e0a
            public final native void notifyAll();
        \u200b
            \/\/\u4f7f\u5f97\u6301\u6709\u5f53\u524d\u5bf9\u8c61\u9501\u7684\u7ebf\u7a0b\u8fdb\u5165\u7b49\u5f85\u72b6\u6001\uff0c\u540c\u4e0a
            public final native void wait(long timeout) throws InterruptedException;
        \u200b
            \/\/\u540c\u4e0a
            public final void wait(long timeout, int nanos) throws InterruptedException {
                ...
            }
        \u200b
            \/\/\u540c\u4e0a
            public final void wait() throws InterruptedException {
                ...
            }
        \u200b
            \/\/\u5f53\u5bf9\u8c61\u88ab\u5224\u5b9a\u4e3a\u5df2\u7ecf\u4e0d\u518d\u4f7f\u7528\u7684\u201c\u5783\u573e\u201d\u65f6\uff0c\u5728\u56de\u6536\u4e4b\u524d\uff0c\u4f1a\u7531JVM\u6765\u8c03\u7528\u4e00\u6b21\u6b64\u65b9\u6cd5\u8fdb\u884c\u8d44\u6e90\u91ca\u653e\u4e4b\u7c7b\u7684\u64cd\u4f5c\uff0c\u8fd9\u540c\u6837\u4e0d\u662fSE\u4e2d\u9700\u8981\u5b66\u4e60\u7684\u5185\u5bb9\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u6211\u4eec\u4f1a\u5728JVM\u7bc7\u89c6\u9891\u6559\u7a0b\u4e2d\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u76ee\u524d\u6682\u65f6\u4e0d\u4f1a\u7528\u5230
            protected void finalize() throws Throwable { }
        }<\/pre>\n\n\n\n
        \u8fd9\u91cc\u6211\u4eec\u53ef\u4ee5\u5c1d\u8bd5\u8c03\u7528\u4e00\u4e0bObject\u4e3a\u6211\u4eec\u63d0\u4f9b\u7684toString()<\/code>\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) {
            Person person = new Student(\"\u5c0f\u660e\", 18, \"\u7537\");
            String str = person.toString();
            System.out.println(str);
        }<\/pre>\n\n\n\n
        \u8fd9\u91cc\u5c31\u662f\u6309\u7167\u4e0a\u9762\u8bf4\u7684\u683c\u5f0f\u8fdb\u884c\u6253\u5370\uff1a<\/p>\n\n\n\n
        \"image-20220921221053801\"\/<\/div><\/figure>\n\n\n\n
        \u5f53\u7136\uff0c\u6211\u4eec\u76f4\u63a5\u53ef\u4ee5\u7ed9println<\/code>\u4f20\u5165\u4e00\u4e2aObject\u7c7b\u578b\u7684\u5bf9\u8c61\uff1a<\/p>\n\n\n\n
        public void println(Object x) {
            String s = String.valueOf(x);   \/\/\u8fd9\u91cc\u540c\u6837\u4f1a\u8c03\u7528\u5bf9\u8c61\u7684toString\u65b9\u6cd5\uff0c\u6240\u4ee5\u8bf4\u8ddf\u4e0a\u9762\u6548\u679c\u662f\u4e00\u6837\u7684
            synchronized (this) {
                print(s);
                newLine();
            }
        }<\/pre>\n\n\n\n
        \u6709\u5c0f\u4f19\u4f34\u80af\u5b9a\u4f1a\u597d\u5947\uff0c\u8fd9\u91cc\u4e0d\u662f\u63a5\u53d7\u7684\u4e00\u4e2aObject\u7c7b\u578b\u7684\u503c\u7684\uff0c\u4e3a\u4ec0\u4e48\u4efb\u610f\u7c7b\u578b\u90fd\u53ef\u4ee5\u4f20\u5165\u5462\uff1f\u56e0\u4e3a\u6240\u6709\u7c7b\u578b\u90fd\u662f\u7ee7\u627f\u81eaObject\uff0c\u5982\u679c\u65b9\u6cd5\u63a5\u53d7\u7684\u53c2\u6570\u662f\u4e00\u4e2a\u5f15\u7528\u7c7b\u578b\u7684\u503c\uff0c\u90a3\u53ea\u8981\u662f\u8fd9\u4e2a\u7c7b\u7684\u5bf9\u8c61\u6216\u662f\u8fd9\u4e2a\u7c7b\u7684\u5b50\u7c7b\u7684\u5bf9\u8c61\uff0c\u90fd\u53ef\u4ee5\u4f5c\u4e3a\u53c2\u6570\u4f20\u5165\u3002<\/p>\n\n\n\n
        \u6211\u4eec\u4e5f\u53ef\u4ee5\u8bd5\u8bd5\u770b\u9ed8\u8ba4\u63d0\u4f9b\u7684equals<\/code>\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) {
            Person p1 = new Student(\"\u5c0f\u660e\", 18, \"\u7537\");
            Person p2 = new Student(\"\u5c0f\u660e\", 18, \"\u7537\");
            System.out.println(p1.equals(p2));
        }<\/pre>\n\n\n\n
        \u56e0\u4e3a\u9ed8\u8ba4\u6bd4\u8f83\u7684\u662f\u4e24\u4e2a\u5bf9\u8c61\u662f\u5426\u4e3a\u540c\u4e00\u4e2a\u5bf9\u8c61\uff0c\u6240\u4ee5\u8bf4\u8fd9\u91cc\u5f97\u5230\u7684\u80af\u5b9a\u662ffalse\uff0c\u4f46\u662f\u6709\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5b9e\u9645\u4e0a\u6211\u4eec\u6240\u5e0c\u671b\u7684\u60c5\u51b5\u662f\u5982\u679c\u540d\u5b57\u3001\u5e74\u9f84\u3001\u6027\u522b\u90fd\u5b8c\u5168\u76f8\u540c\uff0c\u90a3\u4e48\u8fd9\u80af\u5b9a\u662f\u540c\u4e00\u4e2a\u4eba\uff0c\u4f46\u662f\u8fd9\u91cc\u5374\u505a\u4e0d\u5230\u8fd9\u6837\u7684\u5224\u65ad\uff0c\u6211\u4eec\u9700\u8981\u4fee\u6539\u4e00\u4e0bequals<\/code>\u65b9\u6cd5\u7684\u9ed8\u8ba4\u5b9e\u73b0\u6765\u5b8c\u6210\uff0c\u8fd9\u5c31\u8981\u7528\u5230\u65b9\u6cd5\u7684\u91cd\u5199\u4e86\u3002<\/p>\n\n\n\n
        \u65b9\u6cd5\u7684\u91cd\u5199<\/h3>\n\n\n\n
        \u6ce8\u610f\uff0c\u65b9\u6cd5\u7684\u91cd\u5199\u4e0d\u540c\u4e8e\u4e4b\u524d\u7684\u65b9\u6cd5\u91cd\u8f7d\uff0c\u4e0d\u8981\u641e\u6df7\u4e86\uff0c\u65b9\u6cd5\u7684\u91cd\u8f7d\u662f\u4e3a\u67d0\u4e2a\u65b9\u6cd5\u63d0\u4f9b\u66f4\u591a\u79cd\u7c7b\uff0c\u800c\u65b9\u6cd5\u7684\u91cd\u5199\u662f\u8986\u76d6\u539f\u6709\u7684\u65b9\u6cd5\u5b9e\u73b0\uff0c\u6bd4\u5982\u6211\u4eec\u73b0\u5728\u4e0d\u5e0c\u671b\u4f7f\u7528Object\u7c7b\u4e2d\u63d0\u4f9b\u7684equals<\/code>\u65b9\u6cd5\uff0c\u90a3\u4e48\u6211\u4eec\u5c31\u53ef\u4ee5\u5c06\u5176\u91cd\u5199\u4e86\uff1a<\/p>\n\n\n\n
        public class Person{
            ...
        \u200b
            @Override   \/\/\u91cd\u5199\u65b9\u6cd5\u53ef\u4ee5\u6dfb\u52a0 @Override \u6ce8\u89e3\uff0c\u6709\u5173\u6ce8\u89e3\u6211\u4eec\u4f1a\u5728\u6700\u540e\u4e00\u7ae0\u8fdb\u884c\u4ecb\u7ecd\uff0c\u8fd9\u4e2a\u6ce8\u89e3\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u53ef\u4ee5\u7701\u7565
            public boolean equals(Object obj) {   \/\/\u91cd\u5199\u65b9\u6cd5\u8981\u6c42\u4e0e\u7236\u7c7b\u7684\u5b9a\u4e49\u5b8c\u5168\u4e00\u81f4
                if(obj == null) return false;   \/\/\u5982\u679c\u4f20\u5165\u7684\u5bf9\u8c61\u4e3anull\uff0c\u90a3\u80af\u5b9a\u4e0d\u76f8\u7b49
                if(obj instanceof Person) {     \/\/\u53ea\u6709\u662f\u5f53\u524d\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u624d\u80fd\u8fdb\u884c\u6bd4\u8f83\uff0c\u8981\u662f\u90fd\u4e0d\u662f\u8fd9\u4e2a\u7c7b\u578b\u8fd8\u6bd4\u4ec0\u4e48
                    Person person = (Person) obj;   \/\/\u5148\u8f6c\u6362\u4e3a\u5f53\u524d\u7c7b\u578b\uff0c\u63a5\u7740\u6211\u4eec\u5bf9\u4e09\u4e2a\u5c5e\u6027\u6328\u4e2a\u8fdb\u884c\u6bd4\u8f83
                    return this.name.equals(person.name) &&    \/\/\u5b57\u7b26\u4e32\u5185\u5bb9\u7684\u6bd4\u8f83\uff0c\u4e0d\u80fd\u4f7f\u7528==\uff0c\u5fc5\u987b\u4f7f\u7528equals\u65b9\u6cd5
                            this.age == person.age &&       \/\/\u57fa\u672c\u7c7b\u578b\u7684\u6bd4\u8f83\u8ddf\u4e4b\u524d\u4e00\u6837\uff0c\u76f4\u63a5==
                            this.sex.equals(person.sex);
                }
                return false;
            }
        }<\/pre>\n\n\n\n
        \u5728\u91cd\u5199Object\u63d0\u4f9b\u7684equals<\/code>\u65b9\u6cd5\u4e4b\u540e\uff0c\u5c31\u4f1a\u6309\u7167\u6211\u4eec\u7684\u65b9\u5f0f\u8fdb\u884c\u5224\u65ad\u4e86\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) {
            Person p1 = new Student(\"\u5c0f\u660e\", 18, \"\u7537\");
            Person p2 = new Student(\"\u5c0f\u660e\", 18, \"\u7537\");
            System.out.println(p1.equals(p2));   \/\/\u6b64\u65f6\u7531\u4e8e\u4e09\u4e2a\u5c5e\u6027\u5b8c\u5168\u4e00\u81f4\uff0c\u6240\u4ee5\u8bf4\u5224\u65ad\u7ed3\u679c\u4e3a\u771f\uff0c\u5373\u4f7f\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u5bf9\u8c61
        }<\/pre>\n\n\n\n
        \u6709\u65f6\u5019\u4e3a\u4e86\u65b9\u4fbf\u67e5\u770b\u5bf9\u8c61\u7684\u5404\u4e2a\u5c5e\u6027\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06Object\u7c7b\u63d0\u4f9b\u7684toString<\/code>\u65b9\u6cd5\u91cd\u5199\u4e86\uff1a<\/p>\n\n\n\n
        @Override
        public String toString() {    \/\/\u4f7f\u7528IDEA\u53ef\u4ee5\u5feb\u901f\u751f\u6210
            return \"Person{\" +
                    \"name='\" + name + '\\'' +
                    \", age=\" + age +
                    \", sex='\" + sex + '\\'' +
                    \", profession='\" + profession + '\\'' +
                    '}';
        }<\/pre>\n\n\n\n
        \u8fd9\u6837\uff0c\u6211\u4eec\u76f4\u63a5\u6253\u5370\u5bf9\u8c61\u65f6\uff0c\u5c31\u4f1a\u6253\u5370\u51fa\u5bf9\u8c61\u7684\u5404\u4e2a\u5c5e\u6027\u503c\u4e86\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) {
            Person person = new Student(\"\u5c0f\u660e\", 18, \"\u7537\");
            System.out.println(person);
        }<\/pre>\n\n\n\n
        \"image-20220921223249343\"\/<\/div><\/figure>\n\n\n\n
        \u6ce8\u610f\uff0c\u9759\u6001\u65b9\u6cd5\u4e0d\u652f\u6301\u91cd\u5199\uff0c\u56e0\u4e3a\u5b83\u662f\u5c5e\u4e8e\u7c7b\u672c\u8eab\u7684\uff0c\u4f46\u662f\u5b83\u53ef\u4ee5\u88ab\u7ee7\u627f\u3002<\/p>\n\n\n\n
        \u57fa\u4e8e\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u91cd\u5199\u7684\u7279\u6027\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u7c7b\u5b9a\u4e49\u7684\u884c\u4e3a\uff0c\u4e0d\u540c\u7684\u5b50\u7c7b\u53ef\u4ee5\u51fa\u73b0\u4e0d\u540c\u7684\u884c\u4e3a\uff0c\u6bd4\u5982\u8003\u8bd5\uff0c\u5b66\u751f\u8003\u8bd5\u53ef\u4ee5\u5f97\u5230A\uff0c\u800c\u5de5\u4eba\u53bb\u8003\u8bd5\u53ea\u80fd\u5f97\u5230D\uff1a<\/p>\n\n\n\n
        public class Person {
            ...
        \u200b
            public void exam(){
                System.out.println(\"\u6211\u662f\u8003\u8bd5\u65b9\u6cd5\");
            }
          
            ...
        }<\/pre>\n\n\n\n
        public class Student extends Person{
            ...
        \u200b
            @Override
            public void exam() {
                System.out.println(\"\u6211\u662f\u5b66\u751f\uff0c\u6211\u5c31\u662f\u5c0f\u9547\u505a\u9898\u5bb6\uff0c\u62ff\u4e2a A \u8f7b\u8f7b\u677e\u677e\");
            }
        }<\/pre>\n\n\n\n
        public class Worker extends Person{
            ...
        \u200b
            @Override
            public void exam() {
                System.out.println(\"\u6211\u662f\u5de5\u4eba\uff0c\u505a\u9898\u6211\u5e76\u4e0d\u64c5\u957f\uff0c\u53ea\u80fd\u5f97\u5230 D\");
            }
        }<\/pre>\n\n\n\n
        \u8fd9\u6837\uff0c\u4e0d\u540c\u7684\u5b50\u7c7b\uff0c\u5bf9\u4e8e\u540c\u4e00\u4e2a\u65b9\u6cd5\u4f1a\u4ea7\u751f\u4e0d\u540c\u7684\u7ed3\u679c\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) {
            Person person = new Student(\"\u5c0f\u660e\", 18, \"\u7537\");
            person.exam();
        \u200b
            person = new Worker(\"\u5c0f\u5f3a\", 18, \"\u7537\");
            person.exam();
        }<\/pre>\n\n\n\n
        \"image-20220921224525855\"\/<\/div><\/figure>\n\n\n\n
        \u8fd9\u5176\u5b9e\u5c31\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u591a\u6001\u7279\u6027\u7684\u4e00\u79cd\u4f53\u73b0\u3002<\/p>\n\n\n\n
        \u6ce8\u610f\uff0c\u6211\u4eec\u5982\u679c\u4e0d\u5e0c\u671b\u5b50\u7c7b\u91cd\u5199\u67d0\u4e2a\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u65b9\u6cd5\u524d\u6dfb\u52a0final<\/code>\u5173\u952e\u5b57\uff0c\u8868\u793a\u8fd9\u4e2a\u65b9\u6cd5\u5df2\u7ecf\u662f\u6700\u7ec8\u5f62\u6001\uff1a<\/p>\n\n\n\n
        public final void exam(){
            System.out.println(\"\u6211\u662f\u8003\u8bd5\u65b9\u6cd5\");
        }<\/pre>\n\n\n\n
        \"image-20220921224907373\"\/<\/div><\/figure>\n\n\n\n
        \u6216\u8005\uff0c\u5982\u679c\u7236\u7c7b\u4e2d\u65b9\u6cd5\u7684\u53ef\u89c1\u6027\u4e3aprivate<\/code>\uff0c\u90a3\u4e48\u5b50\u7c7b\u540c\u6837\u65e0\u6cd5\u8bbf\u95ee\uff0c\u4e5f\u5c31\u4e0d\u80fd\u91cd\u5199\uff0c\u4f46\u662f\u53ef\u4ee5\u5b9a\u4e49\u540c\u540d\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
        \"image-20220921225651487\"\/<\/div><\/figure>\n\n\n\n
        \u867d\u7136\u8fd9\u91cc\u53ef\u4ee5\u7f16\u8bd1\u901a\u8fc7\uff0c\u4f46\u662f\u5e76\u4e0d\u662f\u5bf9\u7236\u7c7b\u65b9\u6cd5\u7684\u91cd\u5199\uff0c\u4ec5\u4ec5\u662f\u5b50\u7c7b\u81ea\u5df1\u521b\u5efa\u7684\u4e00\u4e2a\u65b0\u65b9\u6cd5\u3002<\/p>\n\n\n\n
        \u8fd8\u6709\uff0c\u6211\u4eec\u5728\u91cd\u5199\u7236\u7c7b\u65b9\u6cd5\u65f6\uff0c\u5982\u679c\u5e0c\u671b\u8c03\u7528\u7236\u7c7b\u539f\u672c\u7684\u65b9\u6cd5\u5b9e\u73b0\uff0c\u90a3\u4e48\u540c\u6837\u53ef\u4ee5\u4f7f\u7528super<\/code>\u5173\u952e\u5b57\uff1a<\/p>\n\n\n\n
        @Override
        public void exam() {
            super.exam();   \/\/\u8c03\u7528\u7236\u7c7b\u7684\u5b9e\u73b0
            System.out.println(\"\u6211\u662f\u5de5\u4eba\uff0c\u505a\u9898\u6211\u5e76\u4e0d\u64c5\u957f\uff0c\u53ea\u80fd\u5f97\u5230 D\");
        }<\/pre>\n\n\n\n
        \u7136\u540e\u5c31\u662f\u8bbf\u95ee\u6743\u9650\u7684\u95ee\u9898\uff0c\u5b50\u7c7b\u5728\u91cd\u5199\u7236\u7c7b\u65b9\u6cd5\u65f6\uff0c\u4e0d\u80fd\u964d\u4f4e\u7236\u7c7b\u65b9\u6cd5\u4e2d\u7684\u53ef\u89c1\u6027\uff1a<\/p>\n\n\n\n
        public void exam(){
            System.out.println(\"\u6211\u662f\u8003\u8bd5\u65b9\u6cd5\");
        }<\/pre>\n\n\n\n
        \"image-20220921225234226\"\/<\/div><\/figure>\n\n\n\n
        \u56e0\u4e3a\u5b50\u7c7b\u5b9e\u9645\u4e0a\u53ef\u4ee5\u5f53\u505a\u7236\u7c7b\u4f7f\u7528\uff0c\u5982\u679c\u5b50\u7c7b\u7684\u8bbf\u95ee\u6743\u9650\u6bd4\u7236\u7c7b\u8fd8\u4f4e\uff0c\u90a3\u4e48\u5728\u88ab\u5f53\u505a\u7236\u7c7b\u4f7f\u7528\u65f6\uff0c\u5c31\u53ef\u80fd\u51fa\u73b0\u65e0\u89c6\u8bbf\u95ee\u6743\u9650\u8c03\u7528\u7684\u60c5\u51b5\uff0c\u8fd9\u6837\u80af\u5b9a\u662f\u4e0d\u884c\u7684\uff0c\u4f46\u662f\u76f8\u53cd\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u5b50\u7c7b\u4e2d\u63d0\u5347\u6743\u9650\uff1a<\/p>\n\n\n\n
        protected void exam(){
            System.out.println(\"\u6211\u662f\u8003\u8bd5\u65b9\u6cd5\");
        }<\/pre>\n\n\n\n
        @Override
        public void exam() {   \/\/\u5c06\u53ef\u89c1\u6027\u63d0\u5347\u4e3apublic 
            System.out.println(\"\u6211\u662f\u5de5\u4eba\uff0c\u505a\u9898\u6211\u5e76\u4e0d\u64c5\u957f\uff0c\u53ea\u80fd\u5f97\u5230 D\");
        }<\/pre>\n\n\n\n
        \"image-20220921225840122\"\/<\/div><\/figure>\n\n\n\n
        \u53ef\u4ee5\u770b\u5230\u4f5c\u4e3a\u5b50\u7c7b\u65f6\u5c31\u53ef\u4ee5\u6b63\u5e38\u8c03\u7528\uff0c\u4f46\u662f\u5982\u679c\u5c06\u5176\u4f5c\u4e3a\u7236\u7c7b\u4f7f\u7528\uff0c\u56e0\u4e3a\u8bbf\u95ee\u6743\u9650\u4e0d\u8db3\u6240\u6709\u5c31\u65e0\u6cd5\u4f7f\u7528\uff0c\u603b\u4e4b\uff0c\u5b50\u7c7b\u91cd\u5199\u7684\u65b9\u6cd5\u6743\u9650\u4e0d\u80fd\u6bd4\u7236\u7c7b\u8fd8\u4f4e\u3002<\/p>\n\n\n\n
        \u62bd\u8c61\u7c7b<\/h3>\n\n\n\n
        \u5728\u6211\u4eec\u5b66\u4e60\u4e86\u7c7b\u7684\u7ee7\u627f\u4e4b\u540e\uff0c\u5b9e\u9645\u4e0a\u6211\u4eec\u4f1a\u53d1\u73b0\uff0c\u8d8a\u662f\u5904\u4e8e\u9876\u5c42\u5b9a\u4e49\u7684\u7c7b\uff0c\u5b9e\u9645\u4e0a\u53ef\u4ee5\u8fdb\u4e00\u6b65\u5730\u8fdb\u884c\u62bd\u8c61\uff0c\u6bd4\u5982\u6211\u4eec\u524d\u9762\u7f16\u5199\u7684\u8003\u8bd5\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
        protected void exam(){
            System.out.println(\"\u6211\u662f\u8003\u8bd5\u65b9\u6cd5\");
        }<\/pre>\n\n\n\n
        \u8fd9\u4e2a\u65b9\u6cd5\u518d\u5b50\u7c7b\u4e2d\u4e00\u5b9a\u4f1a\u88ab\u91cd\u5199\uff0c\u6240\u4ee5\u8bf4\u9664\u975e\u5b50\u7c7b\u4e2d\u8c03\u7528\u7236\u7c7b\u7684\u5b9e\u73b0\uff0c\u5426\u5219\u4e00\u822c\u60c5\u51b5\u4e0b\u6c38\u8fdc\u90fd\u4e0d\u4f1a\u88ab\u8c03\u7528\uff0c\u5c31\u50cf\u6211\u4eec\u8bf4\u4e00\u4e2a\u4eba\u4f1a\u4e0d\u4f1a\u8003\u8bd5\u4e00\u6837\uff0c\u5b9e\u9645\u4e0a\u4eba\u600e\u4e48\u8003\u8bd5\u662f\u4e00\u4e2a\u62bd\u8c61\u7684\u6982\u5ff5\uff0c\u800c\u5b66\u751f\u600e\u4e48\u8003\u8bd5\u548c\u5de5\u4eba\u600e\u4e48\u8003\u8bd5\uff0c\u624d\u662f\u5177\u4f53\u7684\u4e00\u4e2a\u5b9e\u73b0\uff0c\u6240\u4ee5\u8bf4\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4eba\u7c7b\u8fdb\u884c\u8fdb\u4e00\u6b65\u7684\u62bd\u8c61\uff0c\u8ba9\u67d0\u4e9b\u65b9\u6cd5\u5b8c\u5168\u7531\u5b50\u7c7b\u6765\u5b9e\u73b0\uff0c\u7236\u7c7b\u4e2d\u4e0d\u9700\u8981\u63d0\u4f9b\u5b9e\u73b0\u3002<\/p>\n\n\n\n
        \u8981\u5b9e\u73b0\u8fd9\u6837\u7684\u64cd\u4f5c\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4eba\u7c7b\u53d8\u6210\u62bd\u8c61\u7c7b\uff0c\u62bd\u8c61\u7c7b\u6bd4\u7c7b\u8fd8\u8981\u62bd\u8c61\uff1a<\/p>\n\n\n\n
        public abstract class Person {   \/\/\u901a\u8fc7\u6dfb\u52a0abstract\u5173\u952e\u5b57\uff0c\u8868\u793a\u8fd9\u4e2a\u7c7b\u662f\u4e00\u4e2a\u62bd\u8c61\u7c7b
            protected String name;   \/\/\u5927\u4f53\u5185\u5bb9\u5176\u5b9e\u666e\u901a\u7c7b\u5dee\u4e0d\u591a
            protected int age;
            protected String sex;
            protected String profession;
        \u200b
            protected Person(String name, int age, String sex, String profession) {
                this.name = name;
                this.age = age;
                this.sex = sex;
                this.profession = profession;
            }
        \u200b
            public abstract void exam();   \/\/\u62bd\u8c61\u7c7b\u4e2d\u53ef\u4ee5\u5177\u6709\u62bd\u8c61\u65b9\u6cd5\uff0c\u4e5f\u5c31\u662f\u8bf4\u8fd9\u4e2a\u65b9\u6cd5\u53ea\u6709\u5b9a\u4e49\uff0c\u6ca1\u6709\u65b9\u6cd5\u4f53
        }<\/pre>\n\n\n\n
        \u800c\u5177\u4f53\u7684\u5b9e\u73b0\uff0c\u9700\u8981\u7531\u5b50\u7c7b\u6765\u5b8c\u6210\uff0c\u800c\u4e14\u5982\u679c\u662f\u5b50\u7c7b\uff0c\u5fc5\u987b\u8981\u5b9e\u73b0\u62bd\u8c61\u7c7b\u4e2d\u6240\u6709\u62bd\u8c61\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
        public class Worker extends Person{
        \u200b
            public Worker(String name, int age, String sex) {
                super(name, age, sex, \"\u5de5\u4eba\");
            }
        \u200b
            @Override
            public void exam() {   \/\/\u5b50\u7c7b\u5fc5\u987b\u8981\u5b9e\u73b0\u62bd\u8c61\u7c7b\u6240\u6709\u7684\u62bd\u8c61\u65b9\u6cd5\uff0c\u8fd9\u662f\u5f3a\u5236\u8981\u6c42\u7684\uff0c\u5426\u5219\u4f1a\u65e0\u6cd5\u901a\u8fc7\u7f16\u8bd1
                System.out.println(\"\u6211\u662f\u5de5\u4eba\uff0c\u505a\u9898\u6211\u5e76\u4e0d\u64c5\u957f\uff0c\u53ea\u80fd\u5f97\u5230 D\");
            }
        }<\/pre>\n\n\n\n
        \u62bd\u8c61\u7c7b\u7531\u4e8e\u4e0d\u662f\u5177\u4f53\u7684\u7c7b\u5b9a\u4e49\uff08\u5b83\u662f\u7c7b\u7684\u62bd\u8c61\uff09\u53ef\u80fd\u4f1a\u5b58\u5728\u67d0\u4e9b\u65b9\u6cd5\u6ca1\u6709\u5b9e\u73b0\uff0c\u56e0\u6b64\u65e0\u6cd5\u76f4\u63a5\u901a\u8fc7new\u5173\u952e\u5b57\u6765\u76f4\u63a5\u521b\u5efa\u5bf9\u8c61\uff1a<\/p>\n\n\n\n
        \"image-20220921231744420\"\/<\/div><\/figure>\n\n\n\n
        \u8981\u4f7f\u7528\u62bd\u8c61\u7c7b\uff0c\u6211\u4eec\u53ea\u80fd\u53bb\u521b\u5efa\u5b83\u7684\u5b50\u7c7b\u5bf9\u8c61\u3002<\/p>\n\n\n\n
        \u62bd\u8c61\u7c7b\u4e00\u822c\u53ea\u7528\u4f5c\u7ee7\u627f\u4f7f\u7528\uff0c\u5f53\u7136\uff0c\u62bd\u8c61\u7c7b\u7684\u5b50\u7c7b\u4e5f\u53ef\u4ee5\u662f\u4e00\u4e2a\u62bd\u8c61\u7c7b\uff1a<\/p>\n\n\n\n
        public abstract class Student extends Person{   \/\/\u5982\u679c\u62bd\u8c61\u7c7b\u7684\u5b50\u7c7b\u4e5f\u662f\u62bd\u8c61\u7c7b\uff0c\u90a3\u4e48\u53ef\u4ee5\u4e0d\u7528\u5b9e\u73b0\u7236\u7c7b\u4e2d\u7684\u62bd\u8c61\u65b9\u6cd5
            public Student(String name, int age, String sex) {
                super(name, age, sex, \"\u5b66\u751f\");
            }
        \u200b
            @Override   \/\/\u62bd\u8c61\u7c7b\u4e2d\u5e76\u4e0d\u662f\u53ea\u80fd\u6709\u62bd\u8c61\u65b9\u6cd5\uff0c\u62bd\u8c61\u7c7b\u4e2d\u4e5f\u53ef\u4ee5\u6709\u6b63\u5e38\u65b9\u6cd5\u7684\u5b9e\u73b0
            public void exam() {
                System.out.println(\"\u6211\u662f\u5b66\u751f\uff0c\u6211\u5c31\u662f\u5c0f\u9547\u505a\u9898\u5bb6\uff0c\u62ff\u4e2a A \u8f7b\u8f7b\u677e\u677e\");
            }
        }<\/pre>\n\n\n\n
        \u6ce8\u610f\uff0c\u62bd\u8c61\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\u4e0d\u80fd\u4e3aprivate<\/code>\uff1a<\/p>\n\n\n\n
        \"image-20220921232435056\"\/<\/div><\/figure>\n\n\n\n
        \u56e0\u4e3a\u62bd\u8c61\u65b9\u6cd5\u4e00\u5b9a\u8981\u7531\u5b50\u7c7b\u5b9e\u73b0\uff0c\u5982\u679c\u5b50\u7c7b\u90fd\u8bbf\u95ee\u4e0d\u4e86\uff0c\u90a3\u4e48\u8fd8\u6709\u4ec0\u4e48\u610f\u4e49\u5462\uff1f\u6240\u4ee5\u8bf4\u4e0d\u80fd\u4e3a\u79c1\u6709\u3002<\/p>\n\n\n\n
        \u63a5\u53e3<\/h3>\n\n\n\n
        \u63a5\u53e3\u751a\u81f3\u6bd4\u62bd\u8c61\u7c7b\u8fd8\u62bd\u8c61\uff0c\u4ed6\u53ea\u4ee3\u8868\u67d0\u4e2a\u786e\u5207\u7684\u529f\u80fd\uff01\u4e5f\u5c31\u662f\u53ea\u5305\u542b\u65b9\u6cd5\u7684\u5b9a\u4e49\uff0c\u751a\u81f3\u90fd\u4e0d\u662f\u4e00\u4e2a\u7c7b\uff01\u63a5\u53e3\u4e00\u822c\u53ea\u4ee3\u8868\u67d0\u4e9b\u529f\u80fd\u7684\u62bd\u8c61\uff0c\u63a5\u53e3\u5305\u542b\u4e86\u4e00\u4e9b\u5217\u65b9\u6cd5\u7684\u5b9a\u4e49\uff0c\u7c7b\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u4e2a\u63a5\u53e3\uff0c\u8868\u793a\u7c7b\u652f\u6301\u63a5\u53e3\u4ee3\u8868\u7684\u529f\u80fd\uff08\u7c7b\u4f3c\u4e8e\u4e00\u4e2a\u63d2\u4ef6\uff0c\u53ea\u80fd\u4f5c\u4e3a\u4e00\u4e2a\u9644\u5c5e\u529f\u80fd\u52a0\u5728\u4e3b\u4f53\u4e0a\uff0c\u540c\u65f6\u5177\u4f53\u5b9e\u73b0\u8fd8\u9700\u8981\u7531\u4e3b\u4f53\u6765\u5b9e\u73b0\uff09<\/p>\n\n\n\n
        \u548b\u4e00\u770b\uff0c\u8fd9\u5565\u610f\u601d\u554a\uff0c\u4ec0\u4e48\u53eb\u652f\u6301\u63a5\u53e3\u4ee3\u8868\u7684\u529f\u80fd\uff1f\u5b9e\u9645\u4e0a\u63a5\u53e3\u7684\u76ee\u6807\u5c31\u662f\u5c06\u7c7b\u6240\u5177\u6709\u67d0\u4e9b\u7684\u884c\u4e3a\u62bd\u8c61\u51fa\u6765\u3002<\/p>\n\n\n\n
        \u6bd4\u5982\u8bf4\uff0c\u5bf9\u4e8e\u4eba\u7c7b\u7684\u4e0d\u540c\u5b50\u7c7b\uff0c\u5b66\u751f\u548c\u8001\u5e08\u6765\u8bf4\uff0c\u4ed6\u4eec\u90fd\u5177\u6709\u5b66\u4e60\u8fd9\u4e2a\u80fd\u529b\uff0c\u65e2\u7136\u90fd\u6709\uff0c\u90a3\u4e48\u6211\u4eec\u5c31\u53ef\u4ee5\u5c06\u5b66\u4e60\u8fd9\u4e2a\u80fd\u529b\uff0c\u62bd\u8c61\u6210\u63a5\u53e3\u6765\u8fdb\u884c\u4f7f\u7528\uff0c\u53ea\u8981\u662f\u5b9e\u73b0\u8fd9\u4e2a\u63a5\u53e3\u7684\u7c7b\uff0c\u90fd\u6709\u5b66\u4e60\u7684\u80fd\u529b\uff1a<\/p>\n\n\n\n
        public interface Study {    \/\/\u4f7f\u7528interface\u8868\u793a\u8fd9\u662f\u4e00\u4e2a\u63a5\u53e3
            void study();    \/\/\u63a5\u53e3\u4e2d\u53ea\u80fd\u5b9a\u4e49\u8bbf\u95ee\u6743\u9650\u4e3apublic\u62bd\u8c61\u65b9\u6cd5\uff0c\u5176\u4e2dpublic\u548cabstract\u5173\u952e\u5b57\u53ef\u4ee5\u7701\u7565
        }<\/pre>\n\n\n\n
        \u6211\u4eec\u53ef\u4ee5\u8ba9\u7c7b\u5b9e\u73b0\u8fd9\u4e2a\u63a5\u53e3\uff1a<\/p>\n\n\n\n
        public class Student extends Person implements Study {   \/\/\u4f7f\u7528implements\u5173\u952e\u5b57\u6765\u5b9e\u73b0\u63a5\u53e3
            public Student(String name, int age, String sex) {
                super(name, age, sex, \"\u5b66\u751f\");
            }
        \u200b
            @Override
            public void study() {    \/\/\u5b9e\u73b0\u63a5\u53e3\u65f6\uff0c\u540c\u6837\u9700\u8981\u5c06\u63a5\u53e3\u4e2d\u6240\u6709\u7684\u62bd\u8c61\u65b9\u6cd5\u5168\u90e8\u5b9e\u73b0
                System.out.println(\"\u6211\u4f1a\u5b66\u4e60\uff01\");
            }
        }<\/pre>\n\n\n\n
        public class Teacher extends Person implements Study {
            protected Teacher(String name, int age, String sex) {
                super(name, age, sex, \"\u6559\u5e08\");
            }
        \u200b
            @Override
            public void study() {
                System.out.println(\"\u6211\u4f1a\u52a0\u500d\u5b66\u4e60\uff01\");
            }
        }<\/pre>\n\n\n\n
        \u63a5\u53e3\u4e0d\u540c\u4e8e\u7ee7\u627f\uff0c\u63a5\u53e3\u53ef\u4ee5\u540c\u65f6\u5b9e\u73b0\u591a\u4e2a\uff1a<\/p>\n\n\n\n
        public class Student extends Person implements Study, A, B, C {  \/\/\u591a\u4e2a\u63a5\u53e3\u7684\u5b9e\u73b0\u4f7f\u7528\u9017\u53f7\u9694\u5f00
          
        }<\/pre>\n\n\n\n
        \u6240\u4ee5\u8bf4\u6709\u4e9b\u4eba\u8bf4\u63a5\u53e3\u5176\u5b9e\u5c31\u662fJava\u4e2d\u7684\u591a\u7ee7\u627f\uff0c\u4f46\u662f\u6211\u4e2a\u4eba\u8ba4\u4e3a\u8fd9\u79cd\u8bf4\u6cd5\u662f\u9519\u7684\uff0c\u5b9e\u9645\u4e0a\u5b9e\u73b0\u63a5\u53e3\u66f4\u50cf\u662f\u4e00\u4e2a\u7c7b\u7684\u529f\u80fd\u5217\u8868\uff0c\u4f5c\u4e3a\u9644\u52a0\u529f\u80fd\u5b58\u5728\uff0c\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u9644\u52a0\u5f88\u591a\u4e2a\u529f\u80fd\uff0c\u63a5\u53e3\u7684\u4f7f\u7528\u548c\u7ee7\u627f\u7684\u6982\u5ff5\u6709\u4e00\u5b9a\u7684\u51fa\u5165\uff0c\u9876\u591a\u8bf4\u662f\u591a\u7ee7\u627f\u7684\u4e00\u79cd\u66ff\u4ee3\u65b9\u6848\u3002<\/p>\n\n\n\n
        \u63a5\u53e3\u8ddf\u62bd\u8c61\u7c7b\u4e00\u6837\uff0c\u4e0d\u80fd\u76f4\u63a5\u521b\u5efa\u5bf9\u8c61\uff0c\u4f46\u662f\u6211\u4eec\u4e5f\u53ef\u4ee5\u5c06\u63a5\u53e3\u5b9e\u73b0\u7c7b\u7684\u5bf9\u8c61\u4ee5\u63a5\u53e3\u7684\u5f62\u5f0f\u53bb\u4f7f\u7528\uff1a<\/p>\n\n\n\n
        \"image-20220921234735828\"\/<\/div><\/figure>\n\n\n\n
        \u5f53\u505a\u63a5\u53e3\u4f7f\u7528\u65f6\uff0c\u53ea\u6709\u63a5\u53e3\u4e2d\u5b9a\u4e49\u7684\u65b9\u6cd5\u548cObject\u7c7b\u7684\u65b9\u6cd5\uff0c\u65e0\u6cd5\u4f7f\u7528\u7c7b\u672c\u8eab\u7684\u65b9\u6cd5\u548c\u7236\u7c7b\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n
        \u63a5\u53e3\u540c\u6837\u652f\u6301\u5411\u4e0b\u8f6c\u578b\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) {
            Study study = new Teacher(\"\u5c0f\u738b\", 27, \"\u7537\");
            if(study instanceof Teacher) {   \/\/\u76f4\u63a5\u5224\u65ad\u5f15\u7528\u7684\u5bf9\u8c61\u662f\u4e0d\u662fTeacher\u7c7b\u578b
                Teacher teacher = (Teacher) study;   \/\/\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362
                teacher.study();
            }
        }<\/pre>\n\n\n\n
        \u8fd9\u91cc\u7684\u4f7f\u7528\u5176\u5b9e\u8ddf\u4e4b\u524d\u7684\u7236\u7c7b\u662f\u5dee\u4e0d\u591a\u7684\u3002<\/p>\n\n\n\n
        \u4eceJava8\u5f00\u59cb\uff0c\u63a5\u53e3\u4e2d\u53ef\u4ee5\u5b58\u5728\u65b9\u6cd5\u7684\u9ed8\u8ba4\u5b9e\u73b0\uff1a<\/p>\n\n\n\n
        public interface Study {
            void study();
        \u200b
            default void test() {   \/\/\u4f7f\u7528default\u5173\u952e\u5b57\u4e3a\u63a5\u53e3\u4e2d\u7684\u65b9\u6cd5\u6dfb\u52a0\u9ed8\u8ba4\u5b9e\u73b0
                System.out.println(\"\u6211\u662f\u9ed8\u8ba4\u5b9e\u73b0\");
            }
        }<\/pre>\n\n\n\n
        \u5982\u679c\u65b9\u6cd5\u5728\u63a5\u53e3\u4e2d\u5b58\u5728\u9ed8\u8ba4\u5b9e\u73b0\uff0c\u90a3\u4e48\u5b9e\u73b0\u7c7b\u4e2d\u4e0d\u5f3a\u5236\u8981\u6c42\u8fdb\u884c\u5b9e\u73b0\u3002<\/p>\n\n\n\n
        \u63a5\u53e3\u4e0d\u540c\u4e8e\u7c7b\uff0c\u63a5\u53e3\u4e2d\u4e0d\u5141\u8bb8\u5b58\u5728\u6210\u5458\u53d8\u91cf\u548c\u6210\u5458\u65b9\u6cd5\uff0c\u4f46\u662f\u53ef\u4ee5\u5b58\u5728\u9759\u6001\u53d8\u91cf\u548c\u9759\u6001\u65b9\u6cd5\uff0c\u5728\u63a5\u53e3\u4e2d\u5b9a\u4e49\u7684\u53d8\u91cf\u53ea\u80fd\u662f\uff1a<\/p>\n\n\n\n
        public interface Study {
            public static final int a = 10;   \/\/\u63a5\u53e3\u4e2d\u5b9a\u4e49\u7684\u9759\u6001\u53d8\u91cf\u53ea\u80fd\u662fpublic static final\u7684
          
            public static void test(){    \/\/\u63a5\u53e3\u4e2d\u5b9a\u4e49\u7684\u9759\u6001\u65b9\u6cd5\u4e5f\u53ea\u80fd\u662fpublic\u7684
                System.out.println(\"\u6211\u662f\u9759\u6001\u65b9\u6cd5\");
            }
            
            void study();
        }<\/pre>\n\n\n\n
        \u8ddf\u666e\u901a\u7684\u7c7b\u4e00\u6837\uff0c\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7\u63a5\u53e3\u540d.\u7684\u65b9\u5f0f\u4f7f\u7528\u9759\u6001\u5185\u5bb9\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) {
            System.out.println(Study.a);
            Study.test();
        }<\/pre>\n\n\n\n
        \u63a5\u53e3\u662f\u53ef\u4ee5\u7ee7\u627f\u81ea\u5176\u4ed6\u63a5\u53e3\u7684\uff1a<\/p>\n\n\n\n
        public interface A exetnds B {
          
        }<\/pre>\n\n\n\n
        \u5e76\u4e14\u63a5\u53e3\u6ca1\u6709\u7ee7\u627f\u6570\u91cf\u9650\u5236\uff0c\u63a5\u53e3\u652f\u6301\u591a\u7ee7\u627f\uff1a<\/p>\n\n\n\n
        public interface A exetnds B, C, D {
          
        }<\/pre>\n\n\n\n
        \u63a5\u53e3\u7684\u7ee7\u627f\u76f8\u5f53\u4e8e\u662f\u5bf9\u63a5\u53e3\u529f\u80fd\u7684\u878d\u5408\u7f62\u4e86\u3002<\/p>\n\n\n\n
        \u6700\u540e\u6211\u4eec\u6765\u4ecb\u7ecd\u4e00\u4e0bObject\u7c7b\u4e2d\u63d0\u4f9b\u7684\u514b\u9686\u65b9\u6cd5\uff0c\u4e3a\u5565\u8981\u7559\u5230\u8fd9\u91cc\u624d\u6765\u8bb2\u5462\uff1f\u56e0\u4e3a\u5b83\u9700\u8981\u5b9e\u73b0\u63a5\u53e3\u624d\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n\n\n\n
        package java.lang;
        \u200b
        public interface Cloneable {    \/\/\u8fd9\u4e2a\u63a5\u53e3\u4e2d\u4ec0\u4e48\u90fd\u6ca1\u5b9a\u4e49
        }<\/pre>\n\n\n\n
        \u5b9e\u73b0\u63a5\u53e3\u540e\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u5c06\u514b\u9686\u65b9\u6cd5\u7684\u53ef\u89c1\u6027\u63d0\u5347\u4e00\u4e0b\uff0c\u4e0d\u7136\u8fd8\u7528\u4e0d\u4e86\uff1a<\/p>\n\n\n\n
        public class Student extends Person implements Study, Cloneable {   \/\/\u9996\u5148\u5b9e\u73b0Cloneable\u63a5\u53e3\uff0c\u8868\u793a\u8fd9\u4e2a\u7c7b\u5177\u6709\u514b\u9686\u7684\u529f\u80fd
            public Student(String name, int age, String sex) {
                super(name, age, sex, \"\u5b66\u751f\");
            }
        \u200b
            @Override
            public Object clone() throws CloneNotSupportedException {   \/\/\u63d0\u5347clone\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650
                return super.clone();   \/\/\u56e0\u4e3a\u5e95\u5c42\u662fC++\u5b9e\u73b0\uff0c\u6211\u4eec\u76f4\u63a5\u8c03\u7528\u7236\u7c7b\u7684\u5b9e\u73b0\u5c31\u53ef\u4ee5\u4e86
            }
        \u200b
            @Override
            public void study() {
                System.out.println(\"\u6211\u4f1a\u5b66\u4e60\uff01\");
            }
        }<\/pre>\n\n\n\n
        \u63a5\u7740\u6211\u4eec\u6765\u5c1d\u8bd5\u4e00\u4e0b\uff0c\u770b\u770b\u662f\u4e0d\u662f\u4f1a\u5f97\u5230\u4e00\u4e2a\u4e00\u6a21\u4e00\u6837\u7684\u5bf9\u8c61\uff1a<\/p>\n\n\n\n
        public static void main(String[] args) throws CloneNotSupportedException {  \/\/\u8fd9\u91cc\u5411\u4e0a\u629b\u51fa\u4e00\u4e0b\u5f02\u5e38\uff0c\u8fd8\u6ca1\u5b66\u5f02\u5e38\uff0c\u6240\u4ee5\u8bf4\u7167\u7740\u5199\u5c31\u884c\u4e86
            Student student = new Student(\"\u5c0f\u660e\", 18, \"\u7537\");
            Student clone = (Student) student.clone();   \/\/\u8c03\u7528clone\u65b9\u6cd5\uff0c\u5f97\u5230\u4e00\u4e2a\u514b\u9686\u7684\u5bf9\u8c61
            System.out.println(student);
            System.out.println(clone);
            System.out.println(student == clone);
        }<\/pre>\n\n\n\n
        \u53ef\u4ee5\u53d1\u73b0\uff0c\u539f\u5bf9\u8c61\u548c\u514b\u9686\u5bf9\u8c61\uff0c\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u5bf9\u8c61\uff0c\u4f46\u662f\u4ed6\u4eec\u7684\u5404\u79cd\u5c5e\u6027\u90fd\u662f\u5b8c\u5168\u4e00\u6837\u7684\uff1a<\/p>\n\n\n\n
        \"image-20220922110044636\"\/<\/div><\/figure>\n\n\n\n
        \u901a\u8fc7\u5b9e\u73b0\u63a5\u53e3\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5f88\u8f7b\u677e\u5730\u5b8c\u6210\u5bf9\u8c61\u7684\u514b\u9686\u4e86\uff0c\u5728\u6211\u4eec\u4e4b\u540e\u7684\u5b66\u4e60\u4e2d\uff0c\u8fd8\u4f1a\u7ecf\u5e38\u9047\u5230\u63a5\u53e3\u7684\u4f7f\u7528\u3002<\/p>\n\n\n\n
        \u6ce8\u610f\uff1a<\/strong>\u4ee5\u4e0b\u5185\u5bb9\u4e3a\u9009\u5b66\u5185\u5bb9\uff0c\u5728\u8bbe\u8ba1\u6a21\u5f0f\u7bc7\u89c6\u9891\u6559\u7a0b\u4e2d\u6709\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n\n\n\n
        \n
        \u514b\u9686\u64cd\u4f5c\u53ef\u4ee5\u5b8c\u5168\u590d\u5236\u4e00\u4e2a\u5bf9\u8c61\u7684\u6240\u6709\u5c5e\u6027\uff0c\u4f46\u662f\u50cf\u8fd9\u6837\u7684\u62f7\u8d1d\u64cd\u4f5c\u5176\u5b9e\u4e5f\u5206\u4e3a\u6d45\u62f7\u8d1d\u548c\u6df1\u62f7\u8d1d\u3002<\/p>\n\n\n\n
          \n
        • \u6d45\u62f7\u8d1d\uff1a<\/strong>\u5bf9\u4e8e\u7c7b\u4e2d\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff0c\u4f1a\u76f4\u63a5\u590d\u5236\u503c\u7ed9\u62f7\u8d1d\u5bf9\u8c61\uff1b\u5bf9\u4e8e\u5f15\u7528\u7c7b\u578b\uff0c\u53ea\u4f1a\u590d\u5236\u5bf9\u8c61\u7684\u5730\u5740\uff0c\u800c\u5b9e\u9645\u4e0a\u6307\u5411\u7684\u8fd8\u662f\u539f\u6765\u7684\u90a3\u4e2a\u5bf9\u8c61\uff0c\u62f7\u8d1d\u4e2a\u57fa\u83ab\u3002<\/li>\n\n\n\n
        • \u6df1\u62f7\u8d1d\uff1a<\/strong>\u65e0\u8bba\u662f\u57fa\u672c\u7c7b\u578b\u8fd8\u662f\u5f15\u7528\u7c7b\u578b\uff0c\u6df1\u62f7\u8d1d\u4f1a\u5c06\u5f15\u7528\u7c7b\u578b\u7684\u6240\u6709\u5185\u5bb9\uff0c\u5168\u90e8\u62f7\u8d1d\u4e3a\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\uff0c\u5305\u62ec\u5bf9\u8c61\u5185\u90e8\u7684\u6240\u6709\u6210\u5458\u53d8\u91cf\uff0c\u4e5f\u4f1a\u8fdb\u884c\u62f7\u8d1d\u3002<\/li>\n<\/ul>\n\n\n\n
          \u90a3\u4e48clone\u65b9\u6cd5\u51fa\u6765\u7684\u514b\u9686\u5bf9\u8c61\uff0c\u662f\u6df1\u62f7\u8d1d\u7684\u7ed3\u679c\u8fd8\u662f\u6d45\u62f7\u8d1d\u7684\u7ed3\u679c\u5462\uff1f<\/p>\n\n\n\n
          public static void main(String[] args) throws CloneNotSupportedException {
              Student student = new Student(\"\u5c0f\u660e\", 18, \"\u7537\");
              Student clone = (Student) student.clone();
              System.out.println(student.name == clone.name);
          }<\/pre>\n\n\n\n
          \"image-20220922110750697\"\/<\/div><\/figure>\n\n\n\n
          \u53ef\u4ee5\u770b\u5230\uff0c\u867d\u7136Student\u5bf9\u8c61\u6210\u529f\u62f7\u8d1d\uff0c\u4f46\u662f\u5176\u5185\u5c42\u5bf9\u8c61\u5e76\u6ca1\u6709\u8fdb\u884c\u62f7\u8d1d\uff0c\u4f9d\u7136\u53ea\u662f\u5bf9\u8c61\u5f15\u7528\u7684\u590d\u5236\uff0c\u6240\u4ee5Java\u4e3a\u6211\u4eec\u63d0\u4f9b\u7684clone<\/code>\u65b9\u6cd5\u53ea\u4f1a\u8fdb\u884c\u6d45\u62f7\u8d1d\u3002<\/p>\n<\/blockquote>\n\n\n\n
          \n\n\n\n
          \u679a\u4e3e\u7c7b<\/h2>\n\n\n\n
          \u5047\u8bbe\u73b0\u5728\u6211\u4eec\u60f3\u7ed9\u5c0f\u660e\u6dfb\u52a0\u4e00\u4e2a\u72b6\u6001\uff08\u8dd1\u6b65\u3001\u5b66\u4e60\u3001\u7761\u89c9\uff09\uff0c\u5916\u90e8\u53ef\u4ee5\u5b9e\u65f6\u83b7\u53d6\u5c0f\u660e\u7684\u72b6\u6001\uff1a<\/p>\n\n\n\n
          public class Student extends Person implements Study {
          \u200b
              private String status;   \/\/\u72b6\u6001\uff0c\u53ef\u4ee5\u662f\u8dd1\u6b65\u3001\u5b66\u4e60\u3001\u7761\u89c9\u8fd9\u4e09\u4e2a\u4e4b\u4e2d\u7684\u5176\u4e2d\u4e00\u79cd
          \u200b
              public String getStatus() {
                  return status;
              }
          \u200b
              public void setStatus(String status) {
                  this.status = status;
              }
          }<\/pre>\n\n\n\n
          \u4f46\u662f\u8fd9\u6837\u4f1a\u51fa\u73b0\u4e00\u4e2a\u95ee\u9898\uff0c\u5982\u679c\u6211\u4eec\u4ec5\u4ec5\u662f\u5b58\u50a8\u5b57\u7b26\u4e32\uff0c\u4f3c\u4e4e\u5916\u90e8\u53ef\u4ee5\u4e0d\u6309\u7167\u6211\u4eec\u89c4\u5219\uff0c\u4f20\u5165\u4e00\u4e9b\u5176\u4ed6\u7684\u5b57\u7b26\u4e32\u3002\u8fd9\u663e\u7136\u662f\u4e0d\u591f\u4e25\u8c28\u7684\uff0c\u6709\u6ca1\u6709\u4e00\u79cd\u529e\u6cd5\uff0c\u80fd\u591f\u66f4\u597d\u5730\u53bb\u5b9e\u73b0\u8fd9\u6837\u7684\u72b6\u6001\u6807\u8bb0\u5462\uff1f\u6211\u4eec\u5e0c\u671b\u5f00\u53d1\u8005\u62ff\u5230\u4f7f\u7528\u7684\u5c31\u662f\u6211\u4eec\u9884\u5148\u5b9a\u4e49\u597d\u7684\u72b6\u6001\uff0c\u6240\u4ee5\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u679a\u4e3e\u7c7b\u6765\u5b8c\u6210\uff1a<\/p>\n\n\n\n
          public enum Status {   \/\/enum\u8868\u793a\u8fd9\u662f\u4e00\u4e2a\u679a\u4e3e\u7c7b\uff0c\u679a\u4e3e\u7c7b\u7684\u8bed\u6cd5\u7a0d\u5fae\u6709\u4e00\u4e9b\u4e0d\u4e00\u6837
              RUNNING, STUDY, SLEEP;    \/\/\u76f4\u63a5\u5199\u6bcf\u4e2a\u72b6\u6001\u7684\u540d\u5b57\u5373\u53ef\uff0c\u6700\u540e\u9762\u5206\u53f7\u53ef\u4ee5\u4e0d\u6253\uff0c\u4f46\u662f\u63a8\u8350\u6253\u4e0a
          }<\/pre>\n\n\n\n
          \u4f7f\u7528\u679a\u4e3e\u7c7b\u4e5f\u975e\u5e38\u65b9\u4fbf\uff0c\u5c31\u50cf\u4f7f\u7528\u666e\u901a\u7c7b\u578b\u90a3\u6837\uff1a<\/p>\n\n\n\n
          private Status status;   \/\/\u7c7b\u578b\u53d8\u6210\u521a\u521a\u5b9a\u4e49\u7684\u679a\u4e3e\u7c7b

          public Status getStatus() {
              return status;
          }

          public void setStatus(Status status) {
              this.status = status;
          }<\/pre>\n\n\n\n
          \u8fd9\u6837\uff0c\u522b\u4eba\u5728\u4f7f\u7528\u65f6\uff0c\u5c31\u80fd\u5f88\u6e05\u695a\u5730\u77e5\u9053\u6211\u4eec\u652f\u6301\u54ea\u4e9b\u4e86\uff1a<\/p>\n\n\n\n
          \"image-20220922111426974\"\/<\/div><\/figure>\n\n\n\n
          \u679a\u4e3e\u7c7b\u578b\u4f7f\u7528\u8d77\u6765\u5c31\u975e\u5e38\u65b9\u4fbf\u4e86\uff0c\u5176\u5b9e\u679a\u4e3e\u7c7b\u578b\u7684\u672c\u8d28\u5c31\u662f\u4e00\u4e2a\u666e\u901a\u7684\u7c7b\uff0c\u4f46\u662f\u5b83\u7ee7\u627f\u81eaEnum<\/code>\u7c7b\uff0c\u6211\u4eec\u5b9a\u4e49\u7684\u6bcf\u4e00\u4e2a\u72b6\u6001\u5176\u5b9e\u5c31\u662f\u4e00\u4e2apublic static final<\/code>\u7684Status\u7c7b\u578b\u6210\u5458\u53d8\u91cf\uff1a<\/p>\n\n\n\n
          \/\/\u8fd9\u91cc\u4f7f\u7528javap\u547d\u4ee4\u5bf9class\u6587\u4ef6\u8fdb\u884c\u53cd\u7f16\u8bd1\u5f97\u5230 Compiled from \"Status.java\"
          public final class com.test.Status extends java.lang.Enum<com.test.Status> {
            public static final com.test.Status RUNNING;
            public static final com.test.Status STUDY;
            public static final com.test.Status SLEEP;
            public static com.test.Status[] values();
            public static com.test.Status valueOf(java.lang.String);
            static {};
          }<\/pre>\n\n\n\n
          \u65e2\u7136\u679a\u4e3e\u7c7b\u578b\u662f\u666e\u901a\u7684\u7c7b\uff0c\u90a3\u4e48\u6211\u4eec\u4e5f\u53ef\u4ee5\u7ed9\u679a\u4e3e\u7c7b\u578b\u6dfb\u52a0\u72ec\u6709\u7684\u6210\u5458\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
          public enum Status {
              RUNNING(\"\u7761\u89c9\"), STUDY(\"\u5b66\u4e60\"), SLEEP(\"\u7761\u89c9\");   \/\/\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u88ab\u8986\u76d6\uff0c\u521b\u5efa\u679a\u4e3e\u9700\u8981\u6dfb\u52a0\u53c2\u6570\uff08\u672c\u8d28\u5c31\u662f\u8c03\u7528\u7684\u6784\u9020\u65b9\u6cd5\uff09

              private final String name;    \/\/\u679a\u4e3e\u7684\u6210\u5458\u53d8\u91cf
              Status(String name){    \/\/\u8986\u76d6\u539f\u6709\u6784\u9020\u65b9\u6cd5\uff08\u9ed8\u8ba4private\uff0c\u53ea\u80fd\u5185\u90e8\u4f7f\u7528\uff01\uff09
                  this.name = name;
              }

              public String getName() {   \/\/\u83b7\u53d6\u5c01\u88c5\u7684\u6210\u5458\u53d8\u91cf
                  return name;
              }
          }<\/pre>\n\n\n\n
          \u8fd9\u6837\uff0c\u679a\u4e3e\u5c31\u53ef\u4ee5\u6309\u7167\u6211\u4eec\u60f3\u8981\u7684\u4e2d\u6587\u540d\u79f0\u6253\u5370\u4e86\uff1a<\/p>\n\n\n\n
          public static void main(String[] args) {
              Student student = new Student(\"\u5c0f\u660e\", 18, \"\u7537\");
              student.setStatus(Status.RUNNING);
              System.out.println(student.getStatus().getName());
          }<\/pre>\n\n\n\n
          \u679a\u4e3e\u7c7b\u8fd8\u81ea\u5e26\u4e00\u4e9b\u7ee7\u627f\u4e0b\u6765\u7684\u5b9e\u7528\u65b9\u6cd5\uff0c\u6bd4\u5982\u83b7\u53d6\u679a\u4e3e\u7c7b\u4e2d\u7684\u6240\u6709\u679a\u4e3e\uff0c\u53ea\u4e0d\u8fc7\u8fd9\u91cc\u7528\u5230\u4e86\u6570\u7ec4\uff0c\u6211\u4eec\u4f1a\u5728\u4e0b\u4e00\u7ae0\u8fdb\u884c\u4ecb\u7ecd\u3002<\/p>\n\n\n\n
          \u81f3\u6b64\uff0c\u9762\u5411\u5bf9\u8c61\u57fa\u7840\u5185\u5bb9\u5c31\u5168\u90e8\u8bb2\u89e3\u5b8c\u6210\u4e86\uff0c\u4e0b\u4e00\u7ae0\u6211\u4eec\u8fd8\u5c06\u7ee7\u7eed\u8bb2\u89e3\u9762\u5411\u5bf9\u8c61\u7684\u5176\u4ed6\u5185\u5bb9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
          \u6211\u4eec\u5728\u524d\u9762\u5df2\u7ecf\u5b66\u4e60\u4e86\u9762\u5411\u8fc7\u7a0b\u7f16\u7a0b\uff0c\u4e5f\u53ef\u4ee5\u81ea\u884c\u7f16\u5199\u51fa\u7b80\u5355\u7684\u7a0b\u5e8f\u4e86\u3002\u6211\u4eec\u63a5\u7740\u5c31\u9700\u8981\u8ba4\u8bc6 \u9762\u5411\u5bf9\u8c61\u7a0b\u5e8f\u8bbe\u8ba1\uff08Obje […]<\/p>\n","protected":false},"author":1,"featured_media":9,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[14,20],"class_list":["post-159","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-java","tag-20"],"_links":{"self":[{"href":"https:\/\/www.zdpokemon.top\/index.php\/wp-json\/wp\/v2\/posts\/159","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zdpokemon.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zdpokemon.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zdpokemon.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zdpokemon.top\/index.php\/wp-json\/wp\/v2\/comments?post=159"}],"version-history":[{"count":1,"href":"https:\/\/www.zdpokemon.top\/index.php\/wp-json\/wp\/v2\/posts\/159\/revisions"}],"predecessor-version":[{"id":160,"href":"https:\/\/www.zdpokemon.top\/index.php\/wp-json\/wp\/v2\/posts\/159\/revisions\/160"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zdpokemon.top\/index.php\/wp-json\/wp\/v2\/media\/9"}],"wp:attachment":[{"href":"https:\/\/www.zdpokemon.top\/index.php\/wp-json\/wp\/v2\/media?parent=159"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zdpokemon.top\/index.php\/wp-json\/wp\/v2\/categories?post=159"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zdpokemon.top\/index.php\/wp-json\/wp\/v2\/tags?post=159"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}