{"id":102561,"date":"2026-09-09T07:33:06","date_gmt":"2026-09-08T23:33:06","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/102561.html"},"modified":"2026-09-09T07:33:06","modified_gmt":"2026-09-08T23:33:06","slug":"java-%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e6%a0%b8%e5%bf%83%e5%85%a5%e9%97%a8%ef%bc%88%e4%b9%9d%ef%bc%89%ef%bc%9a%e6%96%b9%e6%b3%95%e9%87%8d%e5%86%99-override%ef%bd%9c%e5%bd%bb%e5%ba%95%e5%88%86","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/102561.html","title":{"rendered":"Java \u9762\u5411\u5bf9\u8c61\u6838\u5fc3\u5165\u95e8\uff08\u4e5d\uff09\uff1a\u65b9\u6cd5\u91cd\u5199 Override\uff5c\u5f7b\u5e95\u5206\u6e05\u91cd\u8f7d\u4e0e\u91cd\u5199"},"content":{"rendered":"

\u300c Java \u9762\u5411\u5bf9\u8c61\u7cfb\u5217 09 \u300d<\/p>\n

📖 \u4e0a\u7bc7\u56de\u987e：Java \u9762\u5411\u5bf9\u8c61\u6838\u5fc3\u5165\u95e8（\u516b）：\u7ee7\u627f\u8be6\u89e3｜\u4ee3\u7801\u590d\u7528\u7684\u6838\u5fc3-CSDN\u535a\u5ba2<\/p>\n

\u4e0a\u4e00\u7bc7\u6211\u4eec\u5b66\u4f1a\u4e86 \u7ee7\u627f extends：\u5b50\u7c7b\u53ef\u4ee5\u62ff\u5230\u7236\u7c7b\u7684\u6240\u6709\u516c\u5171\u65b9\u6cd5\u3002<\/p>\n

\u4f46\u65b0\u95ee\u9898\u6765\u4e86：<\/p>\n

\u5982\u679c\u7236\u7c7b\u7684\u65b9\u6cd5\u903b\u8f91\u4e0d\u9002\u5408\u5b50\u7c7b，\u5b50\u7c7b\u4e0d\u60f3\u7528\u7236\u7c7b\u65e7\u903b\u8f91，\u60f3 \u81ea\u5df1\u91cd\u65b0\u6539\u5199 \u600e\u4e48\u529e？<\/p>\n

\u7b54\u6848\u5c31\u662f：\u65b9\u6cd5\u91cd\u5199（Override）<\/p>\n

\u91cd\u5199\u662f\u7ee7\u627f\u540e\u6700\u91cd\u8981\u7684\u64cd\u4f5c，\u4e5f\u662f\u9762\u8bd5\u5fc5\u8003\u3001\u548c\u91cd\u8f7d\u6700\u5bb9\u6613\u6df7\u6dc6\u7684\u77e5\u8bc6\u70b9\u3002<\/p>\n

\u4e00\u3001\u4ec0\u4e48\u662f\u65b9\u6cd5\u91cd\u5199？<\/h3>\n

\u91cd\u5199：\u5b50\u7c7b\u5bf9\u7236\u7c7b\u5df2\u7ecf\u5b58\u5728\u7684\u65b9\u6cd5，\u8fdb\u884c\u91cd\u65b0\u5b9e\u73b0\u3001\u8986\u76d6\u539f\u6709\u903b\u8f91\u3002<\/p>\n

\u901a\u4fd7\u7406\u89e3：<\/p>\n

\u7236\u7c7b\u6709\u4e00\u4e2a\u529f\u80fd，\u5b50\u7c7b\u4e0d\u6ee1\u610f，\u4e0d\u6539\u7236\u7c7b\u4ee3\u7801，\u5728\u5b50\u7c7b\u81ea\u5df1\u91cd\u65b0\u5199\u4e00\u904d，\u4f18\u5148\u7528\u5b50\u7c7b\u81ea\u5df1\u7684\u903b\u8f91\u3002<\/p>\n

\u4e8c\u3001\u4e3a\u4ec0\u4e48\u9700\u8981\u91cd\u5199？<\/h3>\n

\u4e3e\u4e2a\u573a\u666f：<\/p>\n

\u7236\u7c7b Person \u6709\u65b9\u6cd5 say()：\u666e\u901a\u4eba\u8bf4\u8bdd<\/p>\n

\u5b50\u7c7b Teacher \u7ee7\u627f\u540e，\u60f3\u8981 \u8001\u5e08\u4e13\u5c5e\u8bf4\u8bdd\u903b\u8f91<\/p>\n

\u8fd9\u65f6\u5c31\u9700\u8981\u91cd\u5199，\u8986\u76d6\u7236\u7c7b\u65b9\u6cd5\u3002<\/p>\n

\u4e09\u3001\u91cd\u5199\u5b8c\u6574\u5b9e\u6218\u6848\u4f8b<\/h3>\n

1. \u5b9a\u4e49\u7236\u7c7b<\/h4>\n

class<\/span> Person<\/span>{<\/span>
\n public<\/span> void<\/span> say<\/span>(<\/span>)<\/span>{<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u666e\u901a\u4eba\u6b63\u5e38\u8bf4\u8bdd"<\/span>)<\/span>;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

2. \u5b50\u7c7b\u91cd\u5199\u7236\u7c7b\u65b9\u6cd5<\/h4>\n

class<\/span> Teacher<\/span> extends<\/span> Person<\/span>{<\/span>
\n \/\/ \u91cd\u5199\u7236\u7c7bsay\u65b9\u6cd5<\/span>
\n @Override<\/span>
\n public<\/span> void<\/span> say<\/span>(<\/span>)<\/span> {<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u8001\u5e08\u8bb2\u8bfe，\u6e29\u67d4\u53d1\u8a00"<\/span>)<\/span>;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

3. \u6d4b\u8bd5\u8fd0\u884c<\/h4>\n

public<\/span> class<\/span> TestOverride<\/span> {<\/span>
\n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
\n Teacher<\/span> t =<\/span> new<\/span> Teacher<\/span>(<\/span>)<\/span>;<\/span>
\n t.<\/span>say<\/span>(<\/span>)<\/span>;<\/span> \/\/ \u6267\u884c\u7684\u662f\u5b50\u7c7b\u91cd\u5199\u540e\u7684\u65b9\u6cd5<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\u8fd0\u884c\u7ed3\u679c<\/h4>\n

\u8001\u5e08\u8bb2\u8bfe，\u6e29\u67d4\u53d1\u8a00<\/p>\n

\u2705 \u53ef\u4ee5\u770b\u5230：\u5b50\u7c7b\u91cd\u5199\u540e，\u4f18\u5148\u6267\u884c\u5b50\u7c7b\u903b\u8f91，\u7236\u7c7b\u65b9\u6cd5\u88ab\u8986\u76d6<\/p>\n

\u56db\u3001\u91cd\u5199\u7684\u4e25\u683c\u8bed\u6cd5\u89c4\u5219（\u5fc5\u80cc）<\/h3>\n

\u60f3\u8981\u6784\u6210\u5408\u6cd5\u91cd\u5199，\u5fc5\u987b\u6ee1\u8db3：<\/p>\n

  • \n

    \u53d1\u751f\u5728\u7236\u5b50\u7c7b\u4e4b\u95f4（\u5fc5\u987b\u6709\u7ee7\u627f）<\/p>\n<\/li>\n

  • \n

    \u65b9\u6cd5\u540d\u3001\u53c2\u6570\u5217\u8868\u5fc5\u987b\u548c\u7236\u7c7b\u5b8c\u5168\u4e00\u81f4<\/p>\n<\/li>\n

  • \n

    \u8bbf\u95ee\u6743\u9650\u4e0d\u80fd\u6bd4\u7236\u7c7b\u66f4\u5c0f<\/p>\n<\/li>\n

  • \n

    \u8fd4\u56de\u503c\u3001\u5f02\u5e38\u9700\u8981\u517c\u5bb9<\/p>\n<\/li>\n

  • \n

    \u5efa\u8bae\u52a0\u4e0a\u6ce8\u89e3：@Override（\u6821\u9a8c\u662f\u5426\u662f\u5408\u6cd5\u91cd\u5199）<\/p>\n<\/li>\n

    \u4e94\u3001@Override \u6ce8\u89e3\u7684\u4f5c\u7528<\/h3>\n

    \u5f88\u591a\u65b0\u624b\u4e0d\u77e5\u9053\u8fd9\u4e2a\u6ce8\u89e3\u5e72\u561b\u7684，\u5176\u5b9e\u975e\u5e38\u91cd\u8981：<\/p>\n

    \u2705 \u81ea\u52a8\u6821\u9a8c\u5f53\u524d\u65b9\u6cd5 \u662f\u5426\u662f\u5408\u6cd5\u91cd\u5199<\/p>\n

    \u2705 \u5199\u9519\u65b9\u6cd5\u540d\u3001\u53c2\u6570\u4e0d\u5bf9\u3001\u6743\u9650\u4e0d\u5bf9，\u76f4\u63a5\u7206\u7ea2\u62a5\u9519<\/p>\n

    \u2705 \u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027，\u4e00\u773c\u770b\u51fa\u8fd9\u662f\u91cd\u5199\u65b9\u6cd5<\/p>\n

    \u4e3e\u4e2a\u4f8b\u5b50：\u6ce8\u89e3\u5e2e\u4f60\u81ea\u52a8\u7ea0\u9519<\/h4>\n

    class<\/span> Person<\/span> {<\/span>
    \n public<\/span> void<\/span> say<\/span>(<\/span>)<\/span> {<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u666e\u901a\u4eba\u6b63\u5e38\u8bf4\u8bdd"<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    class<\/span> Teacher<\/span> extends<\/span> Person<\/span> {<\/span>
    \n \/\/ \u2705 \u6b63\u786e\u91cd\u5199<\/span>
    \n @Override<\/span>
    \n public<\/span> void<\/span> say<\/span>(<\/span>)<\/span> {<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u8001\u5e08\u8bb2\u8bfe，\u6e29\u67d4\u53d1\u8a00"<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u274c \u5199\u9519\u65b9\u6cd5\u540d，\u7f16\u8bd1\u62a5\u9519！<\/span>
    \n @Override<\/span>
    \n public<\/span> void<\/span> sayy<\/span>(<\/span>)<\/span> {<\/span> \/\/ \u7236\u7c7b\u6ca1\u6709 sayy() \u65b9\u6cd5<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u8001\u5e08\u8bb2\u8bfe"<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u274c \u53c2\u6570\u5217\u8868\u4e0d\u4e00\u81f4，\u7f16\u8bd1\u62a5\u9519！<\/span>
    \n @Override<\/span>
    \n public<\/span> void<\/span> say<\/span>(<\/span>String<\/span> word)<\/span> {<\/span> \/\/ \u7236\u7c7b\u662f say()，\u53c2\u6570\u4e0d\u540c<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u8001\u5e08\u8bf4："<\/span> +<\/span> word)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u52a0\u4e0a @Override \u540e，\u4e00\u65e6\u5199\u9519（\u65b9\u6cd5\u540d\u5199\u9519\u3001\u53c2\u6570\u4e0d\u5bf9），\u7f16\u8bd1\u5668\u4f1a\u76f4\u63a5\u62a5\u9519\u63d0\u793a，\u4e0d\u7528\u7b49\u5230\u8fd0\u884c\u65f6\u624d\u53d1\u73b0\u95ee\u9898\u3002<\/p>\n

    \u5f00\u53d1\u4e2d \u5f3a\u70c8\u5efa\u8bae\u6bcf\u6b21\u91cd\u5199\u90fd\u52a0\u4e0a @Override，\u8ba9\u7f16\u8bd1\u5668\u5e2e\u4f60\u628a\u5173\u3002<\/p>\n

    \u516d\u3001\u54ea\u4e9b\u65b9\u6cd5\u4e0d\u80fd\u88ab\u91cd\u5199？<\/h3>\n
  • \n

    private \u79c1\u6709\u65b9\u6cd5（\u5b50\u7c7b\u6839\u672c\u770b\u4e0d\u5230）<\/p>\n<\/li>\n

  • \n

    static \u9759\u6001\u65b9\u6cd5（\u5c5e\u4e8e\u7c7b，\u4e0d\u5c5e\u4e8e\u5bf9\u8c61）<\/p>\n<\/li>\n

  • \n

    final \u6700\u7ec8\u65b9\u6cd5（\u7981\u6b62\u91cd\u5199）<\/p>\n<\/li>\n

  • \n

    \u6784\u9020\u65b9\u6cd5（\u4e0d\u80fd\u7ee7\u627f\u81ea\u7136\u4e0d\u80fd\u91cd\u5199）<\/p>\n<\/li>\n

    \u4e03\u3001\u91cd\u8f7d VS \u91cd\u5199 \u7ec8\u6781\u5bf9\u6bd4（\u65b0\u624b\u5fc5\u770b）<\/h3>\n

    \u8fd9\u662f Java \u9762\u8bd5\u6700\u5bb9\u6613\u6df7\u6dc6\u7684\u4e24\u5927\u6982\u5ff5！<\/p>\n\n\u5bf9\u6bd4\u9879\u91cd\u8f7d Overload\u91cd\u5199 Override<\/tr>\n\n\n\n\n\n\n\n\n
    \u53d1\u751f\u8303\u56f4<\/td>\n\u672c\u7c7b\u5185\u90e8<\/td>\n\u7236\u5b50\u7c7b\u4e4b\u95f4（\u9700\u8981\u7ee7\u627f）<\/td>\n<\/tr>\n
    \u65b9\u6cd5\u540d<\/td>\n\u76f8\u540c<\/td>\n\u76f8\u540c<\/td>\n<\/tr>\n
    \u53c2\u6570\u5217\u8868<\/td>\n\u5fc5\u987b\u4e0d\u540c<\/td>\n\u5fc5\u987b\u5b8c\u5168\u76f8\u540c<\/td>\n<\/tr>\n
    \u8fd4\u56de\u503c<\/td>\n\u65e0\u5173<\/td>\n\u5fc5\u987b\u517c\u5bb9<\/td>\n<\/tr>\n
    \u6743\u9650<\/td>\n\u65e0\u5173<\/td>\n\u4e0d\u80fd\u7f29\u5c0f\u6743\u9650<\/td>\n<\/tr>\n
    \u6ce8\u89e3<\/td>\n\u4e0d\u9700\u8981<\/td>\n\u63a8\u8350 @Override<\/td>\n<\/tr>\n
    \u4f5c\u7528<\/td>\n\u65b9\u6cd5\u591a\u6837\u5316\u8c03\u7528<\/td>\n\u5b50\u7c7b\u8986\u76d6\u7236\u7c7b\u903b\u8f91<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u516b\u3001\u5f00\u53d1\u4e2d\u91cd\u5199\u6700\u5e38\u7528\u573a\u666f<\/h3>\n
  • \n

    \u7236\u7c7b\u901a\u7528\u903b\u8f91\u4e0d\u6ee1\u8db3\u5b50\u7c7b\u9700\u6c42，\u9700\u8981\u81ea\u5b9a\u4e49\u884c\u4e3a<\/p>\n<\/li>\n

  • \n

    \u9879\u76ee\u4e2d\u51e0\u4e4e\u6240\u6709\u5b9e\u4f53\u7c7b\u90fd\u4f1a \u91cd\u5199 toString()<\/p>\n<\/li>\n

  • \n

    \u6846\u67b6\u5f00\u53d1\u5927\u91cf\u4f9d\u8d56\u91cd\u5199\u505a\u529f\u80fd\u6269\u5c55<\/p>\n<\/li>\n

    \u4e5d\u3001\u65b0\u624b\u9ad8\u9891\u8e29\u5751<\/h3>\n

    \u57511：\u91cd\u5199\u65f6\u53c2\u6570\u5217\u8868\u5199\u9519<\/h4>\n

    \u53c2\u6570\u7c7b\u578b\/\u4e2a\u6570\u4e0d\u4e00\u81f4，\u4e0d\u662f\u91cd\u5199，\u662f\u65b0\u65b9\u6cd5！<\/p>\n

    \u57512：\u91cd\u5199\u6743\u9650\u6bd4\u7236\u7c7b\u66f4\u5c0f<\/h4>\n

    \u7236\u7c7b public，\u5b50\u7c7b\u4e0d\u80fd\u5199 default \/ private，\u7f16\u8bd1\u62a5\u9519<\/p>\n

    \u57513：\u9759\u6001\u65b9\u6cd5\u5f53\u6210\u91cd\u5199<\/h4>\n

    static \u65b9\u6cd5\u4e0d\u53eb\u91cd\u5199，\u53eb\u9690\u85cf，\u5b8c\u5168\u4e24\u56de\u4e8b<\/p>\n

    \u57514：\u5206\u4e0d\u6e05\u91cd\u8f7d\u548c\u91cd\u5199<\/h4>\n

    \u8bb0\u4f4f\u4e00\u53e5\u8bdd：\u672c\u7c7b\u540c\u540d\u4e0d\u540c\u53c2\u662f\u91cd\u8f7d，\u7236\u5b50\u540c\u540d\u540c\u53c2\u662f\u91cd\u5199<\/p>\n

    \u5341\u3001\u5168\u6587\u6838\u5fc3\u5c0f\u7ed3<\/h3>\n
  • \n

    \u91cd\u5199\u57fa\u4e8e\u7ee7\u627f，\u5b50\u7c7b\u8986\u76d6\u7236\u7c7b\u539f\u6709\u65b9\u6cd5\u903b\u8f91<\/p>\n<\/li>\n

  • \n

    \u91cd\u5199\u8981\u6c42：\u65b9\u6cd5\u540d\u3001\u53c2\u6570\u5217\u8868\u5b8c\u5168\u4e00\u81f4，\u6743\u9650\u4e0d\u7f29\u5c0f<\/p>\n<\/li>\n

  • \n

    \u4f7f\u7528 @Override \u6ce8\u89e3\u6821\u9a8c，\u675c\u7edd\u5199\u9519<\/p>\n<\/li>\n

  • \n

    private\u3001static\u3001final\u3001\u6784\u9020\u65b9\u6cd5\u4e0d\u80fd\u91cd\u5199<\/p>\n<\/li>\n

  • \n

    \u91cd\u8f7d\u770b\u53c2\u6570\u4e0d\u540c，\u91cd\u5199\u770b\u7236\u5b50\u8986\u76d6<\/p>\n<\/li>\n

    🚀 \u4e0b\u7bc7\u9884\u544a：\u91cd\u5199\u4e4b\u540e，\u6211\u4eec\u60f3\u5728\u5b50\u7c7b\u4e2d \u8c03\u7528\u7236\u7c7b\u539f\u672c\u7684\u65b9\u6cd5 \u600e\u4e48\u529e？\u4e0b\u4e00\u7bc7\u8be6\u89e3 super \u5173\u952e\u5b57，\u5b8c\u7f8e\u642d\u914d this\u3001\u7ee7\u627f\u3001\u91cd\u5199！<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u300c Java \u9762\u5411\u5bf9\u8c61\u7cfb\u5217 09 \u300d 📖 \u4e0a\u7bc7\u56de\u987e：Java \u9762\u5411\u5bf9\u8c61\u6838\u5fc3\u5165\u95e8（\u516b）：\u7ee7\u627f\u8be6\u89e3｜\u4ee3\u7801\u590d\u7528\u7684\u6838\u5fc3-CSDN\u535a\u5ba2 \u4e0a\u4e00\u7bc7\u6211\u4eec\u5b66\u4f1a\u4e86 \u7ee7\u627f extends：\u5b50\u7c7b\u53ef\u4ee5\u62ff\u5230\u7236\u7c7b\u7684\u6240\u6709\u516c\u5171\u65b9\u6cd5\u3002
    \n\u4f46\u65b0\u95ee\u9898\u6765\u4e86：
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    \n\u7b54\u6848\u5c31\u662f&#xff1a<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[11711,11710,11712,99,5366],"topic":[],"class_list":["post-102561","post","type-post","status-publish","format-standard","hentry","category-server","tag-override","tag-11710","tag-11712","tag-java","tag-5366"],"yoast_head":"\nJava \u9762\u5411\u5bf9\u8c61\u6838\u5fc3\u5165\u95e8\uff08\u4e5d\uff09\uff1a\u65b9\u6cd5\u91cd\u5199 Override\uff5c\u5f7b\u5e95\u5206\u6e05\u91cd\u8f7d\u4e0e\u91cd\u5199 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/102561.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java \u9762\u5411\u5bf9\u8c61\u6838\u5fc3\u5165\u95e8\uff08\u4e5d\uff09\uff1a\u65b9\u6cd5\u91cd\u5199 Override\uff5c\u5f7b\u5e95\u5206\u6e05\u91cd\u8f7d\u4e0e\u91cd\u5199 - 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