{"id":93598,"date":"2026-08-12T21:01:13","date_gmt":"2026-08-12T13:01:13","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/93598.html"},"modified":"2026-08-12T21:01:13","modified_gmt":"2026-08-12T13:01:13","slug":"java%e5%a4%9a%e6%80%81%e5%9f%ba%e7%a1%80%e5%85%a8%e9%9d%a2%e8%a7%a3%e6%9e%90%ef%bc%8c%e5%8a%a8%e6%80%81%e7%bb%91%e5%ae%9a%ef%bc%8c%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9%ef%bc%8c%e5%90%91%e4%b8%8a","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/93598.html","title":{"rendered":"Java\u591a\u6001\u57fa\u7840\u5168\u9762\u89e3\u6790\uff0c\u52a8\u6001\u7ed1\u5b9a\uff0c\u6ce8\u610f\u4e8b\u9879\uff0c\u5411\u4e0a\u548c\u5411\u4e0b\u8f6c\u578b\uff0c\u770b\u5b8c\u5305\u61c2\uff01"},"content":{"rendered":"

\u524d\u8a00\u2764\ufe0f\u2764\ufe0f<\/h2>\n

hello hello💕，\u8fd9\u91cc\u662f\u6d0b\u4e0d\u5199bug~😄，\u6b22\u8fce\u5927\u5bb6\u70b9\u8d5e👍👍，\u5173\u6ce8😍😍，\u6536\u85cf🌹🌹 \u591a\u6001\u662fJava\u5165\u95e8\u7684\u4e00\u4e2a\u91cd\u70b9，\u591a\u6001\u662f Java \u505a\u9879\u76ee\u6700\u6838\u5fc3\u3001\u6700\u9ad8\u9891\u3001\u5fc5\u7528\u7684\u7279\u6027\u4e4b\u4e00，\u9879\u76ee\u4e2d\u57fa\u672c\u4e0a\u5230\u5904\u90fd\u662f\u591a\u6001，\u8fd9\u7bc7\u535a\u5ba2\u5c31\u4f1a\u8be6\u7ec6\u7684\u89e3\u6790\u591a\u6001\u7684\u7528\u6cd5\u548c\u6ce8\u610f\u4e8b\u9879 \"\u8bf7\u6dfb\u52a0\u56fe\u7247\u63cf\u8ff0\" 🎇\u4e2a\u4eba\u4e3b\u9875：\u6d0b\u4e0d\u5199bug\u7684\u535a\u5ba2 🎇\u6240\u5c5e\u4e13\u680f：Java\u5b66\u4e60\u4e4b\u65c5，\u4ece\u5165\u95e8\u5230\u8fdb\u9636 🎇\u94c1\u6c41\u4eec\u5bf9\u4e8eJava\u7684\u5404\u79cd\u5e38\u7528\u6838\u5fc3\u8bed\u6cd5（\u4e0d\u592a\u5e38\u7528\u7684\u4e5f\u6709😆），\u90fd\u53ef\u4ee5\u5728\u4e0a\u9762\u7684Java\u4e13\u680f\u5b66\u4e60，\u4e13\u680f\u6b63\u5728\u6301\u7eed\u66f4\u65b0\u4e2d🐵🐵，\u6709\u95ee\u9898\u53ef\u4ee5\u5199\u5728\u8bc4\u8bba\u533a\u6216\u8005\u79c1\u4fe1\u6211\u54e6~<\/p>\n

1，\u591a\u6001\u7684\u7b80\u4ecb<\/h2>\n

\u591a\u6001\u5c5e\u4e8e\u662fJavaSE\u4e2d\u6700\u96be\u7684\u8bed\u6cd5 \u591a\u6001\u3001\u7ee7\u627f\u3001\u5c01\u88c5，\u5c5e\u4e8e\u662fJava\u7684\u4e09\u5927\u7279\u5f81<\/p>\n

\u591a\u6001\u7b80\u5355\u6765\u8bf4，\u5c31\u662f\u4e00\u4e2a\u5bf9\u8c61\u7684\u5f15\u7528，\u5177\u5907\u591a\u79cd\u5f62\u6001 \u5c31\u6bd4\u5982\u8bf4\u5927\u660e\u5bb6\u91cc\u517b\u4e86\u4e00\u53ea\u72d7\u53eb\u5927\u9ec4，\u5927\u660e\u53eb\u4ed6\u513f\u5b50 \u5927\u660e\u8fd8\u6709\u4e2a\u771f\u6b63\u7684\u513f\u5b50，\u5c0f\u660e \u6709\u4e00\u6b21，\u5927\u660e\u7684\u8001\u5a46\u7ed9\u5927\u660e\u8bf4，\u7ed9\u4f60\u513f\u5b50\u6574\u70b9\u5403\u7684，\u90a3\u8fd9\u65f6\u5019\u7a76\u7adf\u8c01\u7ed9\u72d7\u6574\u5403\u7684，\u8fd8\u662f\u7ed9\u5c0f\u660e\u6574\u5403\u7684，\u5c31\u8981\u7ed3\u5408\u4e0a\u4e0b\u6587\u7684\u8bed\u5883\u6765\u8fdb\u884c\u786e\u5b9a\u4e86<\/p>\n

\u4ee3\u7801\u5982\u4e0b\u6240\u793a：<\/p>\n

package<\/span> package1<\/span>;<\/span><\/p>\n

public<\/span> class<\/span> Son<\/span> {<\/span>
\n public<\/span> void<\/span> eat<\/span>(<\/span>)<\/span>{<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"Son\u5403\u4e1c\u897f"<\/span>)<\/span>;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

package<\/span> package1<\/span>;<\/span><\/p>\n

public<\/span> class<\/span> XiaoMing<\/span> extends<\/span> Son<\/span>{<\/span>
\n public<\/span> void<\/span> eat<\/span>(<\/span>)<\/span>{<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u5c0f\u660e\u5403\u7092\u7c73\u996d"<\/span>)<\/span>;<\/span>
\n }<\/span><\/p>\n

}<\/span><\/p>\n

package<\/span> package1<\/span>;<\/span><\/p>\n

public<\/span> class<\/span> Dog<\/span> extends<\/span> Son<\/span>{<\/span>
\n public<\/span> void<\/span> eat<\/span>(<\/span>)<\/span>{<\/span>
\n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u5927\u9ec4\u5403\u72d7\u7cae"<\/span>)<\/span>;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

package<\/span> package1<\/span>;<\/span><\/p>\n

public<\/span> class<\/span> Test<\/span> {<\/span>
\n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
\n Son<\/span> son =<\/span> new<\/span> Son<\/span>(<\/span>)<\/span>;<\/span>
\n son.<\/span>eat<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

son =<\/span> new<\/span> XiaoMing<\/span>(<\/span>)<\/span>;<\/span>
\n son.<\/span>eat<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

son =<\/span> new<\/span> Dog<\/span>(<\/span>)<\/span>;<\/span>
\n son.<\/span>eat<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

}<\/span>
\n}<\/span><\/p>\n

\u5728Test\u7c7b\u4e2d，\u4f7f\u7528\u7236\u7c7b\u7684\u5f15\u7528\u6307\u5411\u5b50\u7c7b\u5b9e\u4f8b，\u6267\u884c\u7ed3\u679c\u5982\u4e0b\u6240\u793a： \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

son\u8fd9\u4e2a\u5f15\u7528，\u53ef\u80fd\u6709\u591a\u79cd\u5f62\u6001，\u5177\u4f53\u662f\u54ea\u79cd\u5f62\u6001，\u5c31\u9700\u8981\u7ed3\u5408\u4e0a\u4e0b\u6587\u6765\u770b\u4e86，\u4e0d\u540c\u5f62\u6001\u6267\u884cson.eat()，\u6267\u884c\u7684\u662f\u4e0d\u540c\u7684\u903b\u8f91<\/p>\n<\/p>\n

\u591a\u6001\u4e5f\u6709\u5176\u4ed6\u7684\u4f8b\u5b50，\u5982\u4e0b\u6240\u793a：<\/p>\n

package<\/span> package1<\/span>;<\/span><\/p>\n

public<\/span> class<\/span> Test<\/span> {<\/span>
\n public<\/span> static<\/span> void<\/span> run<\/span>(<\/span>Son<\/span> son)<\/span>{<\/span>
\n son.<\/span>eat<\/span>(<\/span>)<\/span>;<\/span>
\n }<\/span><\/p>\n

public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
\n run<\/span>(<\/span>new<\/span> Son<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
\n run<\/span>(<\/span>new<\/span> XiaoMing<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
\n run<\/span>(<\/span>new<\/span> Dog<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u8fd9\u6837\u770b\u8d77\u6765\u662f\u5728\u8c03\u7528\u7236\u7c7bSon\u7684eat\u65b9\u6cd5，\u4f46\u662f\u5b9e\u9645\u4e0a\u6267\u884c\u7684\u903b\u8f91\u8fd8\u662f\u53d6\u51b3\u4e8eanimal\u5b9e\u9645\u6307\u5411\u7684\u5bf9\u8c61\u662f\u54ea\u4e2a\u7c7b\u578b\u7684<\/p>\n

2，\u52a8\u6001\u7ed1\u5b9a<\/h2>\n

\u5f53\u4ee3\u7801\u8fd0\u884c\u5230son.eat()\u7684\u65f6\u5019，JVM\u5c31\u4f1a\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d，\u5206\u6790son\u771f\u5b9e\u6307\u5411\u7684\u5bf9\u8c61\u662f\u5565\u7c7b\u578b\u7684，\u8fdb\u4e00\u6b65\u8c03\u7528\u5339\u914d\u7c7b\u578b\u7684\u65b9\u6cd5<\/p>\n

\u8fd9\u6837\u7684\u4e00\u4e2a\u8fc7\u7a0b\u5c31\u53ef\u4ee5\u79f0\u4e3a\u52a8\u6001\u7ed1\u5b9a，\u4e5f\u5c31\u662feat\u65b9\u6cd5\u6267\u884c\u54ea\u4e2a\u7248\u672c，\u4e0d\u662f\u5728\u7a0b\u5e8f\u7f16\u8bd1\u65f6（Java\u7a0b\u5e8f\u5728\u8fd0\u884c\u524d\u5148\u7f16\u8bd1\u6210\u5b57\u8282\u7801，\u7f16\u8bd1\u5b8c\u6210\u7684\u5b57\u8282\u7801\u53ef\u4ee5\u53cd\u590d\u6267\u884c\u591a\u6b21，\u4e5f\u53ef\u4ee5\u62f7\u8d1d\u5927\u5176\u4ed6\u673a\u5668\u4e0a\u6267\u884c）\u5c31\u786e\u5b9a\u7684，\u800c\u662f\u5728\u8fd0\u884c\u65f6\u786e\u5b9a\u7684<\/p>\n

\u548c\u7f16\u8bd1\u64cd\u4f5c\u76f8\u5173\u7684\u52a8\u4f5c\/\u8fc7\u7a0b，\u4e00\u822c\u79f0\u4e3a\u662f\u9759\u6001\u7684 \u548c\u8fd0\u884c\u76f8\u5173\u7684\u52a8\u4f5c\/\u8fc7\u7a0b，\u4e00\u822c\u79f0\u4e3a\u662f\u52a8\u6001\u7684 Java\u7684\u591a\u6001，\u5c31\u662f\u57fa\u4e8e\u52a8\u6001\u7ed1\u5b9a\u673a\u5236\u6765\u5b9e\u73b0\u7684<\/p>\n

3，\u591a\u6001\u4f7f\u7528\u7684\u6ce8\u610f\u4e8b\u9879<\/h2>\n

\u5728Java\u4e2d，\u8981\u5b9e\u73b0\u591a\u6001，\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9：<\/p>\n

  • \u5fc5\u987b\u5728\u7ee7\u627f\u6761\u4ef6\u4e0b <\/li>\n
  • \u5b50\u7c7b\u5fc5\u987b\u5bf9\u7236\u7c7b\u7684\u65b9\u6cd5\u8fdb\u884c\u91cd\u5199，\u5b50\u7c7b\u91cd\u5199\u7684\u65b9\u6cd5\u8981\u4e0e\u7236\u7c7b\u65b9\u6cd5\u7684\u65b9\u6cd5\u540d\u5b57\u3001\u53c2\u6570\u5217\u8868\u3001\u8fd4\u56de\u503c\u7c7b\u578b\u76f8\u5bb9（\u8fd4\u56de\u503c\u7c7b\u578b\u5b8c\u5168\u76f8\u540c\u6216\u8005\u5b50\u7c7b\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u662f\u7236\u7c7b\u5bf9\u5e94\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u7684\u5b50\u7c7b） <\/li>\n
  • \u901a\u8fc7\u7236\u7c7b\u7684\u5f15\u7528\u8c03\u7528\u91cd\u5199\u7684\u65b9\u6cd5 <\/li>\n
  • \u8bbf\u95ee\u6743\u9650\u4e0d\u80fd\u6bd4\u7236\u7c7b\u4e2d\u88ab\u91cd\u5199\u7684\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\u66f4\u4f4e，\u5982\u679c\u7236\u7c7b\u65b9\u6cd5\u88abpublic\u4fee\u9970，\u5219\u5b50\u7c7b\u4e2d\u91cd\u5199\u8be5\u65b9\u6cd5\u5c31\u4e0d\u80fd\u88ab\u58f0\u660e\u4e3aprotected <\/li>\n
  • \u7236\u7c7b\u88abstatic\u3001private\u4fee\u9970\u7684\u65b9\u6cd5，\u6784\u9020\u65b9\u6cd5\u90fd\u4e0d\u80fd\u88ab\u91cd\u5199 <\/li>\n
  • \u91cd\u5199\u7684\u65b9\u6cd5，\u63a8\u8350\u4f7f\u7528@Override\u6ce8\u89e3\u6765\u663e\u793a\u6307\u5b9a，\u8fd9\u4e2a\u6ce8\u89e3\u80fd\u5e2e\u6211\u4eec\u8fdb\u884c\u4e00\u4e9b\u5408\u6cd5\u6027\u7684\u6821\u9a8c，\u4f8b\u5982\u4e0d\u5c0f\u5fc3\u5c06\u65b9\u6cd5\u7684\u540d\u5b57\u62fc\u5199\u9519\u4e86，\u52a0\u4e86\u8fd9\u4e2a\u6ce8\u89e3\u540e\u5c31\u80fd\u68c0\u9a8c\u51fa\u6765 <\/li>\n

    \u8fd4\u56de\u503c\u7c7b\u578b\u76f8\u5bb9，\u8fd9\u662f\u4e2a\u6bd4\u8f83\u51b7\u95e8\u7684\u8bed\u6cd5，\u4e00\u822c\u4e5f\u7528\u4e0d\u5230，\u8fd9\u91cc\u94c1\u6c41\u4eec\u4e86\u89e3\u4e0b\u5373\u53ef \u5982\u4e0b\u6240\u793a，\u8fd9\u91cc\u5b50\u7c7bCat\u91cd\u5199\u7236\u7c7bAnimal\u7684eat\u65b9\u6cd5，\u5b50\u7c7beat\u65b9\u6cd5\u8fd4\u56de\u7684\u662fCat\u7c7b\u578b\u7684，\u7236\u7c7beat\u65b9\u6cd5\u8fd4\u56de\u7684\u662fAnimal\u7c7b\u578b\u7684，\u5b50\u7c7b\u65b9\u6cd5\u8fd4\u56de\u7684\u7c7b\u578b\u662f\u7236\u7c7b\u65b9\u6cd5\u8fd4\u56de\u7c7b\u578b\u7684\u5b50\u7c7b，\u56e0\u6b64\u8fd9\u6837\u4e5f\u662f\u53ef\u884c\u7684，\u5982\u4e0b\u6240\u793a：<\/p>\n

    package<\/span> package2<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Animal<\/span> {<\/span>
    \n public<\/span> Animal<\/span> eat<\/span>(<\/span>)<\/span>{<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"Animal is eating"<\/span>)<\/span>;<\/span>
    \n return<\/span> this<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    package<\/span> package2<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Cat<\/span> extends<\/span> Animal<\/span>{<\/span>
    \n public<\/span> Cat<\/span> eat<\/span>(<\/span>)<\/span>{<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"Cat is eating"<\/span>)<\/span>;<\/span>
    \n return<\/span> this<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    package<\/span> package2<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Test<\/span> {<\/span>
    \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
    \n Animal<\/span> animal =<\/span> new<\/span> Animal<\/span>(<\/span>)<\/span>;<\/span>
    \n animal.<\/span>eat<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    animal =<\/span> new<\/span> Cat<\/span>(<\/span>)<\/span>;<\/span>
    \n animal.<\/span>eat<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/p>\n

    \u63a5\u4e0b\u6765\u662f\u6ce8\u89e3，\u5f53\u5b50\u7c7b\u91cd\u5199\u7236\u7c7b\u65b9\u6cd5\u7684\u65f6\u5019，\u6700\u597d\u5728\u4e0a\u9762\u52a0\u4e0a\u4e2a@Override\u6ce8\u89e3，\u6807\u6ce8\u8fd9\u4e2a\u65b9\u6cd5\u662f\u91cd\u5199\u7684，\u5bf9\u65b9\u6cd5\u505a\u4e00\u4e9b\u5408\u6cd5\u6027\u7684\u6821\u9a8c \u4f8b\u5982\u8fd9\u91cc\u7684\u5b50\u7c7b\u7684\u65b9\u6cd5\u540d\u6253\u9519\u4e86，\u8fd9\u91cc\u5e76\u4e0d\u4f1a\u62a5\u9519，\u56e0\u4e3a\u8fd9\u6837\u53ea\u662f\u76f8\u5f53\u4e8e\u6ca1\u6709\u8fdb\u884c\u65b9\u6cd5\u91cd\u5199 \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \u7a0b\u5e8f\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\u56fe，\u8fd9\u65f6\u5019\u5b50\u7c7b\u4e2d\u6ca1\u6709\u68c0\u6d4b\u51faeat\u65b9\u6cd5，\u5c31\u4f1a\u81ea\u52a8\u4f7f\u7528\u7236\u7c7b\u4e2d\u7684eat\u65b9\u6cd5，\u5c31\u4e0d\u662f\u6211\u4eec\u60f3\u8c03\u7528\u7684\u6548\u679c \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \u52a0\u4e86@Override\u540e，\u8fd9\u91cc\u5c31\u4f1a\u62a5\u9519，\u6211\u4eec\u770b\u62a5\u9519\u4fe1\u606f，\u8fd9\u4e2a\u65b9\u6cd5\u6ca1\u6709\u91cd\u5199\u5b83\u7684\u8d85\u7c7b（\u7236\u7c7b\u53c8\u79f0\u8d85\u7c7b）\u7684\u65b9\u6cd5，\u5c31\u4f1a\u63d0\u9192\u6211\u4eec \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/p>\n

    \u53e6\u5916，\u65b9\u6cd5\u91cd\u5199\u65f6，\u9700\u8981\u6211\u4eec\u5c3d\u91cf\u9075\u5b88\u5f00\u95ed\u539f\u5219，\u4e5f\u5c31\u662f\u5bf9\u4e8e\u4fee\u6539\u5173\u95ed，\u5bf9\u4e8e\u6269\u5c55\u5f00\u653e<\/p>\n

    \u5f00\u95ed\u539f\u5219\u7684\u6838\u5fc3\u5c31\u662f：\u5bf9\u4e8e\u5df2\u7ecf\u6295\u5165\u7684\u7c7b，\u5c3d\u91cf\u4e0d\u8981\u8fdb\u884c\u4fee\u6539，\u6700\u597d\u7684\u65b9\u5f0f\u662f\u91cd\u65b0\u5b9a\u4e49\u4e00\u4e2a\u7c7b，\u6765\u91cd\u590d\u5176\u4e2d\u5171\u6027\u7684\u5185\u5bb9，\u5e76\u4e14\u6dfb\u52a0\u6216\u8005\u6539\u52a8\u65b0\u7684\u5185\u5bb9<\/p>\n

    \u5c31\u6bd4\u5982\u624b\u673a\u901a\u4fe1，\u73b0\u5728\u7684\u65b0\u624b\u673a\u90fd\u666e\u904d\u663e\u793a\u5730\u533a，\u4f46\u65e9\u671f\u7684\u624b\u673a\u53ea\u663e\u793a\u53f7\u7801，\u90a3\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d，\u5c31\u4e0d\u8be5\u5728\u539f\u6765\u8001\u7684\u7c7b\u4e0a\u8fdb\u884c\u4fee\u6539，\u56e0\u4e3a\u53ef\u80fd\u8fd8\u6709\u4f7f\u7528\u8001\u5f0f\u624b\u673a\u7684\u4eba，\u5b83\u7684\u624b\u673a\u4e0a\u6ca1\u6709\u8fd9\u4e2a\u529f\u80fd，\u76f2\u76ee\u4fee\u6539\u7c7b，\u5c31\u4f1a\u5bfc\u81f4bug \u5e94\u8be5\u65b0\u5efa\u4e00\u4e2a\u624b\u673a\u7c7b，\u91cd\u5199\u65b9\u6cd5，\u65b0\u624b\u673a\u6765\u7535\u663e\u793a\u8fd9\u4e2a\u91cd\u5199\u7684\u65b9\u6cd5\u5373\u53ef \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    4，\u5411\u4e0a\u8f6c\u578b<\/h2>\n

    \u5411\u4e0a\u8f6c\u578b：\u7236\u7c7b\u5f15\u7528\u6307\u5411\u5b50\u7c7b\u5b9e\u4f8b<\/p>\n

    \u8fd9\u91cc\u662f\u4ee5\u5bf9\u8c61\u672c\u4f53\u6765\u770b\u7684，\u5bf9\u8c61\u662f\u5b50\u7c7b\u5bf9\u8c61，\u672c\u6765\u5e94\u8be5\u4f7f\u7528\u5b50\u7c7b\u5f15\u7528\u7684，\u4f7f\u7528\u4e86\u7236\u7c7b\u5f15\u7528，\u6240\u4ee5\u8bf4\u5c31\u662f\u5411\u4e0a\u8f6c\u578b<\/p>\n

    \u524d\u9762\u63d0\u5230\u7684\u591a\u6001\u5176\u5b9e\u90fd\u662f\u5411\u4e0a\u8f6c\u578b \u5e73\u65f6\u4f7f\u7528\u6700\u591a\u7684\u5c31\u662f\u4e0b\u9762\u8fd9\u79cd：<\/p>\n

    package<\/span> package1<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Test<\/span> {<\/span>
    \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
    \n Son<\/span> son =<\/span> new<\/span> Son<\/span>(<\/span>)<\/span>;<\/span>
    \n son.<\/span>eat<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    son =<\/span> new<\/span> XiaoMing<\/span>(<\/span>)<\/span>;<\/span>
    \n son.<\/span>eat<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    son =<\/span> new<\/span> Dog<\/span>(<\/span>)<\/span>;<\/span>
    \n son.<\/span>eat<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    }<\/span>
    \n}<\/span><\/p>\n

    \u524d\u9762\u63d0\u5230\u7684\u8fd9\u79cd\u5199\u6cd5\u4e5f\u662f\u591a\u6001（\u4f7f\u7528\u7236\u7c7b\u5f15\u7528\u6765\u8868\u793a\u5b50\u7c7b\u5bf9\u8c61）<\/p>\n

    package<\/span> package1<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Test<\/span> {<\/span>
    \n public<\/span> static<\/span> void<\/span> run<\/span>(<\/span>Son<\/span> son)<\/span>{<\/span>
    \n son.<\/span>eat<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
    \n run<\/span>(<\/span>new<\/span> Son<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
    \n run<\/span>(<\/span>new<\/span> XiaoMing<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
    \n run<\/span>(<\/span>new<\/span> Dog<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u5305\u62ec\u8fd9\u79cd\u5199\u6cd5，\u4e5f\u662f\u5411\u4e0a\u8f6c\u578b，\u53ea\u8981\u7236\u7c7b\u5f15\u7528\u6307\u5411\u5b50\u7c7b\u5bf9\u8c61\u7684，\u90fd\u662f\u5411\u4e0a\u8f6c\u578b<\/p>\n

    public<\/span> class<\/span> Test<\/span> {<\/span>
    \n public<\/span> static<\/span> Animal<\/span> createAnimal<\/span>(<\/span>)<\/span>{<\/span>
    \n return<\/span> new<\/span> Cat<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
    \n Animal<\/span> animal =<\/span> createAnimal<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    5，\u5411\u4e0b\u8f6c\u578b<\/h2>\n

    \u63a5\u7740\u662f\u5411\u4e0b\u8f6c\u578b，\u5411\u4e0b\u8f6c\u578b\u662f\u4f9d\u8d56\u5411\u4e0a\u8f6c\u578b\u7684，\u5e73\u5e38\u4e5f\u6bd4\u8f83\u5c11\u7528，\u8981\u6c42\u7236\u7c7b\u7684\u5f15\u7528\u5b9e\u9645\u4e0a\u6307\u5411\u7684\u662f\u5b50\u7c7b\u7684\u5b9e\u4f8b，\u5e76\u4e14\u9700\u8981\u52a0\u4e0a\u663e\u793a\u7684\u8f6c\u6362 \u5411\u4e0b\u8f6c\u578b\u8bf4\u767d\u4e86\u5c31\u662f\u7236\u7c7b\u5f15\u7528\u8d4b\u503c\u7ed9\u5b50\u7c7b\u5f15\u7528<\/p>\n

    public<\/span> class<\/span> Test<\/span> {<\/span>
    \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
    \n Animal<\/span> animal =<\/span> new<\/span> Cat<\/span>(<\/span>)<\/span>;<\/span>
    \n Cat<\/span> cat =<\/span> (<\/span>Cat<\/span>)<\/span> animal;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u4e0b\u9762\u8fd9\u79cd\u60c5\u51b5\u5c31\u5fc5\u987b\u4f7f\u7528\u5411\u4e0b\u8f6c\u578b，\u8fd9\u4e2a\u94c1\u6c41\u4eec\u4e86\u89e3\u4e0b\u5373\u53ef，\u4e00\u822c\u5f88\u5c11\u8fd9\u6837\u5199\u4ee3\u7801，\u6211\u4eec\u53ef\u4ee5\u501f\u6b64\u4e86\u89e3\u4e0b\u7f16\u8bd1\u5668\u7684\u68c0\u67e5\u89c4\u5219<\/p>\n

    \u94c1\u6c41\u4eec\u770b\u4e0b\u9762\u8fd9\u51e0\u6bb5\u4ee3\u7801，\u731c\u4e0b\u8fd9\u4e2a\u4f1a\u62a5\u9519\u5417？<\/p>\n

    package<\/span> package2<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Animal<\/span> {<\/span>
    \n public<\/span> void<\/span> eat<\/span>(<\/span>)<\/span>{<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"Animal is eating"<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    package<\/span> package2<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Cat<\/span> extends<\/span> Animal<\/span>{<\/span>
    \n public<\/span> void<\/span> eat<\/span>(<\/span>)<\/span>{<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"Cat is eating"<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    public<\/span> void<\/span> meow<\/span>(<\/span>)<\/span>{<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u55b5\u55b5\u55b5"<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    }<\/span><\/p>\n

    package<\/span> package2<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Test<\/span> {<\/span>
    \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
    \n Animal<\/span> animal =<\/span> new<\/span> Cat<\/span>(<\/span>)<\/span>;<\/span>
    \n animal.<\/span>meow<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u5176\u5b9e\u662f\u4f1a\u62a5\u9519\u7684，\u5982\u4e0b\u56fe，\u8fd9\u91cc\u663e\u793a\u5728Animal\u7c7b\u91cc\u9762\u627e\u4e0d\u5230\u8fd9\u4e2ameow()\u65b9\u6cd5 \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/p>\n

    \u53ef\u80fd\u6709\u7684\u94c1\u6c41\u5c31\u4f1a\u8bf4：\u4e0d\u5bf9\u5440，\u524d\u9762\u63d0\u5230\u7684\u52a8\u6001\u89c4\u5212\u4e2d\u8bf4JVM\u5728\u8fd0\u884c\u5230\u8fd9\u91cc\u65f6，\u4f1a\u5206\u6790\u8fd9\u4e2a\u5f15\u7528\u771f\u5b9e\u6307\u5411\u7684\u5bf9\u8c61\u7c7b\u578b，\u8fd9\u91cc\u771f\u5b9e\u6307\u5411\u7684\u5bf9\u8c61\u7c7b\u578b\u662fCat\u5440，\u90a3\u4e3a\u4ec0\u4e48\u4f1a\u62a5\u9519\u5728Animal\u7c7b\u4e2d\u627e\u4e0d\u5230\u8fd9\u4e2a\u65b9\u6cd5\u5462？<\/p>\n

    \u5176\u5b9e，\u8fd9\u4e2a\u9519\u8bef\u662f\u5728\u7f16\u8bd1\u5668\u7f16\u8bd1\u9636\u6bb5\u62a5\u7684\u9519\u8bef，\u5728\u7f16\u8bd1\u9636\u6bb5，\u770b\u5230animal\u5c31\u662f\u7236\u7c7b\u7c7b\u578b\u7684\u5f15\u7528，\u4e8e\u662f\u5c1d\u8bd5\u5728\u7236\u7c7b\u7c7b\u578b\u4e2d\u627emeow()，\u627e\u4e0d\u5230，\u5c31\u62a5\u9519\u4e86 \u7f16\u8bd1\u5668\u53ea\u505a\u6700\u57fa\u672c\u7684\u8bed\u6cd5\u68c0\u67e5，\u4e0d\u77e5\u9053\u4ee3\u7801\u7684\u903b\u8f91\u662f\u600e\u4e48\u6837\u7684，\u4e5f\u4e0d\u77e5\u9053\u4ee3\u7801\u662f\u5982\u4f55\u6267\u884c\u7684，\u65e0\u6cd5\u786e\u5b9aanimal\u7684\u771f\u662f\u7c7b\u578b，\u53ea\u80fd\u628aanimal\u5f53\u4f5c\u7236\u7c7b\u7684\u5f15\u7528<\/p>\n

    \u90a3\u4e48\u7f16\u8bd1\u5668\u62a5\u9519，\u4ee3\u7801\u5c31\u65e0\u6cd5\u6267\u884c\u4e86，\u52a8\u6001\u7ed1\u5b9a\u662f\u5728\u4ee3\u7801\u8fd0\u884c\u8d77\u6765\u8fdb\u884c\u7684<\/p>\n

    \u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898，\u5c31\u53ef\u4ee5\u4f9d\u9760\u5411\u4e0b\u8f6c\u578b，\u5c06\u7236\u7c7b\u5f15\u7528\u8d4b\u503c\u7ed9\u5b50\u7c7b\u5f15\u7528，\u5982\u4e0b\u6240\u793a：<\/p>\n

    public<\/span> class<\/span> Test<\/span> {<\/span>
    \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
    \n Animal<\/span> animal =<\/span> new<\/span> Cat<\/span>(<\/span>)<\/span>;<\/span>
    \n Cat<\/span> cat =<\/span> (<\/span>Cat<\/span>)<\/span>animal;<\/span>
    \n cat.<\/span>meow<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u53e6\u5916，\u5411\u4e0b\u8f6c\u578b\u7684\u65f6\u5019，\u9700\u8981\u786e\u4fdd\u7236\u7c7b\u5f15\u7528\u786e\u5b9e\u662f\u6307\u5411\u5b50\u7c7b\u5b9e\u4f8b\u7684，\u5426\u5219\u5c31\u7b97\u5f3a\u8f6c\u4e86，\u4e5f\u65e0\u6cd5\u8c03\u7528\u91cc\u9762\u7684\u65b9\u6cd5，\u5982\u4e0b\u6240\u793a，\u4f1a\u62a5\u51fa\u4e00\u4e2aClassCastException（\u7c7b\u578b\u8f6c\u5316\u5f02\u5e38）<\/p>\n

    public<\/span> class<\/span> Test<\/span> {<\/span>
    \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
    \n Animal<\/span> animal =<\/span> new<\/span> Animal<\/span>(<\/span>)<\/span>;<\/span>
    \n Cat<\/span> cat =<\/span> (<\/span>Cat<\/span>)<\/span>animal;<\/span>
    \n cat.<\/span>meow<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/p>\n

    \u5411\u4e0b\u8f6c\u578b\u5982\u679c\u60f3\u8981\u907f\u514d\u62a5\u51fa\u7c7b\u578b\u8f6c\u5316\u5f02\u5e38，\u53ef\u4ee5\u5199\u4e2aif\u5224\u65ad\u4e00\u4e0b，\u5229\u7528instaceof\u5224\u65ad\u4e0banimal\u5f15\u7528\u6307\u5411\u7684\u5bf9\u8c61\u662f\u4e0d\u662fCat\u7c7b\u578b\u7684，\u5982\u679c\u662f，\u624d\u8fdb\u884c\u5411\u4e0b\u8f6c\u578b \u5982\u4e0b\u6240\u793a<\/p>\n

    public<\/span> class<\/span> Test<\/span> {<\/span>
    \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
    \n Animal<\/span> animal =<\/span> new<\/span> Animal<\/span>(<\/span>)<\/span>;<\/span>
    \n if<\/span>(<\/span>animal instanceof<\/span> Cat<\/span>)<\/span>{<\/span>
    \n Cat<\/span> cat =<\/span> (<\/span>Cat<\/span>)<\/span>animal;<\/span>
    \n cat.<\/span>meow<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>else<\/span>{<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u7c7b\u578b\u4e0d\u5339\u914d"<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    6，\u591a\u6001\u7684\u4f18\u7f3a\u70b9\u5206\u6790<\/h2>\n

    \u591a\u6001\u7684\u4e3b\u8981\u4f18\u70b9\u5982\u4e0b：<\/p>\n

  • \u4fbf\u4e8e\u9488\u5bf9\u5df2\u6709\u7684\u4ee3\u7801\u8fdb\u884c\u6269\u5c55，\u540c\u65f6\u4e0d\u5f71\u54cd\u65e7\u7684\u903b\u8f91 <\/li>\n
  • \u964d\u4f4e\u4ee3\u7801\u7684\u201c\u5708\u590d\u6742\u5ea6\u201d <\/li>\n

    \u7b2c\u4e00\u70b9\u524d\u9762\u5df2\u7ecf\u63d0\u5230\u8fc7\u4e86，\u4fbf\u4e8e\u4ee3\u7801\u6269\u5c55，\u8fd9\u91cc\u5c31\u4e3b\u8981\u89e3\u6790\u4e0b\u7b2c\u4e8c\u70b9<\/p>\n

    \u201c\u5708\u590d\u6742\u5ea6\u201d\u5c31\u662f\u8861\u91cf\u4e00\u4e2a\u4ee3\u7801\/\u65b9\u6cd5，\u590d\u6742\u7a0b\u5ea6\u7684\u4e00\u79cd\u6307\u6807，\u628a\u4e00\u6bb5\u4ee3\u7801\u4e2d\u51fa\u73b0\u5206\u652f\u7684\u4e2a\u6570，\u79f0\u4e3a\u5708\u590d\u6742\u5ea6 \u5982\u679c\u4ee3\u7801\u662f\u4ece\u4e0a\u5230\u4e0b\u6267\u884c\u5b8c\u7684，\u5c31\u662f\u6700\u7b80\u5355\u7684\u4ee3\u7801，\u5708\u590d\u6742\u5ea6\u5c31\u662f1 \u5982\u679c\u4ee3\u7801\u4e2d\u7684\u6761\u4ef6\u3001\u5faa\u73af\u7279\u522b\u591a，\u800c\u4e14\u8fd8\u8fdb\u884c\u5d4c\u5957，\u90a3\u8fd9\u4e2a\u4ee3\u7801\u5708\u590d\u6742\u5ea6\u4e5f\u5c31\u5f88\u9ad8，\u7406\u89e3\u8d77\u6765\u5c31\u6709\u96be\u5ea6<\/p>\n

    \u4e00\u822c\u5728\u516c\u53f8\u4e2d，\u8981\u6c42\u6700\u597d\u5708\u590d\u6742\u5ea6\u57285\u4ee5\u4e0b，\u6700\u591a\u4e0d\u8d85\u8fc710<\/p>\n<\/p>\n

    \u90a3\u5982\u4f55\u4f7f\u7528\u591a\u6001，\u6765\u964d\u4f4e\u5708\u590d\u6742\u5ea6\u5462，\u793a\u4f8b\u5982\u4e0b（Windows\u8ba1\u7b97\u673a\u53ef\u4ee5\u6309win \u52a0\u4e0a >\u952e\u6765\u83b7\u53d6\u56fe\u6848）：<\/p>\n

    package<\/span> package3<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Shape<\/span> {<\/span>
    \n public<\/span> void<\/span> draw<\/span>(<\/span>)<\/span>{<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u6253\u5370\u5f62\u72b6"<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    package<\/span> package3<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Rect<\/span> extends<\/span> Shape<\/span>{<\/span>
    \n @Override<\/span>
    \n public<\/span> void<\/span> draw<\/span>(<\/span>)<\/span>{<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u25a1"<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    package<\/span> package3<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Circle<\/span> extends<\/span> Shape<\/span>{<\/span>
    \n @Override<\/span>
    \n public<\/span> void<\/span> draw<\/span>(<\/span>)<\/span>{<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"\u3007"<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    package<\/span> package3<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Flower<\/span> extends<\/span> Shape<\/span> {<\/span>
    \n @Override<\/span>
    \n public<\/span> void<\/span> draw<\/span>(<\/span>)<\/span>{<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"🌹"<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/p>\n

    \u6ce8：\u5728Java\u4e2d\u5b57\u7b26\u4e32\u7c7b\u578b\u5c31\u662fString（\u540e\u9762\u4f1a\u51fa\u4e00\u671f\u535a\u5ba2\u6765\u8be6\u7ec6\u89e3\u6790\u8fd9\u4e2a\u7c7b\u578b），\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u76f8\u540c\u4e0d\u80fd\u7528\u201c==\u201d，\u9700\u8981\u7528equals\u65b9\u6cd5\u6765\u5224\u65ad<\/p>\n

    package<\/span> package3<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Test<\/span> {<\/span>
    \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
    \n String<\/span>[<\/span>]<\/span> shapes =<\/span> {<\/span>"circle"<\/span>,<\/span>"rect"<\/span>,<\/span>"rect"<\/span>,<\/span>"flower"<\/span>}<\/span>;<\/span>
    \n for<\/span>(<\/span>String<\/span> shapeName :<\/span> shapes)<\/span>{<\/span>
    \n if<\/span>(<\/span>shapeName.<\/span>equals<\/span>(<\/span>"circle"<\/span>)<\/span>)<\/span>{<\/span>
    \n Shape<\/span> shape =<\/span> new<\/span> Circle<\/span>(<\/span>)<\/span>;<\/span>
    \n shape.<\/span>draw<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>else<\/span> if<\/span>(<\/span>shapeName.<\/span>equals<\/span>(<\/span>"rect"<\/span>)<\/span>)<\/span>{<\/span>
    \n Shape<\/span> shape =<\/span> new<\/span> Rect<\/span>(<\/span>)<\/span>;<\/span>
    \n shape.<\/span>draw<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>else<\/span> if<\/span>(<\/span>shapeName.<\/span>equals<\/span>(<\/span>"flower"<\/span>)<\/span>)<\/span>{<\/span>
    \n Shape<\/span> shape =<\/span> new<\/span> Flower<\/span>(<\/span>)<\/span>;<\/span>
    \n shape.<\/span>draw<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u6253\u5370\u7ed3\u679c\u5982\u4e0b： \u4ee3\u7801\u7684\u5708\u590d\u6742\u5ea6\u5c31\u662f4，\u5171\u67094\u4e2a\u5206\u652f，\u8fdb\u884cif\u5224\u65ad \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/p>\n

    \u5229\u7528\u591a\u6001，\u5c31\u53ef\u4ee5\u628a\u5708\u590d\u6742\u5ea6\u964d\u4e3a1，\u4ee3\u7801\u5982\u4e0b\u6240\u793a： \u76f4\u63a5\u641e\u4e00\u4e2a\u5bf9\u8c61\u6570\u7ec4，\u7136\u540e\u518d\u904d\u5386\u6574\u4e2a\u6570\u7ec4\u5373\u53ef，\u591a\u6001\u662f\u4e0d\u662f\u975e\u5e38\u725b<\/p>\n

    public<\/span> class<\/span> Test<\/span> {<\/span>
    \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
    \n Shape<\/span>[<\/span>]<\/span> shapes =<\/span> {<\/span>new<\/span> Circle<\/span>(<\/span>)<\/span>,<\/span>new<\/span> Rect<\/span>(<\/span>)<\/span>,<\/span>new<\/span> Rect<\/span>(<\/span>)<\/span>,<\/span>new<\/span> Flower<\/span>(<\/span>)<\/span>}<\/span>;<\/span>
    \n for<\/span>(<\/span>Shape<\/span> shape :<\/span> shapes)<\/span>{<\/span>
    \n shape.<\/span>draw<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n }<\/span><\/p>\n

    \u5176\u5b9e\u591a\u6001\u89e3\u51b3\u7684\u6838\u5fc3\u95ee\u9898，\u672c\u8d28\u4e0a\u662f\u5728\u5c01\u88c5\u7684\u57fa\u7840\u4e0a\u66f4\u8fdb\u4e00\u6b65\u4e86 \u5c01\u88c5\u662f\u4f7f\u7528\u8005\u4e0d\u77e5\u9053\u7c7b\u7684\u5185\u90e8\u5b9e\u73b0，\u5c31\u80fd\u4f7f\u7528，\u964d\u4f4e\u4f7f\u7528\u8005\u7684\u6210\u672c \u591a\u6001\u662f\u4f7f\u7528\u8005\u4e0d\u5149\u4e0d\u9700\u8981\u77e5\u9053\u7c7b\u7684\u5185\u90e8\u5b9e\u73b0，\u751a\u81f3\u90fd\u4e0d\u9700\u8981\u77e5\u9053\u7c7b\u7684\u771f\u5b9e\u7c7b\u578b，\u5c31\u53ef\u4ee5\u4f7f\u7528<\/p>\n<\/p>\n

    \u90a3\u591a\u6001\u6709\u4ec0\u4e48\u7f3a\u70b9\u5462？ \u90a3\u5c31\u662f\u7a0b\u5e8f\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d，\u6d88\u8017\u7684\u65f6\u95f4\u548c\u8017\u8d39\u7684\u7a7a\u95f4\u8d8a\u6765\u8d8a\u591a，\u56e0\u4e3a\u52a8\u6001\u7ed1\u5b9a\u662f\u9700\u8981\u4e00\u5b9a\u7684\u5f00\u9500\u7684，\u4f46\u662f\u73b0\u5728\u673a\u5668\u7684\u786c\u4ef6\u914d\u7f6e\u76f8\u6bd4\u4ee5\u524d\u6709\u4e86\u5f88\u5927\u7684\u63d0\u9ad8 \u56e0\u6b64，\u8fd9\u91cc\u7684\u7f3a\u70b9\u57fa\u672c\u4e0a\u53ef\u4ee5\u5ffd\u7565（\u50cfC++\u5c31\u662f\u628a\u6548\u7387\u53d1\u6325\u5230\u6781\u81f4\u7684\u8bed\u8a00）<\/p>\n

    7，\u521d\u59cb\u5316\u95ee\u9898<\/h2>\n

    \u94c1\u6c41\u4eec\u770b\u8fd9\u6837\u4e00\u4e2a\u7a0b\u5e8f： \u5b50\u7c7b\u91cd\u5199\u7236\u7c7b\u7684func()\u65b9\u6cd5，\u7236\u7c7b\u5728\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\u4e2d\u8c03\u7528\u4e86func()\u65b9\u6cd5，\u63a5\u7740\u5728main\u65b9\u6cd5\u4e2d\u521b\u5efa\u5b50\u7c7b\u5bf9\u8c61<\/p>\n

    package<\/span> package4<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Parent<\/span> {<\/span>
    \n public<\/span> Parent<\/span>(<\/span>)<\/span>{<\/span>
    \n func<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    public<\/span> void<\/span> func<\/span>(<\/span>)<\/span>{<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"Parent.func()"<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    package<\/span> package4<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Child<\/span> extends<\/span> Parent<\/span>{<\/span>
    \n public<\/span> Child<\/span>(<\/span>)<\/span>{<\/span><\/p>\n

    }<\/span>
    \n private<\/span> int<\/span> num =<\/span> 10<\/span>;<\/span><\/p>\n

    public<\/span> void<\/span> func<\/span>(<\/span>)<\/span>{<\/span>
    \n System<\/span>.<\/span>out.<\/span>println<\/span>(<\/span>"Child.func() : num = "<\/span> +<\/span> num)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    package<\/span> package4<\/span>;<\/span><\/p>\n

    public<\/span> class<\/span> Test<\/span> {<\/span>
    \n public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[<\/span>]<\/span> args)<\/span> {<\/span>
    \n Child<\/span> child =<\/span> new<\/span> Child<\/span>(<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u90a3\u8fd9\u91cc\u6267\u884cmain\u65b9\u6cd5\u540e，\u4f1a\u6253\u5370\u4ec0\u4e48 \u521b\u5efa\u5b50\u7c7b\u5bf9\u8c61，\u5728\u6267\u884c\u5b50\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u4e4b\u524d，\u4f1a\u5148\u6267\u884c\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5，\u6267\u884c \u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u65f6，\u5c31\u4f1a\u89e6\u53d1\u591a\u6001，\u5b9e\u9645\u4e0a\u6267\u884c\u5b50\u7c7b\u7684\u7248\u672c \u6267\u884c\u7ed3\u679c\u5982\u4e0b： \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n<\/p>\n

    \u8fd9\u91cc\u6267\u884c\u7684\u662f\u5b50\u7c7b\u7684func\u65b9\u6cd5\u6ca1\u9519，\u4f46\u662f\u6253\u5370\u51fa\u7684num\u7684\u503c\u5374\u662f0，\u8fd9\u662f\u4e3a\u4ec0\u4e48\u5462？<\/p>\n

    \u56e0\u4e3a\u6b64\u5904\u7684\u6253\u5370，\u662f\u5728Parent\u7684\u6784\u9020\u4e2d\u8c03\u7528\u7684，\u8fd9\u65f6\u5019Child\u91cc\u9762\u7684\u5c5e\u6027\u8fd8\u6ca1\u6709\u8fdb\u884c\u521d\u59cb\u5316\u5462，\u6b64\u5904\u770b\u5230\u76840，\u5c31\u662fJVM\u7533\u8bf7\u5185\u5b58\u65f6，\u81ea\u52a8\u586b\u5145\u76840，\u90a3\u8fd9\u91cc\u6253\u5370\u7684\u7ed3\u679c\u5c31\u662f\u9519\u8bef\u7684<\/p>\n

    \u4f7f\u7528\u591a\u6001\u7684\u65f6\u5019，\u8981\u6ce8\u610f，\u4e0d\u8981\u5728\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u4e2d\u53bb\u89e6\u53d1\u591a\u6001，\u56e0\u4e3a\u7236\u7c7b\u6784\u9020\u65b9\u6cd5\u6267\u884c\u7684\u65f6\u5019，\u5b50\u7c7b\u7684\u5c5e\u6027\u8fd8\u6ca1\u6709\u521d\u59cb\u5316，\u6b64\u65f6\u6267\u884c\u5b50\u7c7b\u7684\u65b9\u6cd5，\u4f7f\u7528\u5b50\u7c7b\u7684\u5c5e\u6027，\u4e5f\u5c31\u5904\u4e8e\u201c\u672a\u521d\u59cb\u5316\u201d\u7684\u72b6\u6001\u4e2d<\/p>\n

    \u7ed3\u8bed💕💕<\/h2>\n

    \u5230\u73b0\u5728，Java\u7684\u4e09\u5927\u7279\u5f81（\u591a\u6001，\u5c01\u88c5，\u7ee7\u627f）\u5df2\u7ecf\u5168\u90e8\u89e3\u6790\u5b8c\u4e86，\u8fd9\u90e8\u5206\u4e1c\u897f\u53ef\u80fd\u6709\u7684\u4e1c\u897f\u7a0d\u5fae\u6709\u70b9\u62bd\u8c61，\u5b66\u8d77\u6765\u4e0d\u77e5\u9053\u6709\u4ec0\u4e48\u5b9e\u7528\u4ef7\u503c，\u8fd9\u662f\u5f88\u6b63\u5e38\u7684 \u540e\u9762\u5199\u5b8c\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3\u7684\u535a\u5ba2\u540e，\u535a\u4e3b\u4f1a\u5199\u4e00\u4e2a\u7b80\u5355\u7684\u56fe\u4e66\u7ba1\u7406\u7cfb\u7edf\u7684\u89e3\u6790\u535a\u5ba2，\u5728\u91cc\u9762\u4f1a\u4f7f\u7528\u5404\u79cdJavaSE\u7684\u57fa\u7840\u5185\u5bb9，\u6700\u597d\u7684\u7406\u89e3\u65b9\u6cd5\u4e0d\u662f\u786c\u8bb0\u6982\u5ff5，\u800c\u662f\u5728\u9879\u76ee\u4ee3\u7801\u4e2d\u7406\u89e3🐵\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

    \u4ee5\u4e0a\u5c31\u662f\u4eca\u5929\u7684\u6240\u6709\u5185\u5bb9\u5566～\u5b8c\u7ed3\u6492\u82b1～🥳🎉🎉<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u524d\u8a00\u2764\ufe0f\u2764\ufe0f hello hello💕，\u8fd9\u91cc\u662f\u6d0b\u4e0d\u5199bug~😄，\u6b22\u8fce\u5927\u5bb6\u70b9\u8d5e👍👍，\u5173\u6ce8😍😍，\u6536\u85cf🌹🌹 \u591a\u6001\u662fJava\u5165\u95e8\u7684\u4e00\u4e2a\u91cd\u70b9，\u591a\u6001\u662f Java \u505a\u9879\u76ee\u6700\u6838\u5fc3\u3001\u6700\u9ad8\u9891\u3001\u5fc5\u7528\u7684\u7279\u6027\u4e4b\u4e00，\u9879\u76ee\u4e2d\u57fa\u672c\u4e0a\u5230\u5904\u90fd\u662f\u591a\u6001，\u8fd9\u7bc7\u535a\u5ba2\u5c31\u4f1a\u8be6\u7ec6\u7684\u89e3\u6790\u591a\u6001\u7684\u7528\u6cd5\u548c\u6ce8\u610f\u4e8b<\/p>\n","protected":false},"author":2,"featured_media":93583,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[99,190],"topic":[],"class_list":["post-93598","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-java","tag-190"],"yoast_head":"\nJava\u591a\u6001\u57fa\u7840\u5168\u9762\u89e3\u6790\uff0c\u52a8\u6001\u7ed1\u5b9a\uff0c\u6ce8\u610f\u4e8b\u9879\uff0c\u5411\u4e0a\u548c\u5411\u4e0b\u8f6c\u578b\uff0c\u770b\u5b8c\u5305\u61c2\uff01 - 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