{"id":203063,"date":"2025-05-22T11:36:07","date_gmt":"2025-05-22T03:36:07","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203063\/"},"modified":"2025-05-22T11:36:07","modified_gmt":"2025-05-22T03:36:07","slug":"%e5%9c%a8java%e4%b8%ad%ef%bc%8c%e9%87%8d%e8%bd%bd%e5%87%bd%e6%95%b0%e5%92%8c%e6%96%b9%e6%b3%95%e9%87%8d%e5%86%99%e4%b9%8b%e9%97%b4%e7%9a%84%e5%85%b3%e9%94%ae%e5%8c%ba%e5%88%ab%e6%98%af%e4%bb%80","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203063\/","title":{"rendered":"\u5728Java\u4e2d\uff0c\u91cd\u8f7d\u51fd\u6570\u548c\u65b9\u6cd5\u91cd\u5199\u4e4b\u95f4\u7684\u5173\u952e\u533a\u522b\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5728Java\u4e2d\uff0c\u91cd\u8f7d\u51fd\u6570\u548c\u65b9\u6cd5\u91cd\u5199\u4e4b\u95f4\u7684\u5173\u952e\u533a\u522b\u662f\u4ec0\u4e48\uff1f<\/h1>\n

\u7f16\u7a0b\u5e76\u4e0d\u662f\u4e00\u4e2a\u673a\u68b0\u6027\u7684\u5de5\u4f5c\uff0c\u800c\u662f\u9700\u8981\u6709\u601d\u8003\uff0c\u6709\u521b\u65b0\u7684\u5de5\u4f5c\uff0c\u8bed\u6cd5\u662f\u56fa\u5b9a\u7684\uff0c\u4f46\u89e3\u51b3\u95ee\u9898\u7684\u601d\u8def\u5219\u662f\u4f9d\u9760\u4eba\u7684\u601d\u7ef4\uff0c\u8fd9\u5c31\u9700\u8981\u6211\u4eec\u575a\u6301\u5b66\u4e60\u548c\u66f4\u65b0\u81ea\u5df1\u7684\u77e5\u8bc6\u3002\u4eca\u5929\u5c31\u6574\u7406\u5206\u4eab\u300a\u5728Java\u4e2d\uff0c\u91cd\u8f7d\u51fd\u6570\u548c\u65b9\u6cd5\u91cd\u5199\u4e4b\u95f4\u7684\u5173\u952e\u533a\u522b\u662f\u4ec0\u4e48\uff1f\u300b\uff0c\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\uff0c\u5982\u679c\u4f60\u5bf9\u6587\u7ae0\u65b9\u9762\u7684\u77e5\u8bc6\u70b9\u611f\u5174\u8da3\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\uff0c\u5728\u8fd9\u53ef\u4ee5\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5f00\u53d1\u80fd\u529b\u7684\u63d0\u5347\u3002<\/p>\n

\u91cd\u8f7d\u51fd\u6570\u548c\u65b9\u6cd5\u91cd\u5199\u662f Java \u4e2d\u4fee\u6539\u51fd\u6570\u884c\u4e3a\u7684\u4e24\u79cd\u5173\u952e\u6982\u5ff5\u3002\u91cd\u8f7d\u51fd\u6570\u5728\u540c\u4e00\u7c7b\u4e2d\u5177\u6709\u76f8\u540c\u540d\u79f0\u4f46\u53c2\u6570\u5217\u8868\u4e0d\u540c\u7684\u591a\u4e2a\u51fd\u6570\uff0c\u800c\u65b9\u6cd5\u91cd\u5199\u5728\u5b50\u7c7b\u4e2d\u91cd\u65b0\u5b9a\u4e49\u7236\u7c7b\u65b9\u6cd5\uff0c\u5177\u6709\u76f8\u540c\u540d\u79f0\u548c\u53c2\u6570\u5217\u8868\u3002\u5173\u952e\u533a\u522b\u5728\u4e8e\uff1a\u91cd\u8f7d\u51fd\u6570\u7528\u4e8e\u4e0d\u540c\u529f\u80fd\uff0c\u91cd\u5199\u51fd\u6570\u7528\u4e8e\u4fee\u6539\u884c\u4e3a\uff0c\u91cd\u8f7d\u51fd\u6570\u53c2\u6570\u5217\u8868\u4e0d\u540c\uff0c\u91cd\u5199\u51fd\u6570\u53c2\u6570\u5217\u8868\u76f8\u540c\uff0c\u91cd\u5199\u51fd\u6570\u8bbf\u95ee\u6743\u9650\u66f4\u5bbd\u677e\uff0c\u91cd\u5199\u51fd\u6570\u53ef\u629b\u51fa\u66f4\u5177\u4f53\u7684\u5f02\u5e38\u3002<\/p>\n

<\/p>\n

\u5728 Java \u4e2d\uff0c\u91cd\u8f7d\u51fd\u6570\u548c\u65b9\u6cd5\u91cd\u5199\u4e4b\u95f4\u7684\u5173\u952e\u533a\u522b<\/strong><\/p>\n

\u5728 Java \u7f16\u7a0b\u4e2d\uff0c\u91cd\u8f7d\u51fd\u6570\u548c\u65b9\u6cd5\u91cd\u5199\u662f\u4e24\u4e2a\u5e38\u89c1\u4e14\u91cd\u8981\u7684\u6982\u5ff5\u3002\u867d\u7136\u5b83\u4eec\u90fd\u6d89\u53ca\u4fee\u6539\u73b0\u6709\u51fd\u6570\u6216\u65b9\u6cd5\u7684\u884c\u4e3a\uff0c\u4f46\u5b83\u4eec\u5177\u6709\u4e0d\u540c\u7684\u542b\u4e49\u548c\u5b9e\u73b0\u65b9\u5f0f\u3002\u672c\u6587\u5c06\u63a2\u8ba8\u91cd\u8f7d\u51fd\u6570\u548c\u65b9\u6cd5\u91cd\u5199\u4e4b\u95f4\u7684\u5173\u952e\u533a\u522b\uff0c\u5e76\u63d0\u4f9b\u5b9e\u6218\u6848\u4f8b\u4ee5\u66f4\u6df1\u5165\u5730\u7406\u89e3\u3002<\/p>\n

\u91cd\u8f7d\u51fd\u6570<\/strong><\/p>\n

\u91cd\u8f7d\u51fd\u6570\u6307\u5728\u540c\u4e00\u7c7b\u4e2d\u5177\u6709\u76f8\u540c\u540d\u79f0\u7684\u591a\u4e2a\u51fd\u6570\uff0c\u4f46\u5177\u6709\u4e0d\u540c\u7684\u53c2\u6570\u5217\u8868\u3002\u8fd9\u610f\u5473\u7740\u8fd9\u4e9b\u51fd\u6570\u6267\u884c\u4e0d\u540c\u7684\u64cd\u4f5c\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u4f20\u9012\u7ed9\u5b83\u4eec\u7684\u7279\u5b9a\u53c2\u6570\u3002\u4f8b\u5982\uff0c\u8003\u8651\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n

class Math {\n\n    public int sum(int a, int b) {\n        return a + b;\n    }\n\n    public double sum(double a, double b) {\n        return a + b;\n    }\n}<\/pre>\n
\u5728\u4e0a\u9762\u793a\u4f8b\u4e2d\uff0csum<\/code> \u51fd\u6570\u88ab\u91cd\u8f7d\u4e86\u3002\u5b83\u6709\u4e24\u4e2a\u7248\u672c\uff1a\u4e00\u4e2a\u7248\u672c\u63a5\u53d7\u4e24\u4e2a\u6574\u578b\u53c2\u6570\u5e76\u8fd4\u56de\u6574\u578b\u548c\uff0c\u53e6\u4e00\u4e2a\u7248\u672c\u63a5\u53d7\u4e24\u4e2a\u53cc\u7cbe\u5ea6\u53c2\u6570\u5e76\u8fd4\u56de\u53cc\u7cbe\u5ea6\u548c\u3002\u7531\u4e8e\u5b83\u4eec\u5177\u6709\u4e0d\u540c\u7684\u53c2\u6570\u5217\u8868\uff0c\u8fd9\u4e24\u4e2a\u51fd\u6570\u53ef\u4ee5\u5171\u5b58\u4e8e\u540c\u4e00\u4e2a\u7c7b\u4e2d\u3002<\/p>\n
\u65b9\u6cd5\u91cd\u5199<\/strong><\/p>\n
\u65b9\u6cd5\u91cd\u5199\u6307\u7684\u662f\u5728\u5b50\u7c7b\u4e2d\u91cd\u65b0\u5b9a\u4e49\u7236\u7c7b\u4e2d\u5b9a\u4e49\u7684\u65b9\u6cd5\u3002\u5b50\u7c7b\u4e2d\u7684\u65b9\u6cd5\u4e0e\u7236\u7c7b\u4e2d\u7684\u65b9\u6cd5\u5177\u6709\u76f8\u540c\u7684\u540d\u79f0\u548c\u53c2\u6570\u5217\u8868\uff0c\u4f46\u5177\u6709\u4e0d\u540c\u7684\u5b9e\u73b0\u3002\u4f8b\u5982\uff0c\u8003\u8651\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
class Parent {\n\n    public void print() {\n        System.out.println(\"Parent class\");\n    }\n}\n\nclass Child extends Parent {\n\n    @Override\n    public void print() {\n        System.out.println(\"Child class\");\n    }\n}<\/pre>\n
\u5728\u4e0a\u9762\u793a\u4f8b\u4e2d\uff0cprint<\/code> \u65b9\u6cd5\u5728\u5b50\u7c7b Child<\/code> \u4e2d\u91cd\u5199\u3002\u5b83\u8986\u76d6\u4e86\u7236\u7c7b Parent<\/code> \u4e2d\u7684 print<\/code> \u65b9\u6cd5\uff0c\u5f53\u5b50\u7c7b\u5bf9\u8c61\u8c03\u7528 print<\/code> \u65b9\u6cd5\u65f6\uff0c\u4f1a\u6267\u884c\u5b50\u7c7b\u7684\u5b9e\u73b0\u3002<\/p>\n
\u5173\u952e\u533a\u522b<\/strong><\/p>\n
\u4ee5\u4e0b\u662f\u91cd\u8f7d\u51fd\u6570\u548c\u65b9\u6cd5\u91cd\u5199\u4e4b\u95f4\u7684\u5173\u952e\u533a\u522b\uff1a<\/p>\n
    \n
  • \u76ee\u6807\uff1a<\/strong>\u91cd\u8f7d\u51fd\u6570\u7528\u4e8e\u5728\u540c\u4e00\u7c7b\u4e2d\u63d0\u4f9b\u5177\u6709\u4e0d\u540c\u529f\u80fd\u7684\u51fd\u6570\uff0c\u800c\u65b9\u6cd5\u91cd\u5199\u7528\u4e8e\u5728\u5b50\u7c7b\u4e2d\u4fee\u6539\u7236\u7c7b\u4e2d\u7684\u51fd\u6570\u884c\u4e3a\u3002<\/li>\n
  • \u53c2\u6570\u5217\u8868\uff1a<\/strong>\u91cd\u8f7d\u51fd\u6570\u5fc5\u987b\u5177\u6709\u4e0d\u540c\u7684\u53c2\u6570\u5217\u8868\uff0c\u800c\u65b9\u6cd5\u91cd\u5199\u5fc5\u987b\u5177\u6709\u4e0e\u7236\u7c7b\u65b9\u6cd5\u76f8\u540c\u7684\u53c2\u6570\u5217\u8868\u3002<\/li>\n
  • \u8bbf\u95ee\u6743\u9650\uff1a<\/strong>\u91cd\u5199\u7684\u65b9\u6cd5\u53ef\u4ee5\u5177\u6709\u6bd4\u7236\u7c7b\u65b9\u6cd5\u66f4\u5bbd\u677e\u7684\u8bbf\u95ee\u6743\u9650\uff08public\u3001protected \u6216 package \u79c1\u6709\uff09\uff0c\u4f46\u4e0d\u80fd\u66f4\u4e25\u683c\uff08private\uff09\u3002<\/li>\n
  • \u629b\u51fa\u5f02\u5e38\uff1a<\/strong>\u91cd\u5199\u7684\u65b9\u6cd5\u53ef\u4ee5\u629b\u51fa\u4e0e\u7236\u7c7b\u65b9\u6cd5\u76f8\u540c\u7684\u5f02\u5e38\u6216\u5b50\u7c7b\u5f02\u5e38\uff0c\u4f46\u4e0d\u80fd\u629b\u51fa\u66f4\u901a\u7528\u7684\u5f02\u5e38\u3002<\/li>\n<\/ul>\n
    \u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
    \u4e0b\u9762\u662f\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b\uff0c\u6f14\u793a\u4e86\u91cd\u8f7d\u51fd\u6570\u548c\u65b9\u6cd5\u91cd\u5199\uff1a<\/p>\n
    class Animal {\n\n    public void speak() {\n        System.out.println(\"Animal speaks\");\n    }\n}\n\nclass Dog extends Animal {\n\n    @Override\n    public void speak() {\n        System.out.println(\"Dog barks\");\n    }\n\n    public void speak(String name) {\n        System.out.println(name + \" barks\");\n    }\n}\n\npublic class Main {\n\n    public static void main(String[] args) {\n        Animal animal = new Animal();\n        animal.speak();  \/\/ \u8f93\u51fa: Animal speaks\n\n        Dog dog = new Dog();\n        dog.speak();  \/\/ \u8f93\u51fa: Dog barks\n        dog.speak(\"Buddy\");  \/\/ \u8f93\u51fa: Buddy barks\n    }\n}<\/pre>\n
    \u5728\u8fd9\u4e2a\u6848\u4f8b\u4e2d\uff0cspeak<\/code> \u51fd\u6570\u5728 Animal<\/code> \u7c7b\u4e2d\u6700\u521d\u88ab\u5b9a\u4e49\uff0c\u5e76\u5728 Dog<\/code> \u7c7b\u4e2d\u91cd\u5199\u3002speak<\/code> \u51fd\u6570\u5728 Dog<\/code> \u7c7b\u4e2d\u4e5f\u88ab\u91cd\u8f7d\uff0c\u6dfb\u52a0\u4e86\u4e00\u4e2a\u63a5\u53d7\u5b57\u7b26\u4e32\u53c2\u6570\u7684\u65b0\u7248\u672c\u3002\u901a\u8fc7\u6b64\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u91cd\u8f7d\u51fd\u6570\u548c\u65b9\u6cd5\u91cd\u5199\u5982\u4f55\u7528\u4e8e\u4fee\u6539\u548c\u6269\u5c55\u7c7b\u884c\u4e3a\u3002<\/p>\n
    \u672c\u7bc7\u5173\u4e8e\u300a\u5728Java\u4e2d\uff0c\u91cd\u8f7d\u51fd\u6570\u548c\u65b9\u6cd5\u91cd\u5199\u4e4b\u95f4\u7684\u5173\u952e\u533a\u522b\u662f\u4ec0\u4e48\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5728Java\u4e2d\uff0c\u91cd\u8f7d\u51fd\u6570\u548c\u65b9\u6cd5\u91cd\u5199...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203063","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203063","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203063"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203063\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203063"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203063"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203063"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}