{"id":202724,"date":"2025-05-22T10:58:08","date_gmt":"2025-05-22T02:58:08","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202724\/"},"modified":"2025-05-22T10:58:08","modified_gmt":"2025-05-22T02:58:08","slug":"java%e5%87%bd%e6%95%b0%e5%a6%82%e4%bd%95%e8%bf%90%e7%94%a8%e5%a4%9a%e6%80%81%e6%80%a7%e5%a2%9e%e5%bc%ba%e4%bb%a3%e7%a0%81%e5%8f%af%e5%a4%8d%e7%94%a8%e6%80%a7%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202724\/","title":{"rendered":"Java\u51fd\u6570\u5982\u4f55\u8fd0\u7528\u591a\u6001\u6027\u589e\u5f3a\u4ee3\u7801\u53ef\u590d\u7528\u6027\uff1f"},"content":{"rendered":"

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

Java\u51fd\u6570\u5982\u4f55\u8fd0\u7528\u591a\u6001\u6027\u589e\u5f3a\u4ee3\u7801\u53ef\u590d\u7528\u6027\uff1f<\/h1>\n

\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u6211\u4eec\u8981\u52aa\u529b\u5b66\u4e60\u5566\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u300aJava\u51fd\u6570\u5982\u4f55\u8fd0\u7528\u591a\u6001\u6027\u589e\u5f3a\u4ee3\u7801\u53ef\u590d\u7528\u6027\uff1f\u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4e0b\u6587\u4e2d\u7684\u5185\u5bb9\u6211\u4eec\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5728\u9605\u8bfb\u672c\u6587\u8fc7\u7a0b\u4e2d\u6709\u9047\u5230\u4e0d\u6e05\u695a\u7684\u5730\u65b9\uff0c\u6b22\u8fce\u7559\u8a00\u5440\uff01\u6211\u4eec\u4e00\u8d77\u8ba8\u8bba\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n

\u591a\u6001\u6027\u5728 Java \u4e2d\u901a\u8fc7\u51fd\u6570\u91cd\u5199\u548c\u65b9\u6cd5\u91cd\u8f7d\u5b9e\u73b0\uff1a\u51fd\u6570\u91cd\u5199\uff1a\u5b50\u7c7b\u91cd\u5b9a\u4e49\u7236\u7c7b\u540c\u540d\u65b9\u6cd5\uff0c\u8c03\u7528\u65f6\u6267\u884c\u5b50\u7c7b\u65b9\u6cd5\uff0c\u589e\u5f3a\u4ee3\u7801\u53ef\u590d\u7528\u6027\u3002\u65b9\u6cd5\u91cd\u8f7d\uff1a\u540c\u7c7b\u4e2d\u5b9a\u4e49\u591a\u4e2a\u540c\u540d\u65b9\u6cd5\uff0c\u53c2\u6570\u7c7b\u578b\u6216\u6570\u91cf\u4e0d\u540c\uff0c\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u8f93\u5165\uff0c\u6267\u884c\u76f8\u540c\u57fa\u672c\u64cd\u4f5c\u3002\u5b9e\u6218\u6848\u4f8b\uff1a\u7535\u5b50\u5546\u52a1\u7cfb\u7edf\u4e2d\u4f7f\u7528\u591a\u6001\u6027\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u4ea7\u54c1\u7684\u51fd\u6570\uff0c\u4fdd\u6301\u4ee3\u7801\u53ef\u590d\u7528\u6027\uff0c\u589e\u5f3a\u53ef\u6269\u5c55\u6027\u3002<\/p>\n

<\/p>\n

\u5229\u7528\u591a\u6001\u6027\u589e\u5f3a Java \u51fd\u6570\u7684\u53ef\u590d\u7528\u6027<\/strong><\/p>\n

\u591a\u6001\u6027\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b (OOP) \u4e2d\u7684\u4e00\u9879\u91cd\u8981\u7279\u6027\uff0c\u5b83\u5141\u8bb8\u5b50\u7c7b\u5bf9\u8c61\u4ee5\u4e0e\u7236\u7c7b\u5bf9\u8c61\u76f8\u540c\u7684\u65b9\u5f0f\u88ab\u4f7f\u7528\u3002\u8fd9\u6781\u5927\u5730\u589e\u5f3a\u4e86\u4ee3\u7801\u7684\u53ef\u590d\u7528\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002\u5728 Java \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u51fd\u6570\u91cd\u5199\u548c\u65b9\u6cd5\u91cd\u8f7d\u6765\u5b9e\u73b0\u591a\u6001\u6027\u3002<\/p>\n

\u51fd\u6570\u91cd\u5199<\/strong><\/p>\n

\u51fd\u6570\u91cd\u5199\u5141\u8bb8\u5b50\u7c7b\u5b9a\u4e49\u4e0e\u5176\u7236\u7c7b\u5177\u6709\u76f8\u540c\u540d\u79f0\u548c\u7b7e\u540d\u7684\u65b9\u6cd5\u3002\u5f53\u8c03\u7528\u91cd\u5199\u7684\u65b9\u6cd5\u65f6\uff0c\u5c06\u8c03\u7528\u5b50\u7c7b\u7684\u65b9\u6cd5\uff0c\u5373\u4f7f\u5f15\u7528\u53d8\u91cf\u4e3a\u7236\u7c7b\u7c7b\u578b\u3002<\/p>\n

\u4ee3\u7801\u793a\u4f8b\uff1a<\/strong><\/p>\n

class Animal {\n    public void makeSound() {\n        System.out.println(\"Animal makes a sound\");\n    }\n}\n\nclass Dog extends Animal {\n    @Override\n    public void makeSound() {\n        System.out.println(\"Dog barks\");\n    }\n}\n\npublic class Main {\n    public static void main(String[] args) {\n        Animal animal = new Dog();\n        animal.makeSound(); \/\/ \u8f93\u51fa: Dog barks\n    }\n}<\/pre>\n
\u65b9\u6cd5\u91cd\u8f7d<\/strong><\/p>\n
\u65b9\u6cd5\u91cd\u8f7d\u5141\u8bb8\u5728\u4e00\u4e2a\u7c7b\u4e2d\u5b9a\u4e49\u5177\u6709\u76f8\u540c\u540d\u79f0\u4f46\u53c2\u6570\u7c7b\u578b\u6216\u6570\u91cf\u4e0d\u540c\u7684\u591a\u4e2a\u65b9\u6cd5\u3002\u8fd9\u5141\u8bb8\u60a8\u7f16\u5199\u53ef\u4ee5\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u8f93\u5165\u4f46\u6267\u884c\u76f8\u540c\u57fa\u672c\u64cd\u4f5c\u7684\u65b9\u6cd5\u3002<\/p>\n
\u4ee3\u7801\u793a\u4f8b\uff1a<\/strong><\/p>\n
class Calculator {\n    public int add(int a, int b) {\n        return a + b;\n    }\n\n    public double add(double a, double b) {\n        return a + b;\n    }\n}\n\npublic class Main {\n    public static void main(String[] args) {\n        Calculator calculator = new Calculator();\n        System.out.println(calculator.add(1, 2)); \/\/ \u8f93\u51fa: 3\n        System.out.println(calculator.add(1.5, 2.5)); \/\/ \u8f93\u51fa: 4.0\n    }\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u5728\u4e00\u4e2a\u7535\u5b50\u5546\u52a1\u7cfb\u7edf\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u6001\u6027\u6765\u521b\u5efa\u53ef\u7528\u4e8e\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u4ea7\u54c1\u7684\u7075\u6d3b\u4e14\u53ef\u6269\u5c55\u7684\u51fd\u6570\uff1a<\/p>\n
class Product {\n    public void calculatePrice() {\n        \/\/ \u901a\u7528\u4ef7\u683c\u8ba1\u7b97\u903b\u8f91\n    }\n}\n\nclass Book extends Product {\n    @Override\n    public void calculatePrice() {\n        \/\/ \u9488\u5bf9\u4e66\u7c4d\u7684\u7279\u5b9a\u4ef7\u683c\u8ba1\u7b97\u903b\u8f91\n    }\n}\n\nclass Toy extends Product {\n    @Override\n    public void calculatePrice() {\n        \/\/ \u9488\u5bf9\u73a9\u5177\u7684\u7279\u5b9a\u4ef7\u683c\u8ba1\u7b97\u903b\u8f91\n    }\n}\n\npublic class Main {\n    public static void main(String[] args) {\n        Product book = new Book();\n        book.calculatePrice(); \/\/ \u8c03\u7528\u9488\u5bf9\u4e66\u7c4d\u7684\u7279\u5b9a\u903b\u8f91\n\n        Product toy = new Toy();\n        toy.calculatePrice(); \/\/ \u8c03\u7528\u9488\u5bf9\u73a9\u5177\u7684\u7279\u5b9a\u903b\u8f91\n    }\n}<\/pre>\n
\u901a\u8fc7\u5229\u7528\u591a\u6001\u6027\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u4ee3\u7801\u53ef\u590d\u7528\u7684\u51fd\u6570\uff0c\u53ef\u4ee5\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u4ea7\u54c1\uff0c\u540c\u65f6\u4fdd\u6301\u4ee3\u7801\u7b80\u6d01\u4e14\u6613\u4e8e\u7ef4\u62a4\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Java\u51fd\u6570\u5982\u4f55\u8fd0\u7528\u591a\u6001\u6027\u589e\u5f3a\u4ee3...<\/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-202724","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202724","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=202724"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202724\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202724"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202724"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202724"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}