{"id":202577,"date":"2025-05-22T09:04:52","date_gmt":"2025-05-22T01:04:52","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202577\/"},"modified":"2025-05-22T09:04:52","modified_gmt":"2025-05-22T01:04:52","slug":"%e5%a6%82%e4%bd%95%e9%87%8d%e8%bd%bdjava%e5%87%bd%e6%95%b0%e4%bb%a5%e5%ae%9e%e7%8e%b0%e5%a4%9a%e6%80%81%e6%80%a7%e7%9a%84%e6%9c%80%e4%bd%b3%e5%ae%9e%e8%b7%b5%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202577\/","title":{"rendered":"\u5982\u4f55\u91cd\u8f7dJava\u51fd\u6570\u4ee5\u5b9e\u73b0\u591a\u6001\u6027\u7684\u6700\u4f73\u5b9e\u8df5\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u91cd\u8f7dJava\u51fd\u6570\u4ee5\u5b9e\u73b0\u591a\u6001\u6027\u7684\u6700\u4f73\u5b9e\u8df5\uff1f<\/h1>\n

\u76ee\u524d\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u5173\u4e8e\u6587\u7ae0<\/span>\u7684\u6587\u7ae0\u4e86\uff0c\u81ea\u5df1\u5728\u521d\u6b21\u9605\u8bfb\u8fd9\u4e9b\u6587\u7ae0\u4e2d\uff0c\u4e5f\u89c1\u8bc6\u5230\u4e86\u5f88\u591a\u5b66\u4e60\u601d\u8def\uff1b\u90a3\u4e48\u672c\u6587\u300a\u5982\u4f55\u91cd\u8f7dJava\u51fd\u6570\u4ee5\u5b9e\u73b0\u591a\u6001\u6027\u7684\u6700\u4f73\u5b9e\u8df5\uff1f\u300b<\/span>\uff0c\u4e5f\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u5982\u679c\u9605\u8bfb\u5b8c\u540e\u771f\u7684\u5bf9\u4f60\u5b66\u4e60\u6587\u7ae0<\/span>\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u52a8\u52a8\u624b\u6307\uff0c\u8bc4\u8bba\u7559\u8a00\u5e76\u5206\u4eab~<\/p>\n

\u51fd\u6570\u91cd\u8f7d\u662f\u4e00\u79cd\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d\u4f7f\u7528\u76f8\u540c\u540d\u79f0\u4f46\u4e0d\u540c\u53c2\u6570\u6216\u53c2\u6570\u7c7b\u578b\u5b9a\u4e49\u591a\u4e2a\u51fd\u6570\u7684\u6280\u672f\uff0c\u7528\u4e8e\u5b9e\u73b0\u591a\u6001\u6027\u3002\u6700\u4f73\u5b9e\u8df5\u5305\u62ec\uff1a\u5b9a\u4e49\u6e05\u6670\u7684\u53c2\u6570\u7b7e\u540d\u3001\u9075\u5faa\u6700\u5c0f\u7279\u6743\u539f\u5219\u3001\u63d0\u4f9b\u5408\u7406\u7684\u9ed8\u8ba4\u503c\u3001\u907f\u514d\u521b\u5efa\u8fc7\u4e8e\u76f8\u4f3c\u7684\u51fd\u6570\u548c\u6587\u6863\u8bb0\u5f55\u91cd\u8f7d\u51fd\u6570\u3002\u5b9e\u6218\u6848\u4f8b\uff1a\u51e0\u4f55\u5f62\u72b6\u7c7b\u5c42\u6b21\u7ed3\u6784\u4e2d\uff0cShape \u57fa\u7c7b\u5b9a\u4e49\u4e86\u83b7\u53d6\u9762\u79ef\u7684 getArea() \u65b9\u6cd5\uff0c\u5b50\u7c7b Circle \u548c Rectangle \u91cd\u8f7d\u8be5\u65b9\u6cd5\u6839\u636e\u5f62\u72b6\u516c\u5f0f\u8ba1\u7b97\u9762\u79ef\uff0c\u4f53\u73b0\u4e86\u591a\u6001\u6027\u7684\u4f18\u52bf\u3002<\/p>\n

<\/p>\n

Java \u4e2d\u51fd\u6570\u91cd\u8f7d\u7684\u6700\u4f73\u5b9e\u8df5\uff0c\u5b9e\u73b0\u591a\u6001\u6027\u7684\u5229\u5668<\/h2>\n

\u4ec0\u4e48\u662f\u51fd\u6570\u91cd\u8f7d\uff1f<\/strong><\/p>\n

\u51fd\u6570\u91cd\u8f7d\u662f\u4e00\u79cd\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d\u4f7f\u7528\u76f8\u540c\u540d\u79f0\u4f46\u4e0d\u540c\u53c2\u6570\u6216\u53c2\u6570\u7c7b\u578b\u5b9a\u4e49\u591a\u4e2a\u51fd\u6570\u7684\u6280\u672f\u3002\u8fd9\u5141\u8bb8\u6211\u4eec\u5728\u4e0d\u540c\u7684\u60c5\u51b5\u4e0b\u4f7f\u7528\u76f8\u540c\u7684\u51fd\u6570\u540d\uff0c\u589e\u5f3a\u4e86\u7a0b\u5e8f\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n

\u6700\u4f73\u5b9e\u8df5<\/strong><\/p>\n

1. \u5b9a\u4e49\u6e05\u6670\u7684\u53c2\u6570\u7b7e\u540d<\/h3>\n

\u6bcf\u4e2a\u91cd\u8f7d\u51fd\u6570\u7684\u53c2\u6570\u7b7e\u540d\uff08\u540d\u79f0\u3001\u7c7b\u578b\u3001\u987a\u5e8f\uff09\u5e94\u8be5\u72ec\u4e00\u65e0\u4e8c\u3002\u8fd9\u6709\u52a9\u4e8e\u7f16\u8bd1\u5668\u533a\u5206\u4e0d\u540c\u7684\u51fd\u6570\uff0c\u907f\u514d\u6b67\u4e49\u3002<\/p>\n

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

public class Calculator {\n\n    \/\/ \u91cd\u8f7d\u52a0\u6cd5\u51fd\u6570\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}<\/pre>\n
2. \u9075\u5faa\u6700\u5c0f\u7279\u6743\u539f\u5219<\/h3>\n
\u5728\u91cd\u8f7d\u51fd\u6570\u65f6\uff0c\u53c2\u6570\u7c7b\u578b\u5e94\u8be5\u5c3d\u53ef\u80fd\u5177\u4f53\uff0c\u4ec5\u5305\u542b\u8be5\u51fd\u6570\u6240\u9700\u7684\u6700\u5c0f\u4fe1\u606f\u3002\u8fd9\u53ef\u4ee5\u9632\u6b62\u4e0d\u5fc5\u8981\u7684\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u548c\u4ee3\u7801\u6df7\u4e71\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/strong><\/p>\n
\/\/ **\u9519\u8bef\uff1a** \u53c2\u6570\u7c7b\u578b\u8fc7\u4e8e\u5bbd\u6cdb\uff0c\u53ef\u80fd\u51fa\u73b0\u7cbe\u5ea6\u635f\u5931\npublic double calculateAverage(List<Object> numbers) { ... }\n\n\/\/ **\u6b63\u786e\uff1a** \u53c2\u6570\u7c7b\u578b\u5177\u4f53\u5230\u6240\u9700\u6570\u636e\u7c7b\u578b\npublic double calculateAverage(List<Double> numbers) { ... }<\/pre>\n
3. \u63d0\u4f9b\u5408\u7406\u7684\u9ed8\u8ba4\u503c<\/h3>\n
\u5728\u9002\u5f53\u7684\u60c5\u51b5\u4e0b\uff0c\u4e3a\u91cd\u8f7d\u51fd\u6570\u63d0\u4f9b\u5408\u7406\u7684\u9ed8\u8ba4\u53c2\u6570\u503c\u3002\u8fd9\u53ef\u4ee5\u7b80\u5316\u51fd\u6570\u8c03\u7528\uff0c\u5e76\u4e14\u6709\u52a9\u4e8e\u9632\u6b62\u4f20\u53c2\u9519\u8bef\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/strong><\/p>\n
public void printInfo(String name, String email, String phone) {\n    \/\/ \u9ed8\u8ba4\u503c\u4e3a\u7a7a\u5b57\u7b26\u4e32\n    System.out.println(name + \" | \" + email + \" | \" + phone);\n}\n\n\/\/ \u8c03\u7528\u793a\u4f8b\uff08\u7701\u7565\u975e\u9ed8\u8ba4\u53c2\u6570\uff09\nprintInfo(\"John Doe\", null, \"123-456-7890\");<\/pre>\n
4. \u907f\u514d\u521b\u5efa\u8fc7\u4e8e\u76f8\u4f3c\u7684\u51fd\u6570<\/h3>\n
\u91cd\u8f7d\u51fd\u6570\u4e0d\u5e94\u5b8c\u5168\u91cd\u590d\u3002\u5982\u679c\u4e24\u4e2a\u51fd\u6570\u4e4b\u95f4\u7684\u5dee\u5f02\u5f88\u5c0f\uff0c\u8003\u8651\u4f7f\u7528\u65b9\u6cd5\u91cd\u5199\u6216\u59d4\u6258\u6a21\u5f0f\u6765\u5b9e\u73b0\u6240\u9700\u7684\u5dee\u5f02\u5316\u529f\u80fd\u3002<\/p>\n
5. \u6587\u6863\u8bb0\u5f55\u91cd\u8f7d\u51fd\u6570<\/h3>\n
\u5728\u7c7b\u7684 JavaDoc \u6ce8\u91ca\u4e2d\u6e05\u695a\u5730\u8bb0\u5f55\u91cd\u8f7d\u51fd\u6570\uff0c\u5305\u62ec\u6bcf\u4e2a\u51fd\u6570\u7684\u76ee\u7684\u548c\u53c2\u6570\u542b\u4e49\u3002\u8fd9\u5bf9\u4e8e\u5176\u4ed6\u5f00\u53d1\u4eba\u5458\u7406\u89e3\u548c\u4f7f\u7528\u4ee3\u7801\u81f3\u5173\u91cd\u8981\u3002<\/p>\n
\u5b9e\u6218\u6848\u4f8b<\/h2>\n
\u8003\u8651\u4e00\u4e2a\u7b80\u5355\u7684\u51e0\u4f55\u5f62\u72b6\u7c7b\u5c42\u6b21\u7ed3\u6784\u3002Shape<\/code> \u57fa\u7c7b\u5b9a\u4e49\u4e86\u83b7\u53d6\u5f62\u72b6\u9762\u79ef\u7684 getArea()<\/code> \u65b9\u6cd5\u3002\u5b50\u7c7b Circle<\/code> \u548c Rectangle<\/code> \u91cd\u8f7d\u8be5\u65b9\u6cd5\uff0c\u6839\u636e\u5176\u7279\u5b9a\u5f62\u72b6\u516c\u5f0f\u8ba1\u7b97\u9762\u79ef\u3002<\/p>\n
public abstract class Shape {\n    public abstract double getArea();\n}\n\npublic class Circle extends Shape {\n    private double radius;\n\n    public Circle(double radius) {\n        this.radius = radius;\n    }\n\n    @Override\n    public double getArea() {\n        return Math.PI * radius * radius;\n    }\n}\n\npublic class Rectangle extends Shape {\n    private double width;\n    private double height;\n\n    public Rectangle(double width, double height) {\n        this.width = width;\n        this.height = height;\n    }\n\n    @Override\n    public double getArea() {\n        return width * height;\n    }\n}\n\n\/\/ \u5728\u4e3b\u7c7b\u4e2d\u4f7f\u7528\npublic class Main {\n    public static void main(String[] args) {\n        Shape circle = new Circle(5);\n        System.out.println(\"\u5706\u7684\u9762\u79ef\uff1a\" + circle.getArea()); \/\/ 78.5398\n\n        Shape rectangle = new Rectangle(4, 3);\n        System.out.println(\"\u77e9\u5f62\u7684\u9762\u79ef\uff1a\" + rectangle.getArea()); \/\/ 12.0\n    }\n}<\/pre>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u91cd\u8f7d\u7684 getArea()<\/code> \u65b9\u6cd5\u5141\u8bb8\u6211\u4eec\u4f7f\u7528\u76f8\u540c\u7684\u65b9\u6cd5\u8c03\u7528\u8ba1\u7b97\u4e0d\u540c\u5f62\u72b6\u7684\u9762\u79ef\uff0c\u4f53\u73b0\u4e86\u591a\u6001\u6027\u7684\u4f18\u52bf\u3002<\/p>\n
\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u5982\u4f55\u91cd\u8f7dJava\u51fd\u6570\u4ee5\u5b9e\u73b0\u591a\u6001\u6027\u7684\u6700\u4f73\u5b9e\u8df5\uff1f\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u591a\u6001\u6027,\u91cd\u8f7d\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u91cd\u8f7dJava\u51fd\u6570\u4ee5\u5b9e\u73b0\u591a\u6001\u6027...<\/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-202577","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202577","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=202577"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202577\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202577"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202577"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202577"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}