{"id":202730,"date":"2025-05-22T09:06:56","date_gmt":"2025-05-22T01:06:56","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202730\/"},"modified":"2025-05-22T09:06:56","modified_gmt":"2025-05-22T01:06:56","slug":"%e5%a6%82%e4%bd%95%e9%87%8d%e8%bd%bdjava%e5%87%bd%e6%95%b0%e4%bb%a5%e6%89%a7%e8%a1%8c%e4%b8%8d%e5%90%8c%e7%9a%84%e4%bb%bb%e5%8a%a1%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202730\/","title":{"rendered":"\u5982\u4f55\u91cd\u8f7dJava\u51fd\u6570\u4ee5\u6267\u884c\u4e0d\u540c\u7684\u4efb\u52a1\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u91cd\u8f7dJava\u51fd\u6570\u4ee5\u6267\u884c\u4e0d\u540c\u7684\u4efb\u52a1\uff1f<\/h1>\n

\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300a\u5982\u4f55\u91cd\u8f7dJava\u51fd\u6570\u4ee5\u6267\u884c\u4e0d\u540c\u7684\u4efb\u52a1\uff1f\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n

Java \u91cd\u8f7d\u51fd\u6570\u5141\u8bb8\u521b\u5efa\u5177\u6709\u76f8\u540c\u540d\u79f0\u4f46\u4e0d\u540c\u53c2\u6570\u7b7e\u540d\u7684\u51fd\u6570\uff0c\u7528\u4e8e\u6267\u884c\u4e0d\u540c\u7684\u4efb\u52a1\uff1a\u8bed\u6cd5\uff1a<returnType> <methodName>(<parameters>) { }\uff0c\u6bcf\u4e2a\u91cd\u8f7d\u51fd\u6570\u5fc5\u987b\u5177\u6709\u552f\u4e00\u7684\u53c2\u6570\u7b7e\u540d\u3002\u5b9e\u6218\u6848\u4f8b\uff1a\u521b\u5efa Shape \u7c7b\uff0c\u5176\u4e2d\u5305\u542b\u6839\u636e\u53c2\u6570\u7c7b\u578b\u8ba1\u7b97\u6b63\u65b9\u5f62\u3001\u77e9\u5f62\u6216\u5706\u9762\u79ef\u7684\u91cd\u8f7d getArea \u51fd\u6570\u3002\u8c03\u7528\uff1a\u4f7f\u7528 shape.getArea() \u8ba1\u7b97\u6b63\u65b9\u5f62\u9762\u79ef\uff0cshape.getArea(radius) \u8ba1\u7b97\u5706\u9762\u79ef\u3002<\/p>\n

<\/p>\n

\u5982\u4f55\u5728 Java \u4e2d\u91cd\u8f7d\u51fd\u6570\u4ee5\u6267\u884c\u4e0d\u540c\u7684\u4efb\u52a1<\/strong><\/p>\n

\u91cd\u8f7d\u51fd\u6570\u662f Java \u4e2d\u7684\u4e00\u9879\u5f3a\u5927\u529f\u80fd\uff0c\u5b83\u5141\u8bb8\u521b\u5efa\u5177\u6709\u76f8\u540c\u540d\u79f0\u4f46\u5177\u6709\u4e0d\u540c\u53c2\u6570\u7b7e\u540d\u7684\u591a\u4e2a\u51fd\u6570\u3002\u8fd9\u5728\u9700\u8981\u51fd\u6570\u6267\u884c\u4e0d\u540c\u4efb\u52a1\u65f6\u975e\u5e38\u6709\u7528\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u4f20\u5165\u7684\u53c2\u6570\u7c7b\u578b\u3002<\/p>\n

\u8bed\u6cd5<\/strong><\/p>\n

Java \u4e2d\u51fd\u6570\u91cd\u8f7d\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

<return_type> <method_name>(<parameters>) {\n  \/\/ \u51fd\u6570\u4f53\n}<\/pre>\n
\u6bcf\u4e2a\u91cd\u8f7d\u7684\u51fd\u6570\u5fc5\u987b\u5177\u6709\u4e00\u4e2a\u60df\u4e00\u7684\u53c2\u6570\u7b7e\u540d\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u4eec\u5fc5\u987b\u5177\u6709\u4e0d\u540c\u7684\u53c2\u6570\u7c7b\u578b\u6216\u6570\u91cf\u3002<\/p>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u8ba9\u6211\u4eec\u521b\u5efa\u4e00\u4e2a Shape<\/code> \u7c7b\u6765\u6f14\u793a\u91cd\u8f7d\u51fd\u6570\uff1a<\/p>\n
class Shape {\n  double length;\n  double width;\n\n  \/\/ \u8ba1\u7b97\u6b63\u65b9\u5f62\u6216\u77e9\u5f62\u7684\u9762\u79ef\n  double getArea() {\n    if (width == 0) {\n      return length * length; \/\/ \u6b63\u65b9\u5f62\n    } else {\n      return length * width; \/\/ \u77e9\u5f62\n    }\n  }\n\n  \/\/ \u8ba1\u7b97\u5706\u7684\u9762\u79ef (\u91cd\u8f7d)\n  double getArea(double radius) {\n    if (radius <= 0) {\n      throw new IllegalArgumentException(\"Radius cannot be less than or equal to zero\");\n    }\n    return Math.PI * radius * radius;\n  }\n}<\/pre>\n
\u8c03\u7528<\/strong><\/p>\n
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u8c03\u7528\u91cd\u8f7d\u7684 getArea<\/code> \u51fd\u6570\uff1a<\/p>\n
Shape shape = new Shape();\nshape.length = 5;\nshape.width = 3;\n\n\/\/ \u8ba1\u7b97\u6b63\u65b9\u5f62\u7684\u9762\u79ef\ndouble squareArea = shape.getArea();\nSystem.out.println(\"\u6b63\u65b9\u5f62\u9762\u79ef\uff1a\" + squareArea); \/\/ \u8f93\u51fa\uff1a25.0\n\n\/\/ \u8ba1\u7b97\u5706\u7684\u9762\u79ef\ndouble circleArea = shape.getArea(10.0);\nSystem.out.println(\"\u5706\u7684\u9762\u79ef\uff1a\" + circleArea); \/\/ \u8f93\u51fa\uff1a314.1592653589793<\/pre>\n
\u603b\u800c\u8a00\u4e4b\uff0c\u91cd\u8f7d\u51fd\u6570\u662f\u63cf\u8ff0\u5177\u6709\u4e0d\u540c\u529f\u80fd\u6216\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u53c2\u6570\u7684\u51fd\u6570\u7684\u5b9d\u8d35\u6280\u672f\u3002\u901a\u8fc7\u4f7f\u7528\u91cd\u8f7d\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u8f7b\u677e\u5730\u7f16\u5199\u53ef\u8bfb\u6027\u5f3a\u4e14\u53ef\u91cd\u7528\u7684\u4ee3\u7801\u3002<\/p>\n
\u4eca\u5929\u5173\u4e8e\u300a\u5982\u4f55\u91cd\u8f7dJava\u51fd\u6570\u4ee5\u6267\u884c\u4e0d\u540c\u7684\u4efb\u52a1\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u91cd\u8f7dJava\u51fd\u6570\u4ee5\u6267\u884c\u4e0d\u540c\u7684...<\/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-202730","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202730","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=202730"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202730\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202730"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202730"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}