{"id":53403,"date":"2025-08-12T10:39:50","date_gmt":"2025-08-12T02:39:50","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/53403.html"},"modified":"2025-08-12T10:39:50","modified_gmt":"2025-08-12T02:39:50","slug":"java%e4%b8%ad%ef%bc%8c%e9%87%8d%e5%86%99%e4%b8%8e%e9%87%8d%e8%bd%bd%e6%9c%89%e4%bb%80%e4%b9%88%e5%8c%ba%e5%88%ab%ef%bc%88%e8%af%a6%e8%a7%a3%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/53403.html","title":{"rendered":"Java\u4e2d\uff0c\u91cd\u5199\u4e0e\u91cd\u8f7d\u6709\u4ec0\u4e48\u533a\u522b\uff08\u8be6\u89e3\uff09"},"content":{"rendered":"<p>\u5b9a\u4e49&#xff1a;\u5b50\u7c7b\u5bf9\u7236\u7c7b\u4e2d\u5df2\u6709\u7684\u65b9\u6cd5\u8fdb\u884c\u91cd\u65b0\u5b9e\u73b0&#xff0c;\u4fdd\u6301\u65b9\u6cd5\u540d\u3001\u53c2\u6570\u5217\u8868\u548c\u8fd4\u56de\u503c\u7c7b\u578b\u5b8c\u5168\u4e00\u81f4&#xff0c;\u4ee5\u9002\u5e94\u5b50\u7c7b\u81ea\u8eab\u7684\u4e1a\u52a1\u903b\u8f91\u3002<\/p>\n<p>\u6838\u5fc3\u7279\u70b9&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u53d1\u751f\u4f4d\u7f6e&#xff1a;\u5b58\u5728\u7ee7\u627f\u5173\u7cfb\u7684\u7236\u7c7b\u4e0e\u5b50\u7c7b\u4e4b\u95f4<\/p>\n<\/li>\n<li>\n<p>\u65b9\u6cd5\u7b7e\u540d&#xff1a;\u65b9\u6cd5\u540d\u3001\u53c2\u6570\u5217\u8868&#xff08;\u7c7b\u578b\u3001\u987a\u5e8f\u3001\u6570\u91cf&#xff09;\u5fc5\u987b\u5b8c\u5168\u76f8\u540c<\/p>\n<\/li>\n<li>\n<p>\u8fd4\u56de\u503c\u7c7b\u578b&#xff1a;<\/p>\n<\/li>\n<li>\n<p>\u57fa\u672c\u7c7b\u578b&#xff1a;\u5fc5\u987b\u4e0e\u7236\u7c7b\u5b8c\u5168\u4e00\u81f4<\/p>\n<\/li>\n<li>\n<p>\u5f15\u7528\u7c7b\u578b&#xff1a;\u5141\u8bb8\u662f\u7236\u7c7b\u8fd4\u56de\u503c\u7c7b\u578b\u7684\u5b50\u7c7b&#xff08;\u534f\u53d8\u8fd4\u56de\u7c7b\u578b&#xff0c;Java 5 &#043; \u652f\u6301&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u8bbf\u95ee\u4fee\u9970\u7b26&#xff1a;\u5b50\u7c7b\u91cd\u5199\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\u4e0d\u80fd\u6bd4\u7236\u7c7b\u66f4\u4e25\u683c&#xff08;\u5982\u7236\u7c7b\u662fpublic&#xff0c;\u5b50\u7c7b\u4e0d\u80fd\u662fprotected&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u5f02\u5e38\u5904\u7406&#xff1a;\u5b50\u7c7b\u629b\u51fa\u7684\u5f02\u5e38\u4e0d\u80fd\u6bd4\u7236\u7c7b\u66f4\u5bbd\u6cdb&#xff08;\u53ef\u4ee5\u662f\u76f8\u540c\u6216\u66f4\u5c0f\u8303\u56f4\u7684\u5f02\u5e38&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u5173\u952e\u5b57&#xff1a;\u5e38\u4e0e&#064;Override\u6ce8\u89e3\u914d\u5408\u4f7f\u7528&#xff08;\u975e\u5fc5\u9700&#xff0c;\u4f46\u63a8\u8350&#xff0c;\u7528\u4e8e\u7f16\u8bd1\u65f6\u68c0\u67e5&#xff09;<\/p>\n<\/li>\n<\/ul>\n<p>\u793a\u4f8b&#xff1a;<\/p>\n<p>java<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Animal<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">makeSound<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u52a8\u7269\u53d1\u51fa\u58f0\u97f3&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Dog<\/span> <span class=\"token keyword\">extends<\/span> <span class=\"token class-name\">Animal<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u91cd\u5199\u7236\u7c7b\u65b9\u6cd5<\/span><br \/>\n    <span class=\"token annotation punctuation\">&#064;Override<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">makeSound<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u72d7\u53eb&#xff1a;\u6c6a\u6c6a\u6c6a&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u4f5c\u7528&#xff1a;\u5b9e\u73b0\u8fd0\u884c\u65f6\u591a\u6001&#xff08;\u52a8\u6001\u7ed1\u5b9a&#xff09;&#xff0c;\u5373\u7a0b\u5e8f\u8fd0\u884c\u65f6\u6839\u636e\u5bf9\u8c61\u7684\u5b9e\u9645\u7c7b\u578b\u8c03\u7528\u5bf9\u5e94\u7684\u65b9\u6cd5\u3002<\/p>\n<h4>2. 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class=\"token keyword\">class<\/span> <span class=\"token class-name\">Calculator<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u91cd\u8f7d1&#xff1a;\u4e24\u4e2aint\u76f8\u52a0<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u91cd\u8f7d2&#xff1a;\u4e09\u4e2aint\u76f8\u52a0&#xff08;\u53c2\u6570\u6570\u91cf\u4e0d\u540c&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> b<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> c<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b <span class=\"token operator\">&#043;<\/span> c<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u91cd\u8f7d3&#xff1a;\u4e24\u4e2adouble\u76f8\u52a0&#xff08;\u53c2\u6570\u7c7b\u578b\u4e0d\u540c&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">double<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">double<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">double<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u91cd\u8f7d4&#xff1a;int\u548cdouble\u76f8\u52a0&#xff08;\u53c2\u6570\u987a\u5e8f\u9690\u542b\u7c7b\u578b\u4e0d\u540c&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">double<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">double<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u4f5c\u7528&#xff1a;\u5b9e\u73b0\u7f16\u8bd1\u65f6\u591a\u6001&#xff08;\u9759\u6001\u7ed1\u5b9a&#xff09;&#xff0c;\u5373\u7f16\u8bd1\u65f6\u6839\u636e\u65b9\u6cd5\u53c2\u6570\u51b3\u5b9a\u8c03\u7528\u54ea\u4e2a\u7248\u672c\u7684\u65b9\u6cd5&#xff0c;\u63d0\u9ad8\u4ee3\u7801\u7075\u6d3b\u6027\u3002<\/p>\n<h4>3. 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