{"id":202533,"date":"2025-05-22T10:28:12","date_gmt":"2025-05-22T02:28:12","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202533\/"},"modified":"2025-05-22T10:28:12","modified_gmt":"2025-05-22T02:28:12","slug":"java%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%af%e7%94%a8%e6%80%a7%e5%a6%82%e4%bd%95%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202533\/","title":{"rendered":"Java\u51fd\u6570\u7684\u53ef\u7528\u6027\u5982\u4f55\uff1f"},"content":{"rendered":"

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

Java\u51fd\u6570\u7684\u53ef\u7528\u6027\u5982\u4f55\uff1f<\/h1>\n

\u5c0f\u4f19\u4f34\u4eec\u5bf9\u6587\u7ae0\u7f16\u7a0b\u611f\u5174\u8da3\u5417\uff1f\u662f\u5426\u6b63\u5728\u5b66\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff1f\u5982\u679c\u662f\uff0c\u90a3\u4e48\u672c\u6587\u300aJava\u51fd\u6570\u7684\u53ef\u7528\u6027\u5982\u4f55\uff1f\u300b\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff0c\u672c\u7bc7\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\u3002\u5728\u4e4b\u540e\u7684\u6587\u7ae0\u4e2d\u4e5f\u4f1a\u591a\u591a\u5206\u4eab\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

Java \u51fd\u6570\u901a\u8fc7\u5c01\u88c5\u4ee3\u7801\u63d0\u9ad8\u53ef\u8bfb\u6027\uff0c\u53ef\u58f0\u660e\u4e3a void \u6216\u6570\u636e\u7c7b\u578b\uff0c\u5e76\u53ef\u4f7f\u7528\u53c2\u6570\u548c\u8fd4\u56de\u8fd4\u56de\u503c\u3002\u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26\u63a7\u5236\u51fd\u6570\u53ef\u89c1\u6027\uff0c\u53c2\u6570\u5141\u8bb8\u4f20\u9012\u6570\u636e\u3002\u901a\u8fc7\u5b9e\u6218\u6848\u4f8b\uff0c\u6211\u4eec\u5c55\u793a\u4e86\u5229\u7528\u51fd\u6570\u5982\u4f55\u589e\u5f3a\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u91cd\u7528\u6027\u3002<\/p>\n

<\/p>\n

Java \u51fd\u6570\u7684\u53ef\u7528\u6027\uff1a\u5de7\u5999\u4f7f\u7528\u51fd\u6570\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027<\/strong><\/p>\n

\u524d\u8a00<\/strong><\/p>\n

\u51fd\u6570\u662f Java \u4e2d\u4ee3\u7801\u91cd\u7528\u7684\u57fa\u672c\u6784\u5efa\u5757\u3002\u901a\u8fc7\u5c06\u4ee3\u7801\u5c01\u88c5\u5728\u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3001\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u91cd\u7528\u6027\u3002\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u63a2\u8ba8 Java \u51fd\u6570\u7684\u53ef\u7528\u6027\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528\u5b83\u4eec\uff0c\u5e76\u901a\u8fc7\u5b9e\u6218\u6848\u4f8b\u8fdb\u884c\u8bf4\u660e\u3002<\/p>\n

\u51fd\u6570\u7684\u58f0\u660e\u548c\u8c03\u7528<\/strong><\/p>\n

\u51fd\u6570\u5728 Java \u4e2d\u901a\u8fc7\u5173\u952e\u5b57 void<\/code> \u6216\u6570\u636e\u7c7b\u578b\uff08\u5982 int<\/code>\u3001String<\/code>\uff09\u8fdb\u884c\u58f0\u660e\uff0c\u540e\u8ddf\u51fd\u6570\u540d\u548c\u62ec\u53f7\u3002\u62ec\u53f7\u5185\u6307\u5b9a\u51fd\u6570\u7684\u53c2\u6570\uff08\u5982\u679c\u6709\u7684\u8bdd\uff09\u3002\u4ee5\u4e0b\u662f\u51fd\u6570\u58f0\u660e\u7684\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n

public static void main(String[] args) {\n    printHello();\n}\n\npublic static void printHello() {\n    System.out.println(\"Hello, world!\");\n}<\/pre>\n
\u8981\u8c03\u7528\u51fd\u6570\uff0c\u53ea\u9700\u4f7f\u7528\u5176\u51fd\u6570\u540d\u548c\u53c2\u6570\uff08\u5982\u679c\u6709\u7684\u8bdd\uff09\u3002\u4ee5\u4e0b\u662f\u51fd\u6570\u8c03\u7528\u7684\u793a\u4f8b\uff1a<\/p>\n
printHello();<\/pre>\n
\u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26<\/strong><\/p>\n
\u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26\uff08\u5982 public<\/code>\u3001private<\/code> \u548c protected<\/code>\uff09\u7528\u4e8e\u6307\u5b9a\u51fd\u6570\u7684\u53ef\u89c1\u6027\u3002public<\/code> \u51fd\u6570\u5bf9\u6240\u6709\u7c7b\u90fd\u53ef\u89c1\uff0cprivate<\/code> \u51fd\u6570\u4ec5\u5bf9\u58f0\u660e\u5b83\u4eec\u7684\u7c7b\u53ef\u89c1\uff0c\u800c protected<\/code> \u51fd\u6570\u5bf9\u58f0\u660e\u5b83\u4eec\u7684\u7c7b\u53ca\u5176\u5b50\u7c7b\u53ef\u89c1\u3002<\/p>\n
\u53c2\u6570<\/strong><\/p>\n
\u51fd\u6570\u7684\u53c2\u6570\u5141\u8bb8\u5728\u8c03\u7528\u51fd\u6570\u65f6\u4f20\u9012\u6570\u636e\u3002\u53c2\u6570\u7531\u6570\u636e\u7c7b\u578b\u3001\u53c2\u6570\u540d\u548c\u9017\u53f7\u5206\u9694\u3002\u4ee5\u4e0b\u662f\u5e26\u53c2\u6570\u7684\u51fd\u6570\u58f0\u660e\u793a\u4f8b\uff1a<\/p>\n
public static void printHello(String name) {\n    System.out.println(\"Hello, \" + name + \"!\");\n}<\/pre>\n
\u8fd4\u56de\u503c<\/strong><\/p>\n
void<\/code> \u51fd\u6570\u4e0d\u8fd4\u56de\u503c\uff0c\u800c\u5177\u6709\u6570\u636e\u7c7b\u578b\u7684\u51fd\u6570\u53ef\u4ee5\u8fd4\u56de\u503c\u3002\u8fd4\u56de\u503c\u7c7b\u578b\u5728\u51fd\u6570\u58f0\u660e\u4e2d\u6307\u5b9a\u3002\u4ee5\u4e0b\u662f\u5e26\u8fd4\u56de\u503c\u7684\u51fd\u6570\u58f0\u660e\u793a\u4f8b\uff1a<\/p>\n
public static String getGreeting(String name) {\n    return \"Hello, \" + name + \"!\";\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5b9e\u6218\u6848\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u5229\u7528 Java \u51fd\u6570\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u91cd\u7528\u6027\uff1a<\/p>\n
public class Calculator {\n\n    public static int add(int a, int b) {\n        return a + b;\n    }\n\n    public static int subtract(int a, int b) {\n        return a - b;\n    }\n\n    public static double multiply(double a, double b) {\n        return a * b;\n    }\n\n    public static double divide(double a, double b) {\n        return a \/ b;\n    }\n\n    public static void main(String[] args) {\n        int sum = add(10, 5);\n        int difference = subtract(10, 5);\n        double product = multiply(10.5, 5.5);\n        double quotient = divide(10.5, 5.5);\n\n        System.out.println(\"Sum: \" + sum);\n        System.out.println(\"Difference: \" + difference);\n        System.out.println(\"Product: \" + product);\n        System.out.println(\"Quotient: \" + quotient);\n    }\n}<\/pre>\n
\u5728\u8fd9\u4e2a\u6848\u4f8b\u4e2d\uff0cCalculator<\/code> \u7c7b\u5305\u542b\u51e0\u4e2a\u6267\u884c\u52a0\u3001\u51cf\u3001\u4e58\u548c\u9664\u64cd\u4f5c\u7684\u51fd\u6570\u3002\u901a\u8fc7\u5c06\u8fd9\u4e9b\u64cd\u4f5c\u5c01\u88c5\u5728\u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\uff0c\u5e76\u4e14\u53ef\u4ee5\u8f7b\u677e\u5730\u91cd\u7528\u8fd9\u4e9b\u51fd\u6570\u6765\u6267\u884c\u4e0d\u540c\u7684\u8ba1\u7b97\u3002<\/p>\n
\u7ed3\u8bba<\/strong><\/p>\n
Java \u51fd\u6570\u662f\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\u3001\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u91cd\u7528\u6027\u7684\u5f3a\u5927\u5de5\u5177\u3002\u901a\u8fc7\u4e86\u89e3\u51fd\u6570\u7684\u58f0\u660e\u3001\u8c03\u7528\u3001\u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26\u3001\u53c2\u6570\u548c\u8fd4\u56de\u503c\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u4f7f\u7528\u5b83\u4eec\u6765\u7f16\u5199\u6e05\u6670\u4e14\u6613\u4e8e\u7ef4\u62a4\u7684\u4ee3\u7801\u3002<\/p>\n
\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300aJava\u51fd\u6570\u7684\u53ef\u7528\u6027\u5982\u4f55\uff1f\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
Java\u51fd\u6570\u7684\u53ef\u7528\u6027\u5982\u4f55\uff1f \u5c0f\u4f19...<\/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-202533","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202533","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=202533"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202533\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202533"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202533"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202533"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}