{"id":202992,"date":"2025-05-22T09:38:03","date_gmt":"2025-05-22T01:38:03","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202992\/"},"modified":"2025-05-22T09:38:03","modified_gmt":"2025-05-22T01:38:03","slug":"varargs-%e5%8f%82%e6%95%b0%e5%9c%a8-java-%e5%87%bd%e6%95%b0%e9%87%8d%e8%bd%bd%e4%b8%ad%e7%9a%84%e4%bc%98%e5%8a%bf%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202992\/","title":{"rendered":"Varargs \u53c2\u6570\u5728 Java \u51fd\u6570\u91cd\u8f7d\u4e2d\u7684\u4f18\u52bf\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"

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

Varargs \u53c2\u6570\u5728 Java \u51fd\u6570\u91cd\u8f7d\u4e2d\u7684\u4f18\u52bf\u662f\u4ec0\u4e48\uff1f<\/h1>\n

\u5404\u4f4d\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\u5440\uff01\u770b\u770b\u4eca\u5929\u6211\u53c8\u7ed9\u5404\u4f4d\u5e26\u6765\u4e86\u4ec0\u4e48\u6587\u7ae0\uff1f\u672c\u6587\u6807\u9898\u662f<\/span>\u300aVarargs \u53c2\u6570\u5728 Java \u51fd\u6570\u91cd\u8f7d\u4e2d\u7684\u4f18\u52bf\u662f\u4ec0\u4e48\uff1f\u300b<\/span>\uff0c\u5f88\u660e\u663e\u662f\u5173\u4e8e\u6587\u7ae0<\/span>\u7684\u6587\u7ae0\u54c8\u54c8\u54c8\uff0c\u5176\u4e2d\u5185\u5bb9\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u80fd\u5e2e\u5230\u4f60\uff0c\u89c9\u5f97\u5f88\u4e0d\u9519\u7684\u8bdd\uff0c\u6b22\u8fce\u5404\u4f4d\u591a\u591a\u70b9\u8bc4\u548c\u5206\u4eab\uff01<\/span><\/p>\n

Varargs \u53c2\u6570\u5728\u51fd\u6570\u91cd\u8f7d\u4e2d\u53d1\u6325\u7740\u91cd\u8981\u4f5c\u7528\uff0c\u5b83\u5141\u8bb8\u65b9\u6cd5\u63a5\u53d7\u53ef\u53d8\u6570\u91cf\u7684\u53c2\u6570\uff0c\u4ece\u800c\u63d0\u4f9b\u4e86\u7075\u6d3b\u6027\u3002\u901a\u8fc7\u4f7f\u7528 … \u8bed\u6cd5\uff0c\u53ef\u4ee5\u5b9a\u4e49 varargs \u53c2\u6570\uff0c\u5e76\u4e3a\u63a5\u53d7\u4e0d\u540c\u6570\u91cf\u53c2\u6570\u7684\u60c5\u51b5\u521b\u5efa\u4e0d\u540c\u7684\u5b9e\u73b0\u3002Varargs \u53c2\u6570\u8fd8\u53ef\u4ee5\u51cf\u5c11\u4ee3\u7801\u5197\u4f59\uff0c\u7528\u4e00\u4e2a\u65b9\u6cd5\u66ff\u4ee3\u591a\u4e2a\u65b9\u6cd5\uff0c\u4f8b\u5982 sum \u65b9\u6cd5\u3002\u5b83\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5b9e\u7528\u7a0b\u5e8f\u7c7b\u4e2d\uff0c\u4f8b\u5982\u6587\u672c\u683c\u5f0f\u5316\u5b9e\u7528\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u7075\u6d3b\u5730\u5bf9\u5b57\u7b26\u4e32\u5e94\u7528\u683c\u5f0f\u5316\u9009\u9879\u3002<\/p>\n

<\/p>\n

Varargs \u53c2\u6570\u5728 Java \u51fd\u6570\u91cd\u8f7d\u4e2d\u7684\u4f18\u52bf<\/strong><\/p>\n

Varargs \u53c2\u6570\uff08\u53ef\u53d8\u53c2\u6570\uff09\u5141\u8bb8\u65b9\u6cd5\u63a5\u53d7\u53ef\u53d8\u6570\u91cf\u7684\u53c2\u6570\u3002\u5b83\u4e3a\u65b9\u6cd5\u91cd\u8f7d\u63d0\u4f9b\u4e86\u663e\u7740\u7684\u7075\u6d3b\u6027\uff0c\u4f7f\u5f00\u53d1\u4eba\u5458\u80fd\u591f\u7f16\u5199\u66f4\u901a\u7528\u548c\u7b80\u6d01\u7684\u4ee3\u7801\u3002<\/p>\n

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

\u5728 Java \u4e2d\uff0c\u4f7f\u7528 ...<\/code>\uff08\u7701\u7565\u53f7\uff09\u8bed\u6cd5\u5b9a\u4e49 varargs \u53c2\u6570\uff1a<\/p>\n

public static void method(T... args) {\n    \/\/ ...\n}<\/pre>\n
T<\/code> \u6307\u5b9a\u53c2\u6570\u7684\u7c7b\u578b\u3002<\/p>\n
\u51fd\u6570\u91cd\u8f7d<\/strong><\/p>\n
Varargs \u53c2\u6570\u5728\u91cd\u8f7d\u65b9\u6cd5\u65f6\u975e\u5e38\u6709\u7528\u3002\u5b83\u5141\u8bb8\u4e3a\u63a5\u53d7\u4e0d\u540c\u6570\u91cf\u53c2\u6570\u7684\u60c5\u51b5\u521b\u5efa\u4e0d\u540c\u7684\u5b9e\u73b0\u3002\u4f8b\u5982\uff1a<\/p>\n
public static void printArray(int[] arr) {\n    for (int num : arr) {\n        System.out.print(num + \" \");\n    }\n    System.out.println();\n}\n\npublic static void printArray(String... elements) {\n    for (String element : elements) {\n        System.out.print(element + \" \");\n    }\n    System.out.println();\n}<\/pre>\n
\u5728\u7b2c\u4e00\u4e2a\u65b9\u6cd5\u4e2d\uff0cprintArray<\/code> \u63a5\u6536\u4e00\u4e2a int \u6570\u7ec4\uff0c\u800c\u5728\u7b2c\u4e8c\u4e2a\u65b9\u6cd5\u4e2d\uff0c\u5b83\u63a5\u6536\u53ef\u53d8\u6570\u91cf\u7684\u5b57\u7b26\u4e32\u3002\u8fd9\u5141\u8bb8\u6211\u4eec\u4f7f\u7528\u4e0d\u540c\u7684\u8bed\u6cd5\u8c03\u7528\u76f8\u540c\u7684\u65b9\u6cd5\uff1a<\/p>\n
int[] numbers = {1, 2, 3};\nprintArray(numbers); \/\/ \u8f93\u51fa\uff1a1 2 3\n\nString[] names = {\"Alice\", \"Bob\", \"Carol\"};\nprintArray(names); \/\/ \u8f93\u51fa\uff1aAlice Bob Carol<\/pre>\n
\u51cf\u5c11\u4ee3\u7801\u5197\u4f59<\/strong><\/p>\n
Varargs \u53c2\u6570\u53ef\u4ee5\u5e2e\u52a9\u51cf\u5c11\u4ee3\u7801\u5197\u4f59\u3002\u4f8b\u5982\uff0c\u8003\u8651\u4ee5\u4e0b\u4ee3\u7801\u6bb5\uff1a<\/p>\n
public static int sum(int a, int b) {\n    return a + b;\n}\n\npublic static int sum(int a, int b, int c) {\n    return a + b + c;\n}\n\n\/\/ ...<\/pre>\n
\u4f7f\u7528 varargs \u53c2\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u4e00\u4e2a\u65b9\u6cd5\u66ff\u6362\u8fd9\u4e24\u4e2a\u65b9\u6cd5\uff1a<\/p>\n
public static int sum(int... numbers) {\n    int total = 0;\n    for (int num : numbers) {\n        total += num;\n    }\n    return total;\n}\n\n\/\/ ...<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u8003\u8651\u4e00\u4e2a\u6587\u672c\u683c\u5f0f\u5316\u5b9e\u7528\u7a0b\u5e8f\u7c7b\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 varargs \u53c2\u6570\u521b\u5efa format<\/code> \u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u5e76\u652f\u6301\u4e0d\u540c\u7684\u683c\u5f0f\u5316\u9009\u9879\uff1a<\/p>\n
public class TextFormat {\n\n    public static String format(String message, Object... args) {\n        \/\/ \u83b7\u53d6\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u548c\u53c2\u6570\n        String formattedMessage = String.format(message, args);\n\n        \/\/ \u5e94\u7528\u5176\u4ed6\u683c\u5f0f\u5316\u9009\u9879\uff08\u5982\u679c\u6709\u7684\u8bdd\uff09\n        \/\/ ...\n\n        return formattedMessage;\n    }\n}<\/pre>\n
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 format<\/code> \u65b9\u6cd5\u5bf9\u5b57\u7b26\u4e32\u5e94\u7528\u4e0d\u540c\u7ea7\u522b\u7684\u683c\u5f0f\u5316\uff1a<\/p>\n
\/\/ \u8f93\u51fa\uff1a\"John has 10 apples.\"\nString formattedMessage = TextFormat.format(\"John has %d apples.\", 10);\n\n\/\/ \u8f93\u51fa\uff1a\"John bought apples, oranges, and bananas.\"\nString formattedMessage = TextFormat.format(\"John bought %s.\", \"apples\", \"oranges\", \"bananas\");<\/pre>\n
\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300aVarargs \u53c2\u6570\u5728 Java \u51fd\u6570\u91cd\u8f7d\u4e2d\u7684\u4f18\u52bf\u662f\u4ec0\u4e48\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":"
Varargs \u53c2\u6570\u5728 Java...<\/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-202992","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202992","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=202992"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202992\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202992"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202992"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202992"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}