{"id":202645,"date":"2025-05-22T08:26:01","date_gmt":"2025-05-22T00:26:01","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202645\/"},"modified":"2025-05-22T08:26:01","modified_gmt":"2025-05-22T00:26:01","slug":"varargs-%e5%8f%82%e6%95%b0%e5%9c%a8-java-%e5%a4%9a%e7%ba%bf%e7%a8%8b%e7%8e%af%e5%a2%83%e4%b8%ad%e7%9a%84%e4%bd%bf%e7%94%a8%e6%9c%89%e4%bd%95%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202645\/","title":{"rendered":"varargs \u53c2\u6570\u5728 Java \u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u7684\u4f7f\u7528\u6709\u4f55\u6ce8\u610f\u4e8b\u9879\uff1f"},"content":{"rendered":"

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

varargs \u53c2\u6570\u5728 Java \u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u7684\u4f7f\u7528\u6709\u4f55\u6ce8\u610f\u4e8b\u9879\uff1f<\/h1>\n

\u6b22\u8fce\u5404\u4f4d\u5c0f\u4f19\u4f34\u6765\u5230\uff0c\u76f8\u805a\u4e8e\u6b64\u90fd\u662f\u7f18\u54c8\u54c8\u54c8\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u300avarargs \u53c2\u6570\u5728 Java \u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u7684\u4f7f\u7528\u6709\u4f55\u6ce8\u610f\u4e8b\u9879\uff1f\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\uff0c\u5982\u679c\u4f60\u5bf9\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u975e\u5e38\u611f\u5174\u8da3\u6216\u8005\u6b63\u5728\u81ea\u5b66\uff0c\u90fd\u53ef\u4ee5\u5173\u6ce8\u6211\uff0c\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\uff01\u5f53\u7136\uff0c\u6709\u4ec0\u4e48\u5efa\u8bae\u4e5f\u6b22\u8fce\u5728\u8bc4\u8bba\u7559\u8a00\u63d0\u51fa\uff01\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n

\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u4f7f\u7528 varargs \u53c2\u6570\u65f6\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u4e8b\u9879\uff1a\u53ef\u80fd\u5bfc\u81f4\u7ade\u6001\u6761\u4ef6\uff1bvarargs \u53c2\u6570\u4e00\u65e6\u521b\u5efa\u65e0\u6cd5\u4fee\u6539\uff1b\u5fc5\u987b\u540c\u6b65\u5bf9\u6570\u7ec4\u7684\u8bbf\u95ee\u3002<\/p>\n

<\/p>\n

varargs<\/code> \u53c2\u6570\u5728 Java \u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u7684\u6ce8\u610f\u4e8b\u9879<\/h3>\n

varargs<\/code> \u53c2\u6570\uff08\u53ef\u53d8\u957f\u53c2\u6570\uff09\u53ef\u4ee5\u8ba9\u65b9\u6cd5\u63a5\u53d7\u4efb\u610f\u6570\u91cf\u7684\u53c2\u6570\u3002\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u4f7f\u7528 varargs<\/code> \u53c2\u6570\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n

1. \u7ade\u6001\u6761\u4ef6<\/strong><\/p>\n

\u5982\u679c\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8c03\u7528\u5e26\u6709 varargs<\/code> \u53c2\u6570\u7684\u65b9\u6cd5\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7ade\u6001\u6761\u4ef6\u3002\u5f53\u7ebf\u7a0b\u4e89\u7528\u5171\u4eab\u6570\u636e\u65f6\uff0c\u5c31\u4f1a\u51fa\u73b0\u7ade\u6001\u6761\u4ef6\uff0c\u4ece\u800c\u5bfc\u81f4\u7a0b\u5e8f\u884c\u4e3a\u4e0d\u53ef\u9884\u6d4b\u3002<\/p>\n

2. \u53c2\u6570\u4e0d\u53ef\u53d8<\/strong><\/p>\n

varargs<\/code> \u53c2\u6570\u5b9e\u9645\u4e0a\u662f\u6570\u7ec4\uff0c\u4e00\u65e6\u521b\u5efa\uff0c\u5c31\u4e0d\u80fd\u66f4\u6539\u5176\u957f\u5ea6\u6216\u5185\u5bb9\u3002\u8fd9\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u53ef\u80fd\u5b58\u5728\u95ee\u9898\uff0c\u56e0\u4e3a\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u80fd\u6b63\u5728\u4fee\u6539\u6570\u7ec4\uff0c\u800c\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u80fd\u6b63\u5728\u4f7f\u7528\u8be5\u6570\u7ec4\u3002<\/p>\n

3. \u540c\u6b65<\/strong><\/p>\n

\u4e3a\u4e86\u907f\u514d\u7ade\u6001\u6761\u4ef6\u548c\u53c2\u6570\u4e0d\u53ef\u53d8\u95ee\u9898\uff0c\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u4f7f\u7528 varargs<\/code> \u53c2\u6570\u65f6\uff0c\u5fc5\u987b\u5bf9\u8bbf\u95ee\u6570\u7ec4\u8fdb\u884c\u540c\u6b65\u3002\u53ef\u4ee5\u4f7f\u7528 synchronized<\/code> \u5173\u952e\u5b57\u6216 Collections<\/code> \u7c7b\uff08\u5982 Collections.synchronizedList()<\/code>) \u6765\u8fdb\u884c\u540c\u6b65\u3002<\/p>\n

\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n

\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u4f7f\u7528 varargs<\/code> \u53c2\u6570\u7684\u793a\u4f8b\uff1a<\/p>\n

import java.util.Arrays;\n\nclass MultiThreadedArraySum {\n\n    private int[] sharedArray;\n\n    \/\/ \u4f7f\u7528 varargs \u53c2\u6570\u65b9\u6cd5\n    public int sum(int... numbers) {\n        synchronized (sharedArray) {\n            return Arrays.stream(numbers).sum();\n        }\n    }\n\n    public void run() {\n        sharedArray = new int[10];\n        Thread t1 = new Thread(() -> {\n            for (int i = 0; i < 10; i++) {\n                sharedArray[i] = i;\n            }\n        });\n        Thread t2 = new Thread(() -> {\n            int sum = sum(sharedArray);\n            System.out.println(\"Sum: \" + sum);\n        });\n        t1.start();\n        t2.start();\n        try {\n            t1.join();\n            t2.join();\n        } catch (InterruptedException e) {\n            e.printStackTrace();\n        }\n    }\n\n    public static void main(String[] args) {\n        MultiThreadedArraySum obj = new MultiThreadedArraySum();\n        obj.run();\n    }\n}<\/pre>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0csum()<\/code> \u65b9\u6cd5\u4f7f\u7528 varargs<\/code> \u53c2\u6570\u6765\u8ba1\u7b97\u6570\u7ec4\u4e2d\u6570\u5b57\u7684\u603b\u548c\u3002synchronized<\/code> \u5757\u786e\u4fdd\u7ebf\u7a0b\u5728\u8bbf\u95ee\u5171\u4eab\u6570\u7ec4 sharedArray<\/code> \u65f6\u662f\u540c\u6b65\u7684\uff0c\u4ece\u800c\u907f\u514d\u7ade\u6001\u6761\u4ef6\u3002<\/p>\n
\u672c\u7bc7\u5173\u4e8e\u300avarargs \u53c2\u6570\u5728 Java \u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u7684\u4f7f\u7528\u6709\u4f55\u6ce8\u610f\u4e8b\u9879\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\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-202645","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202645","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=202645"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202645\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202645"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202645"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202645"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}