{"id":203054,"date":"2025-05-22T12:30:21","date_gmt":"2025-05-22T04:30:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203054\/"},"modified":"2025-05-22T12:30:21","modified_gmt":"2025-05-22T04:30:21","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e4%b8%ad%e5%b9%b6%e8%a1%8c%e8%ae%a1%e7%ae%97%e7%9a%84%e4%bc%98%e5%8a%bf%e4%b8%8e%e5%b1%80%e9%99%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203054\/","title":{"rendered":"Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u5e76\u884c\u8ba1\u7b97\u7684\u4f18\u52bf\u4e0e\u5c40\u9650"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u5e76\u884c\u8ba1\u7b97\u7684\u4f18\u52bf\u4e0e\u5c40\u9650<\/h1>\n<p>\u4eb2\u7231\u7684\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5982\u679c\u4f60\u70b9\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u660e\u4f60\u5bf9\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u5e76\u884c\u8ba1\u7b97\u7684\u4f18\u52bf\u4e0e\u5c40\u9650\u300b\u5f88\u611f\u5174\u8da3\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u7ed9\u5927\u5bb6\u8be6\u7ec6\u89e3\u6790\u4e00\u4e0b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u6240\u6709\u8ba4\u771f\u8bfb\u5b8c\u7684\u7ae5\u978b\u4eec\uff0c\u90fd\u6709\u5b9e\u8d28\u6027\u7684\u63d0\u9ad8\u3002<\/p>\n<p>Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u7684\u5e76\u884c\u8ba1\u7b97\u5177\u6709\u4ee5\u4e0b\u4f18\u52bf\uff1a\u63d0\u5347\u6027\u80fd\uff1a\u901a\u8fc7\u5728\u591a\u6838\u4e0a\u540c\u65f6\u6267\u884c\u4efb\u52a1\uff0c\u63d0\u5347\u6027\u80fd\u3002\u53ef\u6269\u5c55\u6027\uff1a\u968f\u7740\u6838\u5fc3\u6570\u91cf\u589e\u52a0\uff0c\u81ea\u52a8\u5229\u7528\u989d\u5916\u8d44\u6e90\u3002\u54cd\u5e94\u80fd\u529b\uff1a\u5feb\u901f\u5904\u7406\u8f93\u5165\uff0c\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u54cd\u5e94\u901f\u5ea6\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1730030975671e2d7f11f92.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u7684\u5e76\u884c\u8ba1\u7b97<\/strong><\/p>\n<p><strong>\u4f18\u52bf\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u63d0\u5347\u6027\u80fd\uff1a<\/strong>\u5e76\u884c\u8ba1\u7b97\u53ef\u4ee5\u5c06\u4efb\u52a1\u5206\u89e3\u6210\u8f83\u5c0f\u7684\u90e8\u5206\uff0c\u5e76\u5728\u8ba1\u7b97\u673a\u7684\u591a\u4e2a\u6838\u5fc3\u4e0a\u540c\u65f6\u6267\u884c\uff0c\u4ece\u800c\u663e\u8457\u63d0\u5347\u6027\u80fd\u3002<\/li>\n<li><strong>\u53ef\u6269\u5c55\u6027\uff1a<\/strong>\u5f53\u8ba1\u7b97\u673a\u6dfb\u52a0\u66f4\u591a\u6838\u5fc3\u65f6\uff0c\u5e76\u884c\u7684\u4ee3\u7801\u53ef\u4ee5\u81ea\u52a8\u5229\u7528\u8fd9\u4e9b\u989d\u5916\u7684\u8d44\u6e90\u3002<\/li>\n<li><strong>\u54cd\u5e94\u80fd\u529b\uff1a<\/strong>\u5e76\u884c\u7684\u4ee3\u7801\u53ef\u4ee5\u901a\u8fc7\u5feb\u901f\u5904\u7406\u7528\u6237\u8f93\u5165\u548c\u5176\u4ed6\u4e8b\u4ef6\u6765\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u7684\u54cd\u5e94\u80fd\u529b\u3002<\/li>\n<\/ul>\n<p><strong>\u5c40\u9650\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u5171\u4eab\u72b6\u6001\u7684\u6311\u6218\uff1a<\/strong>\u5f53\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8bbf\u95ee\u5171\u4eab\u72b6\u6001\u65f6\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7ade\u6001\u6761\u4ef6\u3001\u6570\u636e\u635f\u574f\u548c\u5176\u4ed6\u95ee\u9898\u3002<\/li>\n<li><strong>\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\uff1a<\/strong>\u5e76\u884c\u7684\u4ee3\u7801\u6bd4\u987a\u5e8f\u4ee3\u7801\u66f4\u590d\u6742\uff0c\u4f7f\u5176\u66f4\u96be\u7406\u89e3\u548c\u7ef4\u62a4\u3002<\/li>\n<li><strong>\u786c\u4ef6\u8981\u6c42\uff1a<\/strong>\u5e76\u884c\u8ba1\u7b97\u9700\u8981\u591a\u6838\u5904\u7406\u5668\u624d\u80fd\u63d0\u4f9b\u663e\u8457\u7684\u6027\u80fd\u63d0\u5347\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n<p>\u4e3a\u4e86\u6f14\u793a Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u5e76\u884c\u8ba1\u7b97\u7684\u4f18\u52bf\uff0c\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u8ba1\u7b97\u5927\u91cf\u6570\u5b57\u4e4b\u548c\u7684\u7a0b\u5e8f\u3002<\/p>\n<pre>import java.util.stream.IntStream;\n\npublic class ParallelSum {\n\n    \/\/ \u4e32\u884c\u8ba1\u7b97\n    public static int sumSequential(int[] numbers) {\n        int sum = 0;\n        for (int number : numbers) {\n            sum += number;\n        }\n        return sum;\n    }\n\n    \/\/ \u5e76\u884c\u8ba1\u7b97\n    public static int sumParallel(int[] numbers) {\n        return IntStream.of(numbers).parallel().sum();\n    }\n\n    public static void main(String[] args) {\n        int[] numbers = new int[1000000];\n        for (int i = 0; i &lt; numbers.length; i++) {\n            numbers[i] = i;\n        }\n\n        \/\/ \u6d4b\u91cf\u4e32\u884c\u8ba1\u7b97\u7684\u65f6\u95f4\n        long startTime = System.nanoTime();\n        int sumSequential = sumSequential(numbers);\n        long endTime = System.nanoTime();\n        long durationSequential = endTime - startTime;\n\n        \/\/ \u6d4b\u91cf\u5e76\u884c\u8ba1\u7b97\u7684\u65f6\u95f4\n        startTime = System.nanoTime();\n        int sumParallel = sumParallel(numbers);\n        endTime = System.nanoTime();\n        long durationParallel = endTime - startTime;\n\n        System.out.println(\"\u4e32\u884c\u8ba1\u7b97\u8017\u65f6 (\u6beb\u79d2)\uff1a \" + durationSequential \/ 1000000);\n        System.out.println(\"\u5e76\u884c\u8ba1\u7b97\u8017\u65f6 (\u6beb\u79d2)\uff1a \" + durationParallel \/ 1000000);\n    }\n}<\/pre>\n<p>\u8fd0\u884c\u8be5\u7a0b\u5e8f\uff0c\u5c31\u4f1a\u770b\u5230\u5e76\u884c\u8ba1\u7b97\u663e\u8457\u52a0\u5feb\u4e86\u6c42\u548c\u8fc7\u7a0b\uff1a<\/p>\n<pre>\u4e32\u884c\u8ba1\u7b97\u8017\u65f6 (\u6beb\u79d2)\uff1a 152\n\u5e76\u884c\u8ba1\u7b97\u8017\u65f6 (\u6beb\u79d2)\uff1a 60<\/pre>\n<p>\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u5e76\u884c\u8ba1\u7b97\u7684\u4f18&#46;&#46;&#46;<\/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-203054","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203054","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=203054"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203054\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203054"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203054"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203054"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}