{"id":46828,"date":"2024-12-02T10:54:34","date_gmt":"2024-12-02T02:54:34","guid":{"rendered":"https:\/\/fwq.ai\/blog\/46828\/"},"modified":"2024-12-02T10:54:34","modified_gmt":"2024-12-02T02:54:34","slug":"%e5%9c%a8-java-%e4%b8%ad%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e6%9d%a5%e5%ae%9e%e7%8e%b0%e5%b9%b6%e8%a1%8c%e5%a4%84%e7%90%86%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/46828\/","title":{"rendered":"\u5728 Java \u4e2d\u5982\u4f55\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u6765\u5b9e\u73b0\u5e76\u884c\u5904\u7406\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5728 Java \u4e2d\u5982\u4f55\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u6765\u5b9e\u73b0\u5e76\u884c\u5904\u7406\uff1f<\/h1>\n<p><span style=\"color: #222222;, sans-serif;background-color: #FFFFFF\">\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<span style=\"color: #222222;, sans-serif;background-color: #FFFFFF\">\u662f<\/span><span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u5728 Java \u4e2d\u5982\u4f55\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u6765\u5b9e\u73b0\u5e76\u884c\u5904\u7406\uff1f\u300b<\/span>\uff0c\u5f88\u660e\u663e\u662f\u5173\u4e8e<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u7684\u6587\u7ae0\u54c8\u54c8\u54c8\uff0c\u5176\u4e2d\u5185\u5bb9\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/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<p>Java \u4e2d\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u901a\u8fc7\u9ad8\u9636\u51fd\u6570\u3001\u4e0d\u53ef\u53d8\u6570\u636e\u548c\u60f0\u6027\u6c42\u503c\u7b80\u5316\u4e86\u5e76\u884c\u7f16\u7a0b\u3002\u5e38\u89c1\u7684\u5e76\u884c\u5904\u7406\u65b9\u6cd5\u5305\u62ec\uff1aFork\/Join \u6846\u67b6\uff0c\u652f\u6301\u5bf9\u4efb\u52a1\u8fdb\u884c\u5206\u53c9\u548c\u8054\u5408\u3002Streams API\uff0c\u63d0\u4f9b\u4e86\u4e00\u79cd\u58f0\u660e\u5f0f\u7684\u65b9\u5f0f\u6765\u5904\u7406\u6570\u636e\uff0c\u5e76\u652f\u6301\u4f7f\u7528 .parallel() \u8fdb\u884c\u5e76\u884c\u5904\u7406\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729929821671ca25d882e2.jpg\" class=\"aligncenter\" title=\"\u5728 Java \u4e2d\u5982\u4f55\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u6765\u5b9e\u73b0\u5e76\u884c\u5904\u7406\uff1f\u63d2\u56fe\" alt=\"\u5728 Java \u4e2d\u5982\u4f55\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u6765\u5b9e\u73b0\u5e76\u884c\u5904\u7406\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5728 Java \u4e2d\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u5b9e\u73b0\u5e76\u884c\u5904\u7406<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u901a\u8fc7\u4f7f\u7528\u9ad8\u9636\u51fd\u6570\u3001\u4e0d\u53ef\u53d8\u6570\u636e\u548c\u60f0\u6027\u6c42\u503c\u6765\u7b80\u5316\u5e76\u884c\u7f16\u7a0b\u3002<\/p>\n<p><strong>\u4f7f\u7528 Fork\/Join \u6846\u67b6<\/strong><\/p>\n<p>Java \u4e2d\u5b9e\u73b0\u5e76\u884c\u5904\u7406\u7684\u5e38\u89c1\u65b9\u6cd5\u662f\u4f7f\u7528 Fork\/Join \u6846\u67b6\u3002\u8be5\u6846\u67b6\u63d0\u4f9b\u4e86\u5bf9\u5e76\u884c\u4efb\u52a1\u8fdb\u884c\u5206\u53c9\u548c\u8054\u5408\u7684\u5185\u7f6e\u652f\u6301\u3002<\/p>\n<pre>import java.util.concurrent.ForkJoinPool;\nimport java.util.concurrent.RecursiveTask;\n\npublic class ParallelSum extends RecursiveTask&lt;Long&gt; {\n\n    private long[] numbers;\n    private int start;\n    private int end;\n\n    public ParallelSum(long[] numbers, int start, int end) {\n        this.numbers = numbers;\n        this.start = start;\n        this.end = end;\n    }\n\n    @Override\n    protected Long compute() {\n        if (end - start &lt;= 10000) {\n            return calculateSum();\n        } else {\n            int mid = (start + end) \/ 2;\n            ParallelSum leftTask = new ParallelSum(numbers, start, mid);\n            ParallelSum rightTask = new ParallelSum(numbers, mid, end);\n            leftTask.fork();\n            rightTask.fork();\n            return leftTask.join() + rightTask.join();\n        }\n    }\n\n    private Long calculateSum() {\n        long sum = 0;\n        for (int i = start; i &lt; end; i++) {\n            sum += numbers[i];\n        }\n        return sum;\n    }\n\n    public static void main(String[] args) {\n        long[] numbers = new long[10000000];\n        for (int i = 0; i &lt; numbers.length; i++) {\n            numbers[i] = i;\n        }\n\n        ForkJoinPool pool = new ForkJoinPool();\n        ParallelSum task = new ParallelSum(numbers, 0, numbers.length);\n        long sum = pool.invoke(task);\n\n        System.out.println(\"Sum: \" + sum);\n    }\n}<\/pre>\n<p><strong>\u4f7f\u7528 Streams<\/strong><\/p>\n<p>Streams API \u63d0\u4f9b\u4e86\u4e00\u79cd\u529f\u80fd\u6027\u3001\u58f0\u660e\u5f0f\u7684\u65b9\u6cd5\u6765\u5904\u7406\u6570\u636e\u3002\u5b83\u652f\u6301\u5e76\u884c\u5904\u7406\uff0c\u53ea\u9700\u4f7f\u7528 <code>.parallel()<\/code> \u65b9\u6cd5\u3002<\/p>\n<pre>import java.util.stream.LongStream;\n\npublic class ParallelStreamSum {\n\n    public static void main(String[] args) {\n        long[] numbers = new long[10000000];\n        for (int i = 0; i &lt; numbers.length; i++) {\n            numbers[i] = i;\n        }\n\n        long sum = LongStream.of(numbers).parallel().sum();\n\n        System.out.println(\"Sum: \" + sum);\n    }\n}<\/pre>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u548c Fork\/Join \u6846\u67b6\u6216 Streams \u7684\u7ed3\u5408\u5927\u5927\u7b80\u5316\u4e86 Java \u4e2d\u7684\u5e76\u884c\u5904\u7406\u3002\u8fd9\u4f7f\u5f97\u5f00\u53d1\u4eba\u5458\u80fd\u591f\u8f7b\u677e\u7f16\u5199\u9ad8\u6548\u3001\u53ef\u6269\u5c55\u7684\u5e76\u884c\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u5728 Java \u4e2d\u5982\u4f55\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u6765\u5b9e\u73b0\u5e76\u884c\u5904\u7406\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u7c73\u4e91\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Java \u4e2d\u5982\u4f55\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u6765\u5b9e\u73b0\u5e76\u884c\u5904\u7406\uff1f \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\u300a\u5728 Java \u4e2d\u5982\u4f55\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u6765\u5b9e\u73b0\u5e76\u884c\u5904\u7406\uff1f\u300b\uff0c\u5f88\u660e\u663e\u662f\u5173\u4e8e\u6587\u7ae0\u7684\u6587\u7ae0\u54c8\u54c8\u54c8\uff0c\u5176\u4e2d\u5185\u5bb9\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230\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 Java \u4e2d\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u901a\u8fc7\u9ad8\u9636\u51fd\u6570\u3001\u4e0d\u53ef\u53d8\u6570\u636e\u548c\u60f0\u6027\u6c42\u503c\u7b80\u5316\u4e86\u5e76\u884c\u7f16\u7a0b\u3002\u5e38\u89c1\u7684\u5e76\u884c\u5904\u7406\u65b9\u6cd5\u5305\u62ec\uff1aFork\/Join \u6846\u67b6\uff0c\u652f\u6301\u5bf9\u4efb\u52a1\u8fdb\u884c\u5206\u53c9\u548c\u8054\u5408\u3002Streams API\uff0c\u63d0\u4f9b\u4e86\u4e00\u79cd\u58f0\u660e\u5f0f\u7684\u65b9\u5f0f\u6765\u5904\u7406\u6570\u636e\uff0c\u5e76\u652f\u6301\u4f7f\u7528 .parallel() \u8fdb\u884c\u5e76\u884c\u5904\u7406\u3002 \u5728 Java \u4e2d\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u5b9e\u73b0\u5e76\u884c\u5904\u7406 \u51fd\u6570\u5f0f\u7f16\u7a0b\u901a\u8fc7\u4f7f\u7528\u9ad8\u9636\u51fd\u6570\u3001\u4e0d\u53ef\u53d8\u6570\u636e\u548c\u60f0\u6027\u6c42\u503c\u6765\u7b80\u5316\u5e76\u884c\u7f16\u7a0b\u3002 \u4f7f\u7528 Fork\/Join \u6846\u67b6 Java \u4e2d\u5b9e\u73b0\u5e76\u884c\u5904\u7406\u7684\u5e38\u89c1\u65b9\u6cd5\u662f\u4f7f\u7528 Fork\/Join \u6846\u67b6\u3002\u8be5\u6846\u67b6\u63d0\u4f9b\u4e86\u5bf9\u5e76\u884c\u4efb\u52a1\u8fdb\u884c\u5206\u53c9\u548c\u8054\u5408\u7684\u5185\u7f6e\u652f\u6301\u3002 import java.util.concurrent.ForkJoinPool; import java.util.concurrent.RecursiveTask; public class ParallelSum extends RecursiveTask&lt;Long&gt; { private long[] numbers; private int start; private int end; public ParallelSum(long[] numbers, int start, int end) { this.numbers = numbers; this.start = [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-46828","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/46828","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=46828"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/46828\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=46828"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=46828"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=46828"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}