{"id":202532,"date":"2025-05-22T10:12:04","date_gmt":"2025-05-22T02:12:04","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202532\/"},"modified":"2025-05-22T10:12:04","modified_gmt":"2025-05-22T02:12:04","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e7%9a%84%e5%b9%b6%e8%a1%8c%e8%ae%a1%e7%ae%97%e4%b8%8e%e5%a4%9a%e7%ba%bf%e7%a8%8b%e6%af%94%e8%be%83","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202532\/","title":{"rendered":"Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5e76\u884c\u8ba1\u7b97\u4e0e\u591a\u7ebf\u7a0b\u6bd4\u8f83"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5e76\u884c\u8ba1\u7b97\u4e0e\u591a\u7ebf\u7a0b\u6bd4\u8f83<\/h1>\n<p>\u4f60\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5e76\u884c\u8ba1\u7b97\u4e0e\u591a\u7ebf\u7a0b\u6bd4\u8f83\u300b<\/span>\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01<\/p>\n<p>\u5728 Java \u4e2d\uff0c\u51fd\u6570\u5f0f\u7f16\u7a0b\u901a\u8fc7\u5e76\u53d1\u6d41\u5b9e\u73b0\u5e76\u884c\u8ba1\u7b97\uff0c\u800c\u591a\u7ebf\u7a0b\u5219\u901a\u8fc7\u663e\u5f0f\u7ebf\u7a0b\u521b\u5efa\u5b9e\u73b0\u3002 \u5e76\u884c\u8ba1\u7b97\u7528\u4e8e\u64cd\u4f5c\u5927\u6570\u636e\u96c6\uff0c\u5177\u6709\u9ad8\u5e76\u53d1\u6027\u548c\u81ea\u52a8\u540c\u6b65\uff0c\u6027\u80fd\u8f83\u9ad8\uff0c\u9002\u7528\u4e8e\u4efb\u52a1\u7279\u5b9a\u7684\u5e76\u884c\u8ba1\u7b97\u3002 \u591a\u7ebf\u7a0b\u7528\u4e8e\u7ba1\u7406\u5355\u4e2a\u4efb\u52a1\uff0c\u5e76\u53d1\u6027\u4f4e\uff0c\u9700\u8981\u624b\u52a8\u540c\u6b65\uff0c\u6027\u80fd\u4f9d\u8d56\u4e8e\u5177\u4f53\u4efb\u52a1\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729915425671c6a219ceef.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5e76\u884c\u8ba1\u7b97\u4e0e\u591a\u7ebf\u7a0b\u6bd4\u8f83<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u901a\u8fc7\u4f7f\u7528\u4e0d\u53ef\u53d8\u6570\u636e\u548c\u7eaf\u7cb9\u51fd\u6570\u6765\u5f3a\u8c03\u4ee3\u7801\u7684\u7b80\u6d01\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002Java 8 \u5f15\u5165\u4e86 Lambda \u8868\u8fbe\u5f0f\u548c\u6d41 API\uff0c\u4f7f\u51fd\u6570\u5f0f\u7f16\u7a0b\u6210\u4e3a\u73b0\u5b9e\u3002<\/p>\n<p><strong>\u5e76\u884c\u8ba1\u7b97<\/strong><\/p>\n<p>Java \u4e3a\u5e76\u884c\u8ba1\u7b97\u63d0\u4f9b\u4e86\u4ee5\u4e0b\u5de5\u5177\uff1a<\/p>\n<ul>\n<li><strong>\u5e76\u884c\u6d41\uff08ParallelStream\uff09:<\/strong> \u7528\u4e8e\u6279\u91cf\u5904\u7406\u5927\u6570\u636e\u96c6\u3002<\/li>\n<li><strong>Fork\/Join \u6846\u67b6:<\/strong> \u7528\u4e8e\u5e76\u884c\u8ba1\u7b97\u5206\u89e3\u7684\u4efb\u52a1\u3002<\/li>\n<li><strong>\u5e76\u53d1\u5e93:<\/strong> \u7528\u4e8e\u521b\u5efa\u548c\u7ba1\u7406\u7ebf\u7a0b\u3002<\/li>\n<\/ul>\n<p><strong>\u591a\u7ebf\u7a0b<\/strong><\/p>\n<p>\u591a\u7ebf\u7a0b\u5141\u8bb8\u4e00\u4e2a\u7a0b\u5e8f\u5e76\u53d1\u6267\u884c\u591a\u4e2a\u4efb\u52a1\u3002\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7c7b\u5b9e\u73b0\u591a\u7ebf\u7a0b\uff1a<\/p>\n<ul>\n<li><strong>Thread:<\/strong> \u8868\u793a\u4e00\u4e2a\u7ebf\u7a0b\u3002<\/li>\n<li><strong>Runnable:<\/strong> \u5b9a\u4e49\u8981\u7531\u7ebf\u7a0b\u6267\u884c\u7684\u4ee3\u7801\u3002<\/li>\n<\/ul>\n<p><strong>\u6bd4\u8f83<\/strong><\/p>\n<p>\u5e76\u884c\u8ba1\u7b97\u548c\u591a\u7ebf\u7a0b\u5728\u67d0\u4e9b\u65b9\u9762\u5b58\u5728\u76f8\u4f3c\u4e4b\u5904\uff0c\u4f46\u4e5f\u6709\u660e\u663e\u7684\u533a\u522b\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u7279\u5f81<\/th>\n<th>\u5e76\u884c\u8ba1\u7b97<\/th>\n<th>\u591a\u7ebf\u7a0b<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u64cd\u4f5c<\/td>\n<td>\u64cd\u4f5c\u5927\u6570\u636e\u96c6<\/td>\n<td>\u7ba1\u7406\u5355\u4e2a\u4efb\u52a1<\/td>\n<\/tr>\n<tr>\n<td>\u5e76\u53d1\u6027<\/td>\n<td>\u9ad8\u5ea6\u5e76\u53d1<\/td>\n<td>\u4f4e\u5ea6\u5e76\u53d1<\/td>\n<\/tr>\n<tr>\n<td>\u521b\u5efa<\/td>\n<td>\u5bb9\u6613\u521b\u5efa<\/td>\n<td>\u9700\u8981\u663e\u5f0f\u7ebf\u7a0b\u521b\u5efa<\/td>\n<\/tr>\n<tr>\n<td>\u540c\u6b65<\/td>\n<td>\u81ea\u52a8\u540c\u6b65<\/td>\n<td>\u9700\u8981\u624b\u52a8\u540c\u6b65<\/td>\n<\/tr>\n<tr>\n<td>\u6027\u80fd<\/td>\n<td>\u4e00\u822c\u6027\u80fd\u8f83\u9ad8<\/td>\n<td>\u4efb\u52a1\u7279\u5b9a\u6027\u80fd\u8f83\u9ad8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5305\u542b 100 \u4e07\u4e2a\u5143\u7d20\u7684\u5927\u5217\u8868\uff0c\u6211\u4eec\u9700\u8981\u8ba1\u7b97\u6bcf\u4e2a\u5143\u7d20\u7684\u5e73\u65b9\u3002<\/p>\n<p><strong>\u5e76\u884c\u8ba1\u7b97\uff1a<\/strong><\/p>\n<pre>List&lt;Integer&gt; numbers = new ArrayList&lt;&gt;();\nfor (int i = 0; i &lt; 1000000; i++) {\n    numbers.add(i);\n}\n\nlong startTime = System.currentTimeMillis();\nList&lt;Integer&gt; squares = numbers.parallelStream()\n    .map(n -&gt; n * n)\n    .collect(Collectors.toList());\nlong endTime = System.currentTimeMillis();\nSystem.out.println(\"Parallel processing took: \" + (endTime - startTime) + \" ms\");<\/pre>\n<p><strong>\u591a\u7ebf\u7a0b\uff1a<\/strong><\/p>\n<pre>List&lt;Integer&gt; numbers = new ArrayList&lt;&gt;();\nfor (int i = 0; i &lt; 1000000; i++) {\n    numbers.add(i);\n}\n\nlong startTime = System.currentTimeMillis();\nList&lt;Integer&gt; squares = new ArrayList&lt;&gt;();\nint numThreads = 4;\nThread[] threads = new Thread[numThreads];\nfor (int i = 0; i &lt; numThreads; i++) {\n    threads[i] = new Thread(() -&gt; {\n        List&lt;Integer&gt; partialSquares = new ArrayList&lt;&gt;();\n        for (int j = i; j &lt; numbers.size(); j += numThreads) {\n            partialSquares.add(numbers.get(j) * numbers.get(j));\n        }\n        synchronized (squares) {\n            squares.addAll(partialSquares);\n        }\n    });\n}\nfor (Thread thread : threads) {\n    thread.start();\n}\nfor (Thread thread : threads) {\n    thread.join();\n}\nlong endTime = System.currentTimeMillis();\nSystem.out.println(\"Multi-threaded processing took: \" + (endTime - startTime) + \" ms\");<\/pre>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5e76\u884c\u5904\u7406\u6bd4\u591a\u7ebf\u7a0b\u5904\u7406\u8981\u5feb\u5f97\u591a\uff0c\u56e0\u4e3a\u6d41 API \u80fd\u591f\u9ad8\u6548\u5730\u5e76\u884c\u5904\u7406\u5927\u6570\u636e\u96c6\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5e76\u884c\u8ba1\u7b97\u4e0e\u591a\u7ebf\u7a0b\u6bd4\u8f83\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6587\u7ae0\u77e5\u8bc6\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5e76\u884c\u8ba1\u7b97\u4e0e\u591a&#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-202532","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202532","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=202532"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202532\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202532"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202532"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202532"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}