{"id":202901,"date":"2025-05-22T08:13:31","date_gmt":"2025-05-22T00:13:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202901\/"},"modified":"2025-05-22T08:13:31","modified_gmt":"2025-05-22T00:13:31","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8lambda%e8%a1%a8%e8%be%be%e5%bc%8f%e5%9c%a8java%e4%b8%ad%e5%88%9b%e5%bb%ba%e5%8c%bf%e5%90%8d%e7%b1%bb%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202901\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u5728Java\u4e2d\u521b\u5efa\u533f\u540d\u7c7b\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5982\u4f55\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u5728Java\u4e2d\u521b\u5efa\u533f\u540d\u7c7b\uff1f<\/h1>\n<p>\u6765\u5230\u7684\u5927\u5bb6\uff0c\u76f8\u4fe1\u90fd\u662f\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5e0c\u671b\u5728\u8fd9\u91cc\u5b66\u4e60\u6587\u7ae0\u76f8\u5173\u7f16\u7a0b\u77e5\u8bc6\u3002\u4e0b\u9762\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u5e26\u5927\u5bb6\u804a\u804a\u300a\u5982\u4f55\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u5728Java\u4e2d\u521b\u5efa\u533f\u540d\u7c7b\uff1f\u300b\uff0c\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1729992341671d9695829a6.jpg\" class=\"aligncenter\"><\/p>\n<h2>\u5982\u4f55\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u5728Java\u4e2d\u521b\u5efa\u533f\u540d\u7c7b<\/h2>\n<p>Java 8\u5f15\u5165\u4e86Lambda\u8868\u8fbe\u5f0f\uff0c\u5b83\u662f\u4e00\u79cd\u7b80\u6d01\u3001\u4f18\u96c5\u7684\u65b9\u5f0f\u6765\u521b\u5efa\u533f\u540d\u7c7b\u3002\u533f\u540d\u7c7b\u662f\u672a\u547d\u540d\u7684\u7c7b\uff0c\u53ef\u4ee5\u5b9e\u73b0\u63a5\u53e3\u6216\u6269\u5c55\u7c7b\u3002\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u521b\u5efa\u533f\u540d\u7c7b\u6709\u51e0\u4e2a\u597d\u5904\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u4ee3\u7801\u66f4\u7b80\u6d01<\/li>\n<li>\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027<\/li>\n<li>\u51cf\u5c11\u56e0\u521b\u5efa\u548c\u7ba1\u7406\u989d\u5916\u7c7b\u800c\u4ea7\u751f\u7684\u5f00\u9500<\/li>\n<\/ul>\n<h3>\u8bed\u6cd5<\/h3>\n<p>Lambda\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>(parameters) -&gt; expression<\/pre>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0bLambda\u8868\u8fbe\u5f0f\u521b\u5efa\u4e00\u4e2a\u5b9e\u73b0<code>Runnable<\/code>\u63a5\u53e3\u7684\u533f\u540d\u7c7b\uff1a<\/p>\n<pre>() -&gt; System.out.println(\"Hello, world!\");<\/pre>\n<h3>\u521b\u5efa\u533f\u540d\u7c7b<\/h3>\n<p>\u8981\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u521b\u5efa\u533f\u540d\u7c7b\uff0c\u8bf7\u6309\u4ee5\u4e0b\u6b65\u9aa4\u64cd\u4f5c\uff1a<\/p>\n<p><strong>1. \u8bc6\u522b\u8981\u5b9e\u73b0\u7684\u63a5\u53e3\u6216\u6269\u5c55\u7684\u7c7b\u3002<\/strong><\/p>\n<p><strong>2. \u7f16\u5199\u4e00\u4e2aLambda\u8868\u8fbe\u5f0f\uff0c\u8be5\u8868\u8fbe\u5f0f\u5c06\u5b9e\u73b0\u63a5\u53e3\u7684\u65b9\u6cd5\u6216\u6269\u5c55\u7c7b\u7684\u6210\u5458\u3002<\/strong><\/p>\n<p><strong>3. \u5c06Lambda\u8868\u8fbe\u5f0f\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9<code>new<\/code>\u8fd0\u7b97\u7b26\u3002<\/strong><\/p>\n<pre>\/\/ \u521b\u5efa\u4e00\u4e2a\u5b9e\u73b0 Runnable \u63a5\u53e3\u7684\u533f\u540d\u7c7b\nRunnable task = () -&gt; System.out.println(\"Hello, world!\");\n\n\/\/ \u521b\u5efa\u4e00\u4e2a\u6269\u5c55 Thread \u7c7b\u7684\u533f\u540d\u7c7b\nThread thread = new Thread(() -&gt; System.out.println(\"Hello, world!\"));<\/pre>\n<h3>\u5b9e\u6218\u6848\u4f8b<\/h3>\n<h4>1. \u521b\u5efa\u4e00\u4e2a\u6bd4\u8f83\u5668\u7684Lambda\u8868\u8fbe\u5f0f<\/h4>\n<p>\u4ee5\u4e0bLambda\u8868\u8fbe\u5f0f\u521b\u5efa\u4e00\u4e2a\u6bd4\u8f83\u5668\uff0c\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u6574\u6570\uff1a<\/p>\n<pre>Comparator&lt;Integer&gt; comparator = (a, b) -&gt; a - b;<\/pre>\n<h4>2. \u521b\u5efa\u4e00\u4e2a\u8fc7\u6ee4\u5668\u5668\u4ef6\u7684Lambda\u8868\u8fbe\u5f0f<\/h4>\n<p>\u4ee5\u4e0bLambda\u8868\u8fbe\u5f0f\u521b\u5efa\u4e00\u4e2a\u8fc7\u6ee4\u5668\uff0c\u7528\u4e8e\u8fc7\u6ee4\u5217\u8868\u4e2d\u7684\u5947\u6570\uff1a<\/p>\n<pre>List&lt;Integer&gt; numbers = Arrays.asList(1, 2, 3, 4, 5);\nList&lt;Integer&gt; filteredNumbers = numbers\n    .stream()\n    .filter(x -&gt; x % 2 != 0)\n    .collect(Collectors.toList());<\/pre>\n<h3>\u7ed3\u8bba<\/h3>\n<p>\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u521b\u5efa\u533f\u540d\u7c7b\u662f\u4e00\u79cd\u5f3a\u5927\u4e14\u4fbf\u6377\u7684\u65b9\u6cd5\uff0c\u53ef\u7b80\u5316\u4ee3\u7801\uff0c\u63d0\u9ad8\u53ef\u8bfb\u6027\uff0c\u5e76\u51cf\u5c11\u5f00\u9500\u3002\u901a\u8fc7\u7406\u89e3Lambda\u8868\u8fbe\u5f0f\u7684\u8bed\u6cd5\u548c\u5982\u4f55\u4f7f\u7528\u5b83\u4eec\u6765\u521b\u5efa\u533f\u540d\u7c7b\uff0cJava\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u5145\u5206\u5229\u7528Java 8\u63d0\u4f9b\u7684\u8fd9\u4e2a\u529f\u80fd\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u300a\u5982\u4f55\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u5728Java\u4e2d\u521b\u5efa\u533f\u540d\u7c7b\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u533f\u540d\u7c7b\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u5728Ja&#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-202901","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202901","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=202901"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202901\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202901"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202901"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202901"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}