{"id":203044,"date":"2025-05-22T08:09:09","date_gmt":"2025-05-22T00:09:09","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203044\/"},"modified":"2025-05-22T08:09:09","modified_gmt":"2025-05-22T00:09:09","slug":"java-%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e4%b8%ad%e7%9a%84%e9%ab%98%e9%98%b6%e5%87%bd%e6%95%b0%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203044\/","title":{"rendered":"Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u7684\u9ad8\u9636\u51fd\u6570\u5982\u4f55\u5b9e\u73b0\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u7684\u9ad8\u9636\u51fd\u6570\u5982\u4f55\u5b9e\u73b0\uff1f<\/h1>\n<p>\u5bf9\u4e8e\u4e00\u4e2a\u6587\u7ae0\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u7262\u56fa\u624e\u5b9e\u7684\u57fa\u7840\u662f\u5341\u5206\u91cd\u8981\u7684\uff0c\u5c31\u6765\u5e26\u5927\u5bb6\u4e00\u70b9\u70b9\u7684\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u70b9\u3002\u4eca\u5929\u672c\u7bc7\u6587\u7ae0\u5e26\u5927\u5bb6\u4e86\u89e3\u300aJava \u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u7684\u9ad8\u9636\u51fd\u6570\u5982\u4f55\u5b9e\u73b0\uff1f\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e86\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u5feb\u70b9\u6536\u85cf\u8d77\u6765\u5427\uff0c\u5426\u5219\u9700\u8981\u65f6\u5c31\u627e\u4e0d\u5230\u4e86\uff01<\/p>\n<p>Java \u4e2d\u7684\u9ad8\u9636\u51fd\u6570\u53ef\u4ee5\u4f5c\u4e3a\u53c2\u6570\u6216\u8fd4\u56de\u51fd\u6570\uff0c\u53ef\u901a\u8fc7\u51fd\u6570\u5f0f\u63a5\u53e3\u6216\u533f\u540d\u5185\u90e8\u7c7b\u5b9e\u73b0\u3002\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u53ea\u9700\u58f0\u660e\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\u5373\u53ef\uff0c\u4f8b\u5982 Predicate\u3001Function\u3001Consumer\uff1b\u800c\u533f\u540d\u5185\u90e8\u7c7b\u65e0\u9700\u663e\u5f0f\u5b9a\u4e49\u7c7b\u540d\uff0c\u5373\u53ef\u5728 Java \u4e2d\u521b\u5efa\u9ad8\u9636\u51fd\u6570\u3002\u8fd9\u4e9b\u9ad8\u9636\u51fd\u6570\u5728\u5b9e\u6218\u4e2d\u53ef\u7528\u4e8e\u5bf9\u5217\u8868\u8fdb\u884c\u8fc7\u6ee4\u548c\u6620\u5c04\u7b49\u64cd\u4f5c\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1730026832671e1d50cf002.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u7684\u9ad8\u9636\u51fd\u6570<\/strong><\/p>\n<p>\u9ad8\u9636\u51fd\u6570\u662f\u6307\u53ef\u4ee5\u63a5\u53d7\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u6216\u8fd4\u56de\u51fd\u6570\u7684\u51fd\u6570\u3002\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3\u548c\u533f\u540d\u5185\u90e8\u7c7b\u6765\u5b9e\u73b0\u9ad8\u9636\u51fd\u6570\u3002<\/p>\n<p><strong>\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u4e00\u79cd\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\u3002\u5728 Java \u4e2d\uff0c<code>Predicate<\/code>\u3001<code>Function<\/code>\u3001<code>Consumer<\/code> \u7b49\u63a5\u53e3\u90fd\u662f\u5e38\u89c1\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\u3002<\/p>\n<pre>\/\/ \u5b9a\u4e49\u4e00\u4e2a Predicate \u63a5\u53e3\n@FunctionalInterface\npublic interface Predicate&lt;T&gt; {\n    boolean test(T t);\n}\n\n\/\/ \u4f7f\u7528 Predicate \u63a5\u53e3\u5b9e\u73b0\u9ad8\u9636\u51fd\u6570\nPredicate&lt;Integer&gt; isEven = x -&gt; x % 2 == 0;<\/pre>\n<p><strong>\u4f7f\u7528\u533f\u540d\u5185\u90e8\u7c7b<\/strong><\/p>\n<p>\u533f\u540d\u5185\u90e8\u7c7b\u662f\u4e00\u79cd\u65e0\u9700\u663e\u5f0f\u5b9a\u4e49\u7c7b\u540d\u7684\u5185\u90e8\u7c7b\u3002\u53ef\u4ee5\u5728 Java \u4e2d\u4f7f\u7528\u533f\u540d\u5185\u90e8\u7c7b\u6765\u521b\u5efa\u9ad8\u9636\u51fd\u6570\u3002<\/p>\n<pre>\/\/ \u4f7f\u7528\u533f\u540d\u5185\u90e8\u7c7b\u5b9e\u73b0\u9ad8\u9636\u51fd\u6570\nFunction&lt;Integer, Integer&gt; square = new Function&lt;Integer, Integer&gt;() {\n    @Override\n    public Integer apply(Integer x) {\n        return x * x;\n    }\n};<\/pre>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u9ad8\u9636\u51fd\u6570\u7684\u5b9e\u6218\u6848\u4f8b\uff1a<\/p>\n<pre>\/\/ \u4f7f\u7528\u9ad8\u9636\u51fd\u6570\u5bf9\u5217\u8868\u8fdb\u884c\u8fc7\u6ee4\u548c\u6620\u5c04\nList&lt;Integer&gt; numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);\n\n\/\/ \u8fc7\u6ee4\u5076\u6570\nPredicate&lt;Integer&gt; isEven = x -&gt; x % 2 == 0;\n\n\/\/ \u6620\u5c04\u5230\u5e73\u65b9\nFunction&lt;Integer, Integer&gt; square = x -&gt; x * x;\n\n\/\/ \u4f7f\u7528 filter \u548c map \u8fdb\u884c\u8fc7\u6ee4\u548c\u6620\u5c04\nList&lt;Integer&gt; squaresOfEven = numbers.stream()\n        .filter(isEven)\n        .map(square)\n        .collect(Collectors.toList());\n\n\/\/ \u6253\u5370\u7ed3\u679c\nSystem.out.println(squaresOfEven); \/\/ \u8f93\u51fa\uff1a[4, 16, 36, 64, 100]<\/pre>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aJava \u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u7684\u9ad8\u9636\u51fd\u6570\u5982\u4f55\u5b9e\u73b0\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u7684\u9ad8\u9636\u51fd\u6570&#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-203044","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203044","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=203044"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203044\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203044"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203044"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203044"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}