{"id":203076,"date":"2025-05-22T11:22:20","date_gmt":"2025-05-22T03:22:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203076\/"},"modified":"2025-05-22T11:22:20","modified_gmt":"2025-05-22T03:22:20","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e4%b8%ad%e9%ab%98%e9%98%b6%e5%87%bd%e6%95%b0%e7%9a%84%e5%ba%94%e7%94%a8%e5%9c%ba%e6%99%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203076\/","title":{"rendered":"Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u9ad8\u9636\u51fd\u6570\u7684\u5e94\u7528\u573a\u666f\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u9ad8\u9636\u51fd\u6570\u7684\u5e94\u7528\u573a\u666f\uff1f<\/h1>\n<p>\u201c\u7eb5\u6709\u75be\u98ce\u6765\uff0c\u4eba\u751f\u4e0d\u8a00\u5f03\u201d\uff0c\u8fd9\u53e5\u8bdd\u9001\u7ed9\u6b63\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u7684\u670b\u53cb\u4eec\uff0c\u4e5f\u5e0c\u671b\u5728\u9605\u8bfb\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJava\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u9ad8\u9636\u51fd\u6570\u7684\u5e94\u7528\u573a\u666f\uff1f\u300b<\/span>\u540e\uff0c\u80fd\u591f\u771f\u7684\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u6211\u4e5f\u4f1a\u5728\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\uff0c\u9646\u7eed\u66f4\u65b0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u6280\u672f\u6587\u7ae0\uff0c\u6709\u597d\u7684\u5efa\u8bae\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u975e\u5e38\u611f\u8c22\uff01<\/p>\n<p>\u9ad8\u9636\u51fd\u6570\u662f\u4e00\u79cd\u53ef\u4ee5\u64cd\u4f5c\u51fd\u6570\u7684\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u63a5\u6536\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u6216\u8fd4\u56de\u51fd\u6570\u4f5c\u4e3a\u7ed3\u679c\u3002Java \u4e2d\u7684\u9ad8\u9636\u51fd\u6570\u63a5\u53e3\u5305\u62ec Function\u3001Predicate\u3001Consumer \u7b49\u3002\u9ad8\u9636\u51fd\u6570\u5e7f\u6cdb\u5e94\u7528\u4e8e\u6d41\u5904\u7406\u3001\u6392\u5e8f\u3001\u8c13\u8bcd\u903b\u8f91\u548c\u5f02\u5e38\u5904\u7406\u7b49\u573a\u666f\u3002\u4f8b\u5982\uff0c\u4f7f\u7528 map() \u51fd\u6570\u5bf9\u6d41\u4e2d\u7684\u5143\u7d20\u8fdb\u884c\u6620\u5c04\uff1b\u4f7f\u7528 Comparator \u6309\u7167\u6307\u5b9a\u6761\u4ef6\u5bf9\u5bf9\u8c61\u8fdb\u884c\u6392\u5e8f\uff1b\u4f7f\u7528 Predicate \u68c0\u67e5\u6761\u4ef6\u662f\u5426\u6210\u7acb\uff1b\u4f7f\u7528 Consumer \u5904\u7406\u5f02\u5e38\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1730040090671e511a9b138.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u4ec0\u4e48\u662f\u9ad8\u9636\u51fd\u6570\uff1f<\/strong><\/p>\n<p>\u9ad8\u9636\u51fd\u6570\u662f\u4e00\u79cd\u53ef\u4ee5\u63a5\u6536\u5176\u4ed6\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u6216\u8fd4\u56de\u51fd\u6570\u4f5c\u4e3a\u7ed3\u679c\u7684\u51fd\u6570\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u9ad8\u9636\u51fd\u6570\u53ef\u4ee5\u64cd\u4f5c\u51fd\u6570\u3002<\/p>\n<p><strong>Java \u4e2d\u7684\u9ad8\u9636\u51fd\u6570<\/strong><\/p>\n<p>Java \u4e2d\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e93 <code>java.util.function<\/code> \u5b9a\u4e49\u4e86\u591a\u4e2a\u9ad8\u9636\u51fd\u6570\u63a5\u53e3\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li><code>Function&lt;T, R&gt;<\/code>\uff1a\u5c06 <code>T<\/code> \u7c7b\u578b\u7684\u6570\u636e\u6620\u5c04\u5230 <code>R<\/code> \u7c7b\u578b\u7684\u6570\u636e\u3002<\/li>\n<li><code>Predicate&lt;T&gt;<\/code>\uff1a\u68c0\u67e5 <code>T<\/code> \u7c7b\u578b\u6570\u636e\u662f\u5426\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6\u3002<\/li>\n<li><code>Consumer&lt;T&gt;<\/code>\uff1a\u5bf9 <code>T<\/code> \u7c7b\u578b\u7684\u6570\u636e\u6267\u884c\u64cd\u4f5c\u800c\u4e0d\u8fd4\u56de\u4efb\u4f55\u503c\u3002<\/li>\n<\/ul>\n<p><strong>\u9ad8\u9636\u51fd\u6570\u7684\u5e94\u7528\u573a\u666f<\/strong><\/p>\n<p>\u9ad8\u9636\u51fd\u6570\u5728 Java \u4e2d\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u5e7f\u6cdb\u4f7f\u7528\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u573a\u666f\uff1a<\/p>\n<p><strong>\u6d41\u5904\u7406\uff1a<\/strong><\/p>\n<p>\u6d41 API \u63d0\u4f9b\u4e86 <code>map()<\/code>, <code>filter()<\/code> \u548c <code>forEach()<\/code> \u7b49\u9ad8\u9636\u51fd\u6570\uff0c\u7528\u4e8e\u5904\u7406\u5143\u7d20\u6d41\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>List&lt;Integer&gt; numbers = List.of(1, 2, 3, 4, 5);\nList&lt;Integer&gt; squaredNumbers = numbers.stream()\n  .map(n -&gt; n * n)  \/\/ \u4f7f\u7528 Function \u9ad8\u9636\u51fd\u6570\u5bf9\u6bcf\u4e2a\u5143\u7d20\u8fdb\u884c\u6620\u5c04\n  .toList();<\/pre>\n<p><strong>\u6392\u5e8f\uff1a<\/strong><\/p>\n<p><code>Comparator<\/code> \u63a5\u53e3\u662f\u4e00\u4e2a\u9ad8\u9636\u51fd\u6570\uff0c\u53ef\u7528\u4e8e\u6839\u636e\u7279\u5b9a\u6761\u4ef6\u5bf9\u5bf9\u8c61\u8fdb\u884c\u6392\u5e8f\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>List&lt;String&gt; names = List.of(\"Alice\", \"Bob\", \"Cindy\");\nnames.sort(Comparator.comparing(String::length));  \/\/ \u4f7f\u7528 Comparator \u9ad8\u9636\u51fd\u6570\u6309\u957f\u5ea6\u6392\u5e8f<\/pre>\n<p><strong>\u8c13\u8bcd\u903b\u8f91\uff1a<\/strong><\/p>\n<p><code>Predicate<\/code> \u63a5\u53e3\u662f\u4e00\u4e2a\u9ad8\u9636\u51fd\u6570\uff0c\u7528\u4e8e\u68c0\u67e5\u6761\u4ef6\u662f\u5426\u6210\u7acb\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>List&lt;Integer&gt; numbers = List.of(1, 2, 3, 4, 5);\nPredicate&lt;Integer&gt; isEven = n -&gt; n % 2 == 0;  \/\/ \u5b9a\u4e49 Predicate \u9ad8\u9636\u51fd\u6570\nList&lt;Integer&gt; evenNumbers = numbers.stream()\n  .filter(isEven)  \/\/ \u4f7f\u7528 Predicate \u9ad8\u9636\u51fd\u6570\u8fc7\u6ee4\u5076\u6570\n  .toList();<\/pre>\n<p><strong>\u5904\u7406\u5f02\u5e38\uff1a<\/strong><\/p>\n<p><code>Consumer&lt;Throwable&gt;<\/code> \u63a5\u53e3\u662f\u4e00\u4e2a\u9ad8\u9636\u51fd\u6570\uff0c\u53ef\u7528\u4e8e\u5904\u7406\u5f02\u5e38\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>try {\n  \/\/ \u6267\u884c\u9700\u8981\u5904\u7406\u5f02\u5e38\u7684\u4ee3\u7801\n} catch (Exception e) {\n  Consumer&lt;Throwable&gt; errorHandler = System.err::println;\n  errorHandler.accept(e);  \/\/ \u4f7f\u7528 Consumer \u9ad8\u9636\u51fd\u6570\u5904\u7406\u5f02\u5e38\n}<\/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\u9ad8\u9636\u51fd\u6570\u7684\u5e94&#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-203076","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203076","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=203076"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203076\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203076"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203076"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203076"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}