{"id":202893,"date":"2025-05-22T11:00:24","date_gmt":"2025-05-22T03:00:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202893\/"},"modified":"2025-05-22T11:00:24","modified_gmt":"2025-05-22T03:00:24","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e6%8e%a5%e5%8f%a3%e5%9c%a8%e9%9b%86%e5%90%88%e5%92%8c%e6%95%b0%e7%bb%84%e6%93%8d%e4%bd%9c%e4%b8%ad%e7%9a%84%e5%a6%99%e7%94%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202893\/","title":{"rendered":"Java\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u96c6\u5408\u548c\u6570\u7ec4\u64cd\u4f5c\u4e2d\u7684\u5999\u7528\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u96c6\u5408\u548c\u6570\u7ec4\u64cd\u4f5c\u4e2d\u7684\u5999\u7528\uff1f<\/h1>\n<p>\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u52aa\u529b\u5b66\u4e60\u5427\uff01\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJava\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u96c6\u5408\u548c\u6570\u7ec4\u64cd\u4f5c\u4e2d\u7684\u5999\u7528\uff1f\u300b<\/span>\u4e3b\u8981\u8bb2\u89e3\u4e86<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6211\u4f1a\u5728\u4e2d\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u7cfb\u5217\u6587\u7ae0\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u5e76\u79ef\u6781\u7559\u8a00\u5efa\u8bae\u3002\u4e0b\u9762\u5c31\u5148\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u672c\u7bc7\u6b63\u6587\u5185\u5bb9\u5427\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n<p>Java \u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u96c6\u5408\u548c\u6570\u7ec4\u64cd\u4f5c\u4e2d\u5927\u653e\u5f02\u5f69\uff0c\u5b83\u4eec\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u7ec3\u3001\u53ef\u91cd\u7528\u4e14\u6613\u8bfb\u7684\u673a\u5236\uff1a\u5728\u96c6\u5408\u64cd\u4f5c\u4e2d\uff0c\u51fd\u6570\u5f0f\u63a5\u53e3\uff08\u5982 Predicate\u3001Consumer\u3001Function\uff09\u7528\u4e8e\u8fc7\u6ee4\u3001\u6d88\u8d39\u548c\u8f6c\u6362\u5143\u7d20\uff0c\u4f7f\u5176\u64cd\u4f5c\u7b80\u6d01\u9ad8\u6548\u3002\u5728\u6570\u7ec4\u64cd\u4f5c\u4e2d\uff0c\u51fd\u6570\u5f0f\u63a5\u53e3\uff08\u5982 IntStream\u3001IntPredicate\u3001IntConsumer\u3001IntFunction\uff09\u7528\u4e8e\u8868\u793a\u548c\u5904\u7406\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff0c\u63d0\u4f9b\u4e0e\u96c6\u5408\u64cd\u4f5c\u7c7b\u4f3c\u7684\u5f3a\u5927\u529f\u80fd\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1729990728671d90485c228.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u96c6\u5408\u548c\u6570\u7ec4\u64cd\u4f5c\u4e2d\u7684\u5999\u7528<\/strong><\/p>\n<p>Java \u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u96c6\u5408\u548c\u6570\u7ec4\u64cd\u4f5c\u4e2d\u53d1\u6325\u7740\u81f3\u5173\u91cd\u8981\u7684\u4f5c\u7528\uff0c\u5b83\u4eec\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u6d01\u3001\u53ef\u91cd\u7528\u4e14\u53ef\u8bfb\u6027\u5f3a\u7684\u673a\u5236\u6765\u5904\u7406\u8fd9\u4e9b\u6570\u636e\u7ed3\u6784\u3002<\/p>\n<p><strong>\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\u3002lambda \u8868\u8fbe\u5f0f\u6216\u65b9\u6cd5\u5f15\u7528\u53ef\u4ee5\u5b9e\u73b0\u6b64\u62bd\u8c61\u65b9\u6cd5\u3002<\/p>\n<p><strong>\u5728\u96c6\u5408\u64cd\u4f5c\u4e2d\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3<\/strong><\/p>\n<p>Java Collections Framework \u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u53ef\u7528\u4e8e\u6267\u884c\u5404\u79cd\u96c6\u5408\u64cd\u4f5c\u3002<\/p>\n<ul>\n<li><strong>Stream\uff1a<\/strong><code>Stream<\/code> \u63a5\u53e3\u7528\u4e8e\u8868\u793a\u5143\u7d20\u5e8f\u5217\uff0c\u5e76\u63d0\u4f9b\u5bf9\u5e8f\u5217\u8fdb\u884c\u60f0\u6027\u8f6c\u6362\u548c\u805a\u5408\u64cd\u4f5c\u7684\u65b9\u6cd5\u3002<\/li>\n<li>**Predicate\uff1a<code>**<\/code>Predicate<code> \u63a5\u53e3\u7528\u4e8e\u6d4b\u8bd5\u5bf9\u8c61\u7684\u5e03\u5c14\u503c\uff0c\u901a\u5e38\u4e0e <\/code>filter` \u65b9\u6cd5\u7ed3\u5408\u4f7f\u7528\u4ee5\u8fc7\u6ee4\u96c6\u5408\u3002<\/li>\n<li>**Consumer\uff1a<code>Consumer<\/code> \u63a5\u53e3\u7528\u4e8e\u6267\u884c\u5bf9\u8c61\u7684\u67d0\u79cd\u64cd\u4f5c\uff08\u4f8b\u5982\u6253\u5370\uff09\uff0c\u901a\u5e38\u4e0e <code>forEach<\/code> \u65b9\u6cd5\u7ed3\u5408\u4f7f\u7528\u3002<\/li>\n<li>**Function\uff1a<code>Function<\/code> \u63a5\u53e3\u7528\u4e8e\u4ece\u4e00\u4e2a\u5bf9\u8c61\u8f6c\u6362\u5230\u53e6\u4e00\u4e2a\u5bf9\u8c61\uff0c\u901a\u5e38\u4e0e <code>map<\/code> \u65b9\u6cd5\u7ed3\u5408\u4f7f\u7528\u4ee5\u8f6c\u6362\u96c6\u5408\u5143\u7d20\u3002<\/li>\n<\/ul>\n<p><strong>\u4f8b 1\uff1a\u4f7f\u7528 Predicate \u8fc7\u6ee4\u96c6\u5408<\/strong><\/p>\n<pre>List&lt;String&gt; names = List.of(\"Alice\", \"Bob\", \"Carol\", \"Dave\");\nList&lt;String&gt; filteredNames = names.stream()\n                                  .filter(name -&gt; name.startsWith(\"A\"))\n                                  .toList();\nSystem.out.println(filteredNames);  \/\/ [Alice]<\/pre>\n<p><strong>\u5728\u6570\u7ec4\u64cd\u4f5c\u4e2d\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u63a5\u53e3\u4e5f\u53ef\u7528\u4e8e\u5904\u7406\u6570\u7ec4\u3002<\/p>\n<ul>\n<li>**IntStream\uff1a<code>**<\/code>IntStream` \u63a5\u53e3\u7528\u4e8e\u8868\u793a int \u503c\u5e8f\u5217\uff0c\u5e76\u63d0\u4f9b\u5bf9\u5e8f\u5217\u8fdb\u884c\u60f0\u6027\u8f6c\u6362\u548c\u805a\u5408\u64cd\u4f5c\u7684\u65b9\u6cd5\u3002<\/li>\n<li>**IntPredicate\uff1a<code>**<\/code>IntPredicate<code> \u63a5\u53e3\u7528\u4e8e\u6d4b\u8bd5 int \u503c\u7684\u5e03\u5c14\u503c\uff0c\u901a\u5e38\u4e0e <\/code>filter` \u65b9\u6cd5\u7ed3\u5408\u4f7f\u7528\u4ee5\u8fc7\u6ee4\u6570\u7ec4\u3002<\/li>\n<li>**IntConsumer\uff1a<code>IntConsumer<\/code> \u63a5\u53e3\u7528\u4e8e\u6267\u884c int \u503c\u7684\u67d0\u79cd\u64cd\u4f5c\uff0c\u901a\u5e38\u4e0e <code>forEach<\/code> \u65b9\u6cd5\u7ed3\u5408\u4f7f\u7528\u3002<\/li>\n<li>**IntFunction\uff1a<code>IntFunction<\/code> \u63a5\u53e3\u7528\u4e8e\u4ece int \u503c\u8f6c\u6362\u5230\u53e6\u4e00\u4e2a\u503c\uff0c\u901a\u5e38\u4e0e <code>map<\/code> \u65b9\u6cd5\u7ed3\u5408\u4f7f\u7528\u4ee5\u8f6c\u6362\u6570\u7ec4\u5143\u7d20\u3002<\/li>\n<\/ul>\n<p><strong>\u4f8b 2\uff1a\u4f7f\u7528 IntStream \u67e5\u627e\u6570\u7ec4\u4e2d\u7684\u6700\u5927\u503c<\/strong><\/p>\n<pre>int[] numbers = {1, 5, 7, 3, 9};\nint maxValue = Arrays.stream(numbers)\n                     .max()\n                     .getAsInt();\nSystem.out.println(\"Maximum value: \" + maxValue);  \/\/ 9<\/pre>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>Java \u51fd\u6570\u5f0f\u63a5\u53e3\u4e3a\u96c6\u5408\u548c\u6570\u7ec4\u64cd\u4f5c\u63d0\u4f9b\u4e86\u6781\u5927\u7684\u7075\u6d3b\u6027\u3002\u5b83\u4eec\u5141\u8bb8\u5f00\u53d1\u4eba\u5458\u7f16\u5199\u7b80\u6d01\u3001\u53ef\u8bfb\u6027\u548c\u53ef\u91cd\u7528\u7684\u4ee3\u7801\uff0c\u4ece\u800c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u5f00\u53d1\u6548\u7387\u548c\u7ef4\u62a4\u6027\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300aJava\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u96c6\u5408\u548c\u6570\u7ec4\u64cd\u4f5c\u4e2d\u7684\u5999\u7528\uff1f\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u6570\u7ec4\u64cd\u4f5c,\u96c6\u5408\u64cd\u4f5c\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u96c6\u5408\u548c\u6570\u7ec4\u64cd&#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-202893","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202893","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=202893"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202893\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}