{"id":65696,"date":"2025-05-03T09:38:44","date_gmt":"2025-05-03T01:38:44","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65696\/"},"modified":"2025-05-03T09:38:44","modified_gmt":"2025-05-03T01:38:44","slug":"java%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e5%8e%bb%e9%99%a4%e7%9b%b8%e5%90%8c%e5%85%83%e7%b4%a0-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65696\/","title":{"rendered":"java\u6570\u7ec4\u600e\u4e48\u53bb\u9664\u76f8\u540c\u5143\u7d20"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\u53bb\u9664\u6570\u7ec4\u4e2d\u91cd\u590d\u5143\u7d20\u7684\u5e38\u89c1\u65b9\u6cd5\u5305\u62ec\uff1a1. \u4f7f\u7528 hashset \u5b58\u50a8\u4e0d\u91cd\u590d\u5143\u7d20\u5e76\u8f6c\u6362\u56de\u6570\u7ec4\uff1b2. \u4f7f\u7528 linkedhashset \u4fdd\u7559\u5143\u7d20\u987a\u5e8f\u53bb\u9664\u91cd\u590d\u5143\u7d20\uff1b3. \u4f7f\u7528 arrays.stream() \u548c distinct() \u65b9\u6cd5\u53bb\u9664\u91cd\u590d\u5143\u7d20\uff1b4. \u4f7f\u7528 streamex \u5e93\u7684 unique() \u65b9\u6cd5\u53bb\u9664\u91cd\u590d\u5143\u7d20\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111307305817362.jpg\" class=\"aligncenter\" title=\"java\u6570\u7ec4\u600e\u4e48\u53bb\u9664\u76f8\u540c\u5143\u7d20\u63d2\u56fe\" alt=\"java\u6570\u7ec4\u600e\u4e48\u53bb\u9664\u76f8\u540c\u5143\u7d20\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u53bb\u9664 Java \u6570\u7ec4\u4e2d\u91cd\u590d\u7684\u5143\u7d20<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u53bb\u9664\u6570\u7ec4\u4e2d\u91cd\u590d\u5143\u7d20\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u6700\u5e38\u89c1\u7684\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 HashSet<\/strong><\/p>\n<p>HashSet \u662f\u4e00\u79cd\u96c6\u5408\u7c7b\uff0c\u5b83\u4e0d\u4f1a\u5b58\u50a8\u91cd\u590d\u5143\u7d20\u3002\u6211\u4eec\u53ef\u4ee5\u5c06\u6570\u7ec4\u5143\u7d20\u6dfb\u52a0\u5230 HashSet \u4e2d\uff0c\u7136\u540e\u5c06\u5176\u8f6c\u6362\u56de\u6570\u7ec4\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>\/\/ \u521b\u5efa\u4e00\u4e2a HashSet \u6765\u5b58\u50a8\u4e0d\u91cd\u590d\u5143\u7d20\nSet&lt;Integer&gt; uniqueElements = new HashSet&lt;&gt;();\n\n\/\/ \u5c06\u6570\u7ec4\u5143\u7d20\u6dfb\u52a0\u5230 HashSet\nfor (int element : array) {\n    uniqueElements.add(element);\n}\n\n\/\/ \u5c06 HashSet \u8f6c\u6362\u4e3a\u6570\u7ec4\nint[] uniqueArray = new int[uniqueElements.size()];\nint index = 0;\nfor (int element : uniqueElements) {\n    uniqueArray[index++] = element;\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528 LinkedHashSet<\/strong><\/p>\n<p>LinkedHashSet \u662f HashSet \u7684\u5b50\u7c7b\uff0c\u5b83\u4fdd\u7559\u4e86\u5143\u7d20\u7684\u63d2\u5165\u987a\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 LinkedHashSet \u6765\u83b7\u5f97\u53bb\u9664\u91cd\u590d\u5143\u7d20\u540e\u7684\u6570\u7ec4\uff0c\u540c\u65f6\u4fdd\u7559\u5143\u7d20\u7684\u539f\u59cb\u987a\u5e8f\u3002<\/p>\n<pre>Set&lt;Integer&gt; uniqueElements = new LinkedHashSet&lt;&gt;();\nfor (int element : array) {\n    uniqueElements.add(element);\n}\n\nint[] uniqueArray = new int[uniqueElements.size()];\nint index = 0;\nfor (int element : uniqueElements) {\n    uniqueArray[index++] = element;\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528 Arrays.stream() \u548c distinct()<\/strong><\/p>\n<p>Java 8 \u4e2d\u5f15\u5165\u4e86 Arrays.stream(), \u5b83\u5141\u8bb8\u6211\u4eec\u4f7f\u7528\u6d41 API \u5904\u7406\u6570\u7ec4\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 distinct() \u65b9\u6cd5\u6765\u53bb\u9664\u91cd\u590d\u5143\u7d20\u3002<\/p>\n<pre>int[] uniqueArray = Arrays.stream(array).distinct().toArray();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>4. \u4f7f\u7528 StreamEx<\/strong><\/p>\n<p>StreamEx \u662f Java \u7684\u7b2c\u4e09\u65b9\u5e93\uff0c\u5b83\u63d0\u4f9b\u4e86\u6d41\u5f0f\u5904\u7406\u7684\u9644\u52a0\u529f\u80fd\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 StreamEx \u7684 unique() \u65b9\u6cd5\u6765\u53bb\u9664\u91cd\u590d\u5143\u7d20\u3002<\/p>\n<pre>int[] uniqueArray = IntStream.of(array).unique().toArray();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u600e\u4e48\u53bb\u9664\u76f8\u540c\u5143\u7d20\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 java \u4e2d\u53bb\u9664\u6570\u7ec4\u4e2d\u91cd\u590d\u5143\u7d20\u7684\u5e38\u89c1\u65b9\u6cd5\u5305\u62ec\uff1a1. \u4f7f\u7528 hashset \u5b58\u50a8\u4e0d\u91cd\u590d\u5143\u7d20\u5e76\u8f6c\u6362\u56de\u6570\u7ec4\uff1b2. \u4f7f\u7528 linkedhashset \u4fdd\u7559\u5143\u7d20\u987a\u5e8f\u53bb\u9664\u91cd\u590d\u5143\u7d20\uff1b3. \u4f7f\u7528 arrays.stream() \u548c distinct() \u65b9\u6cd5\u53bb\u9664\u91cd\u590d\u5143\u7d20\uff1b4. \u4f7f\u7528 streamex \u5e93\u7684 unique() \u65b9\u6cd5\u53bb\u9664\u91cd\u590d\u5143\u7d20\u3002 \u5982\u4f55\u53bb\u9664 Java \u6570\u7ec4\u4e2d\u91cd\u590d\u7684\u5143\u7d20 \u5728 Java \u4e2d\uff0c\u53bb\u9664\u6570\u7ec4\u4e2d\u91cd\u590d\u5143\u7d20\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u6700\u5e38\u89c1\u7684\u65b9\u6cd5\uff1a 1. \u4f7f\u7528 HashSet HashSet \u662f\u4e00\u79cd\u96c6\u5408\u7c7b\uff0c\u5b83\u4e0d\u4f1a\u5b58\u50a8\u91cd\u590d\u5143\u7d20\u3002\u6211\u4eec\u53ef\u4ee5\u5c06\u6570\u7ec4\u5143\u7d20\u6dfb\u52a0\u5230 HashSet \u4e2d\uff0c\u7136\u540e\u5c06\u5176\u8f6c\u6362\u56de\u6570\u7ec4\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \/\/ \u521b\u5efa\u4e00\u4e2a HashSet \u6765\u5b58\u50a8\u4e0d\u91cd\u590d\u5143\u7d20 Set&lt;Integer&gt; uniqueElements = new HashSet&lt;&gt;(); \/\/ \u5c06\u6570\u7ec4\u5143\u7d20\u6dfb\u52a0\u5230 HashSet for (int element : array) { uniqueElements.add(element); } \/\/ \u5c06 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-65696","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65696","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=65696"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65696\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65696"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65696"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65696"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}