{"id":38447,"date":"2024-11-26T09:17:25","date_gmt":"2024-11-26T01:17:25","guid":{"rendered":"https:\/\/fwq.ai\/blog\/38447\/"},"modified":"2024-11-26T09:17:25","modified_gmt":"2024-11-26T01:17:25","slug":"%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e7%94%b1%e5%a4%a7%e5%88%b0%e5%b0%8f%e6%8e%92%e5%ba%8fjava","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/38447\/","title":{"rendered":"\u6570\u7ec4\u600e\u4e48\u7531\u5927\u5230\u5c0f\u6392\u5e8fjava"},"content":{"rendered":"<blockquote><p>\n  \u53ef\u4ee5\u7528 java \u5bf9\u6570\u7ec4\u8fdb\u884c\u9012\u51cf\u6392\u5e8f\uff1a\u4f7f\u7528 arrays.sort() \u65b9\u6cd5\u5e76\u7ed3\u5408 collections.reverseorder(): \u5c06\u6570\u7ec4\u5347\u5e8f\u6392\u5e8f\u540e\u53cd\u8f6c\u3002\u4f7f\u7528 comparator \u63a5\u53e3\u521b\u5efa\u6bd4\u8f83\u5668\uff0c\u5c06\u5143\u7d20\u6309\u9012\u51cf\u987a\u5e8f\u6bd4\u8f83\uff0c\u518d\u7528 arrays.sort() \u65b9\u6cd5\u6392\u5e8f\u3002\u4f7f\u7528 stream api \u7684 intstream.of(arr).sorted(comparator.reverseorder()).toarray() \u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u6d41\uff0c\u6309\u9012\u51cf\u987a\u5e8f\u6392\u5e8f\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/15\/2024111501581520521.jpg\" class=\"aligncenter\" title=\"\u6570\u7ec4\u600e\u4e48\u7531\u5927\u5230\u5c0f\u6392\u5e8fjava\u63d2\u56fe\" alt=\"\u6570\u7ec4\u600e\u4e48\u7531\u5927\u5230\u5c0f\u6392\u5e8fjava\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528 Java \u5bf9\u6570\u7ec4\u8fdb\u884c\u9012\u51cf\u6392\u5e8f<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u5bf9\u4e00\u4e2a\u6570\u7ec4\u8fdb\u884c\u9012\u51cf\u6392\u5e8f\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 Arrays.sort() \u65b9\u6cd5<\/strong><\/p>\n<p>Arrays.sort() \u65b9\u6cd5\u662f Java \u4e2d\u7528\u4e8e\u5bf9\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f\u7684\u6807\u51c6\u65b9\u6cd5\u3002\u5b83\u91c7\u7528\u4e00\u4e2a\u6570\u7ec4\u4f5c\u4e3a\u8f93\u5165\u53c2\u6570\uff0c\u5e76\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u6309\u5347\u5e8f\u8fdb\u884c\u6392\u5e8f\u3002\u8981\u8fdb\u884c\u9012\u51cf\u6392\u5e8f\uff0c\u53ef\u4ee5\u5c06 Arrays.sort() \u65b9\u6cd5\u4e0e Collections.reverseOrder() \u65b9\u6cd5\u7ed3\u5408\u4f7f\u7528\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<pre>import java.util.Arrays;\nimport java.util.Collections;\n\npublic class ArraySortDescending {\n\n    public static void main(String[] args) {\n        int[] arr = {5, 2, 8, 3, 1};\n\n        \/\/ \u5bf9\u6570\u7ec4\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f\n        Arrays.sort(arr);\n\n        \/\/ \u4f7f\u7528 Collections.reverseOrder() \u65b9\u6cd5\u5c06\u6570\u7ec4\u53cd\u8f6c\uff0c\u5b9e\u73b0\u9012\u51cf\u6392\u5e8f\n        Collections.reverseOrder(arr);\n\n        \/\/ \u8f93\u51fa\u6392\u5e8f\u540e\u7684\u6570\u7ec4\n        System.out.println(Arrays.toString(arr));\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528 Comparator<\/strong><\/p>\n<p>\u53e6\u4e00\u79cd\u5bf9\u6570\u7ec4\u8fdb\u884c\u9012\u51cf\u6392\u5e8f\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 Comparator \u63a5\u53e3\u3002Comparator \u63a5\u53e3\u63d0\u4f9b\u4e86\u4e00\u79cd\u6bd4\u8f83\u4e24\u4e2a\u5143\u7d20\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6839\u636e\u8fd9\u4e2a\u65b9\u6cd5\u5bf9\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u3002<\/p>\n<p>\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<pre>import java.util.Arrays;\nimport java.util.Comparator;\n\npublic class ArraySortDescendingWithComparator {\n\n    public static void main(String[] args) {\n        int[] arr = {5, 2, 8, 3, 1};\n\n        \/\/ \u521b\u5efa\u4e00\u4e2a\u6bd4\u8f83\u5668\uff0c\u7528\u4e8e\u5c06\u4e24\u4e2a\u5143\u7d20\u6309\u9012\u51cf\u987a\u5e8f\u8fdb\u884c\u6bd4\u8f83\n        Comparator&lt;Integer&gt; comparator = Comparator.reverseOrder();\n\n        \/\/ \u4f7f\u7528 Arrays.sort() \u65b9\u6cd5\u5e76\u4f20\u5165\u6bd4\u8f83\u5668\uff0c\u5bf9\u6570\u7ec4\u8fdb\u884c\u9012\u51cf\u6392\u5e8f\n        Arrays.sort(arr, comparator);\n\n        \/\/ \u8f93\u51fa\u6392\u5e8f\u540e\u7684\u6570\u7ec4\n        System.out.println(Arrays.toString(arr));\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528 Stream<\/strong><\/p>\n<p>Java 8 \u53ca\u66f4\u9ad8\u7248\u672c\u53ef\u4ee5\u4f7f\u7528 Stream API \u5bf9\u6570\u7ec4\u8fdb\u884c\u9012\u51cf\u6392\u5e8f\u3002Stream API \u63d0\u4f9b\u4e86\u4e00\u79cd\u6d41\u5f0f\u5904\u7406\u6570\u636e\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u5bf9\u6570\u636e\u8fdb\u884c\u5404\u79cd\u64cd\u4f5c\uff0c\u5305\u62ec\u6392\u5e8f\u3002<\/p>\n<p>\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<pre>import java.util.Arrays;\nimport java.util.stream.IntStream;\n\npublic class ArraySortDescendingWithStream {\n\n    public static void main(String[] args) {\n        int[] arr = {5, 2, 8, 3, 1};\n\n        \/\/ \u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a IntStream\n        IntStream stream = IntStream.of(arr);\n\n        \/\/ \u4f7f\u7528 sorted() \u65b9\u6cd5\u548c Comparator.reverseOrder() \u5bf9\u6d41\u8fdb\u884c\u9012\u51cf\u6392\u5e8f\n        int[] sortedArr = stream.sorted(Comparator.reverseOrder()).toArray();\n\n        \/\/ \u8f93\u51fa\u6392\u5e8f\u540e\u7684\u6570\u7ec4\n        System.out.println(Arrays.toString(sortedArr));\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u6570\u7ec4\u600e\u4e48\u7531\u5927\u5230\u5c0f\u6392\u5e8fjava\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u53ef\u4ee5\u7528 java \u5bf9\u6570\u7ec4\u8fdb\u884c\u9012\u51cf\u6392\u5e8f\uff1a\u4f7f\u7528 arrays.sort() \u65b9\u6cd5\u5e76\u7ed3\u5408 collections.reverseorder(): \u5c06\u6570\u7ec4\u5347\u5e8f\u6392\u5e8f\u540e\u53cd\u8f6c\u3002\u4f7f\u7528 comparator \u63a5\u53e3\u521b\u5efa\u6bd4\u8f83\u5668\uff0c\u5c06\u5143\u7d20\u6309\u9012\u51cf\u987a\u5e8f\u6bd4\u8f83\uff0c\u518d\u7528 arrays.sort() \u65b9\u6cd5\u6392\u5e8f\u3002\u4f7f\u7528 stream api \u7684 intstream.of(arr).sorted(comparator.reverseorder()).toarray() \u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u6d41\uff0c\u6309\u9012\u51cf\u987a\u5e8f\u6392\u5e8f\u3002 \u5982\u4f55\u4f7f\u7528 Java \u5bf9\u6570\u7ec4\u8fdb\u884c\u9012\u51cf\u6392\u5e8f \u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u5bf9\u4e00\u4e2a\u6570\u7ec4\u8fdb\u884c\u9012\u51cf\u6392\u5e8f\uff1a 1. \u4f7f\u7528 Arrays.sort() \u65b9\u6cd5 Arrays.sort() \u65b9\u6cd5\u662f Java \u4e2d\u7528\u4e8e\u5bf9\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f\u7684\u6807\u51c6\u65b9\u6cd5\u3002\u5b83\u91c7\u7528\u4e00\u4e2a\u6570\u7ec4\u4f5c\u4e3a\u8f93\u5165\u53c2\u6570\uff0c\u5e76\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u6309\u5347\u5e8f\u8fdb\u884c\u6392\u5e8f\u3002\u8981\u8fdb\u884c\u9012\u51cf\u6392\u5e8f\uff0c\u53ef\u4ee5\u5c06 Arrays.sort() \u65b9\u6cd5\u4e0e Collections.reverseOrder() \u65b9\u6cd5\u7ed3\u5408\u4f7f\u7528\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4ee3\u7801\u793a\u4f8b\uff1a import java.util.Arrays; import java.util.Collections; public class ArraySortDescending { public static void main(String[] args) { int[] arr = {5, 2, [&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-38447","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38447","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=38447"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38447\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=38447"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=38447"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=38447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}