{"id":37987,"date":"2024-11-26T13:00:11","date_gmt":"2024-11-26T05:00:11","guid":{"rendered":"https:\/\/fwq.ai\/blog\/37987\/"},"modified":"2024-11-26T13:00:11","modified_gmt":"2024-11-26T05:00:11","slug":"java%e4%b8%ad%e6%80%8e%e4%b9%88%e7%bb%99%e5%af%b9%e8%b1%a1%e6%95%b0%e7%bb%84%e6%8e%92%e5%ba%8f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/37987\/","title":{"rendered":"java\u4e2d\u600e\u4e48\u7ed9\u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\u7ed9\u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a1. \u4f7f\u7528 arrays.sort() \u65b9\u6cd5\uff08\u65f6\u95f4\u590d\u6742\u5ea6 o(n log n)\uff09\uff1b2. \u4f7f\u7528 comparator \u548c arrays.sort() \u65b9\u6cd5\uff08\u9002\u7528\u4e8e\u81ea\u5b9a\u4e49\u6bd4\u8f83\u51fd\u6570\uff09\u3002\u6392\u5e8f\u65b9\u6cd5\u7684\u9009\u62e9\u53d6\u51b3\u4e8e\u6027\u80fd\u3001\u7075\u6d3b\u6027\u3001\u5185\u5b58\u4f7f\u7528\u7b49\u56e0\u7d20\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111314371685760.jpg\" class=\"aligncenter\" title=\"java\u4e2d\u600e\u4e48\u7ed9\u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f\u63d2\u56fe\" alt=\"java\u4e2d\u600e\u4e48\u7ed9\u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u7ed9\u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u7ed9\u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f\u6709\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a<\/p>\n<p><strong>\u65b9\u6cd5 1\uff1a\u4f7f\u7528 Arrays.sort() \u65b9\u6cd5<\/strong><\/p>\n<p>Arrays.sort() \u65b9\u6cd5\u662f\u7ed9\u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f\u7684\u6700\u7b80\u5355\u65b9\u6cd5\u3002\u5b83\u4f7f\u7528\u5f52\u5e76\u6392\u5e8f\u7b97\u6cd5\uff0c\u8be5\u7b97\u6cd5\u5177\u6709 O(n log n) \u7684\u65f6\u95f4\u590d\u6742\u5ea6\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>\/\/ \u521b\u5efa\u4e00\u4e2a Integer \u6570\u7ec4\nInteger[] arr = {5, 2, 8, 3, 1, 7};\n\n\/\/ \u4f7f\u7528 Arrays.sort() \u65b9\u6cd5\u6392\u5e8f\u6570\u7ec4\nArrays.sort(arr);\n\n\/\/ \u6253\u5370\u6392\u5e8f\u540e\u7684\u6570\u7ec4\nfor (int i : arr) {\n    System.out.print(i + \" \");\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u65b9\u6cd5 2\uff1a\u4f7f\u7528 Comparator \u548c Arrays.sort() \u65b9\u6cd5<\/strong><\/p>\n<p>\u6b64\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u6839\u636e\u81ea\u5b9a\u4e49\u6bd4\u8f83\u51fd\u6570\u6392\u5e8f\u5bf9\u8c61\u6570\u7ec4\u7684\u60c5\u51b5\u3002\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u5b9e\u73b0 Comparator \u63a5\u53e3\u7684 Comparator \u7c7b\uff0c\u5176\u4e2d T \u662f\u8981\u6392\u5e8f\u5bf9\u8c61\u7684\u7c7b\u578b\u3002 <\/p>\n<pre>\/\/ \u521b\u5efa\u4e00\u4e2a\u81ea\u5b9a\u4e49\u6bd4\u8f83\u51fd\u6570\nComparator&lt;Integer&gt; comparator = new Comparator&lt;Integer&gt;() {\n    @Override\n    public int compare(Integer o1, Integer o2) {\n        return o2 - o1; \/\/ \u964d\u5e8f\u6392\u5e8f\n    }\n};\n\n\/\/ \u4f7f\u7528 Comparator \u548c Arrays.sort() \u65b9\u6cd5\u6392\u5e8f\u6570\u7ec4\nArrays.sort(arr, comparator);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u9009\u62e9\u6392\u5e8f\u65b9\u6cd5\u7684\u8003\u8651\u56e0\u7d20<\/strong><\/p>\n<ul>\n<li> <strong>\u6027\u80fd\uff1a<\/strong> \u5982\u679c\u6570\u7ec4\u8f83\u5927\uff0c\u5219 Arrays.sort() \u65b9\u6cd5\u901a\u5e38\u6bd4\u4f7f\u7528 Comparator \u7684\u65b9\u6cd5\u66f4\u5feb\u3002<\/li>\n<li> <strong>\u7075\u6d3b\u6027\uff1a<\/strong> \u5982\u679c\u9700\u8981\u6839\u636e\u81ea\u5b9a\u4e49\u6bd4\u8f83\u51fd\u6570\u6392\u5e8f\u6570\u7ec4\uff0c\u5219\u9700\u8981\u4f7f\u7528 Comparator\u3002<\/li>\n<li> <strong>\u5185\u5b58\u4f7f\u7528\uff1a<\/strong> \u4f7f\u7528 Comparator \u7684\u65b9\u6cd5\u53ef\u80fd\u9700\u8981\u6bd4 Arrays.sort() \u65b9\u6cd5\u66f4\u591a\u7684\u5185\u5b58\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u600e\u4e48\u7ed9\u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f\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>\u5728 java \u4e2d\u7ed9\u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a1. \u4f7f\u7528 arrays.sort() \u65b9\u6cd5\uff08\u65f6\u95f4\u590d\u6742\u5ea6 o(n log n)\uff09\uff1b2. \u4f7f\u7528 comparator \u548c arrays.sort() \u65b9\u6cd5\uff08\u9002\u7528\u4e8e\u81ea\u5b9a\u4e49\u6bd4\u8f83\u51fd\u6570\uff09\u3002\u6392\u5e8f\u65b9\u6cd5\u7684\u9009\u62e9\u53d6\u51b3\u4e8e\u6027\u80fd\u3001\u7075\u6d3b\u6027\u3001\u5185\u5b58\u4f7f\u7528\u7b49\u56e0\u7d20\u3002 Java \u4e2d\u7ed9\u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f \u5728 Java \u4e2d\uff0c\u7ed9\u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f\u6709\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a \u65b9\u6cd5 1\uff1a\u4f7f\u7528 Arrays.sort() \u65b9\u6cd5 Arrays.sort() \u65b9\u6cd5\u662f\u7ed9\u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f\u7684\u6700\u7b80\u5355\u65b9\u6cd5\u3002\u5b83\u4f7f\u7528\u5f52\u5e76\u6392\u5e8f\u7b97\u6cd5\uff0c\u8be5\u7b97\u6cd5\u5177\u6709 O(n log n) \u7684\u65f6\u95f4\u590d\u6742\u5ea6\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \/\/ \u521b\u5efa\u4e00\u4e2a Integer \u6570\u7ec4 Integer[] arr = {5, 2, 8, 3, 1, 7}; \/\/ \u4f7f\u7528 Arrays.sort() \u65b9\u6cd5\u6392\u5e8f\u6570\u7ec4 Arrays.sort(arr); \/\/ \u6253\u5370\u6392\u5e8f\u540e\u7684\u6570\u7ec4 for (int i : arr) [&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-37987","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37987","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=37987"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37987\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=37987"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=37987"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=37987"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}