{"id":39429,"date":"2024-11-26T08:57:48","date_gmt":"2024-11-26T00:57:48","guid":{"rendered":"https:\/\/fwq.ai\/blog\/39429\/"},"modified":"2024-11-26T08:57:48","modified_gmt":"2024-11-26T00:57:48","slug":"java%e6%80%8e%e4%b9%88%e5%ae%9e%e7%8e%b0%e6%95%b0%e7%bb%84%e5%85%83%e7%b4%a0%e7%9a%84%e6%8e%92%e5%ba%8fcsdn","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/39429\/","title":{"rendered":"java\u600e\u4e48\u5b9e\u73b0\u6570\u7ec4\u5143\u7d20\u7684\u6392\u5e8fcsdn"},"content":{"rendered":"

\n \u5728 java \u4e2d\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u6709\u4ee5\u4e0b\u65b9\u6cd5\uff1a\u4f7f\u7528 arrays.sort() \u65b9\u6cd5\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f\u3002\u521b\u5efa\u81ea\u5b9a\u4e49 comparator \u5b9e\u73b0\u5e76\u4f7f\u7528 arrays.sort() \u65b9\u6cd5\u8fdb\u884c\u81ea\u5b9a\u4e49\u6392\u5e8f\u3002\u4e0d\u540c\u6392\u5e8f\u7b97\u6cd5\u7684\u590d\u6742\u5ea6\u5404\u4e0d\u76f8\u540c\uff0c\u6839\u636e\u6570\u636e\u89c4\u6a21\u548c\u6240\u9700\u7684\u6392\u5e8f\u901f\u5ea6\u9009\u62e9\u5408\u9002\u7684\u7b97\u6cd5\u66f4\u4e3a\u9ad8\u6548\u3002\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u5b9e\u73b0\u6570\u7ec4\u5143\u7d20\u7684\u6392\u5e8fcsdn\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u5728 Java \u4e2d\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u6392\u5e8f<\/strong><\/p>\n

\u4ee5\u4e0b\u662f\u5982\u4f55\u5728 Java \u4e2d\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u7684\u65b9\u6cd5\uff1a<\/p>\n

1. \u4f7f\u7528\u6570\u7ec4\u7684 sort() \u65b9\u6cd5<\/strong><\/p>\n

int[] arr = { 5, 2, 8, 3, 1 };\nArrays.sort(arr);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8be5\u65b9\u6cd5\u5c06\u4f7f\u7528\u5feb\u901f\u6392\u5e8f\u7b97\u6cd5\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u5347\u5e8f\u3002<\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
2. \u4f7f\u7528\u81ea\u5b9a\u4e49\u6392\u5e8f\u65b9\u6cd5<\/strong><\/p>\n
import java.util.Comparator;\n\nclass MyComparator implements Comparator<Integer> {\n  @Override\n  public int compare(Integer a, Integer b) {\n    return b - a; \/\/ \u964d\u5e8f\u6392\u5217\n  }\n}\n\nint[] arr = { 5, 2, 8, 3, 1 };\nArrays.sort(arr, new MyComparator());<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u60a8\u53ef\u4ee5\u521b\u5efa\u81ea\u5df1\u7684 Comparator \u5b9e\u73b0\uff0c\u8be5\u5b9e\u73b0\u5b9a\u4e49\u4e86\u7528\u4e8e\u6bd4\u8f83\u5143\u7d20\u7684\u89c4\u5219\u3002<\/p>\n
\u6392\u5e8f\u7b97\u6cd5\u7684\u590d\u6742\u5ea6<\/strong><\/p>\n
\u4e0d\u540c\u6392\u5e8f\u7b97\u6cd5\u7684\u590d\u6742\u5ea6\u4e0d\u540c\uff1a<\/p>\n
    \n
  •  \u5feb\u901f\u6392\u5e8f\uff1a<\/strong>O(n log n)\uff08\u5e73\u5747\u60c5\u51b5\u4e0b\uff09<\/li>\n
  •  \uff1a<\/strong>O(n^2)<\/li>\n
  •  \u63d2\u5165\u6392\u5e8f\uff1a<\/strong>O(n^2)\uff08\u6700\u574f\u60c5\u51b5\u4e0b\uff09<\/li>\n
  •  \u5f52\u5e76\u6392\u5e8f\uff1a<\/strong>O(n log n)<\/li>\n
  •  \u5806\u6392\u5e8f\uff1a<\/strong>O(n log n)<\/li>\n<\/ul>\n
    \u9009\u62e9\u5408\u9002\u7684\u6392\u5e8f\u7b97\u6cd5<\/strong><\/p>\n
    \u9009\u62e9\u5408\u9002\u7684\u6392\u5e8f\u7b97\u6cd5\u53d6\u51b3\u4e8e\u6570\u636e\u89c4\u6a21\u548c\u6240\u9700\u7684\u6392\u5e8f\u901f\u5ea6\u3002\u5bf9\u4e8e\u8f83\u5c0f\u89c4\u6a21\u7684\u6570\u636e\u96c6\uff0c\u5192\u6ce1\u6392\u5e8f\u6216\u63d2\u5165\u6392\u5e8f\u53ef\u80fd\u5c31\u8db3\u591f\u4e86\u3002\u5bf9\u4e8e\u8f83\u5927\u7684\u6570\u636e\u96c6\uff0c\u5feb\u901f\u6392\u5e8f\u6216\u5f52\u5e76\u6392\u5e8f\u7b49\u66f4\u6709\u6548\u7684\u7b97\u6cd5\u53ef\u80fd\u662f\u66f4\u597d\u7684\u9009\u62e9\u3002<\/p>\n
    \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5b9e\u73b0\u6570\u7ec4\u5143\u7d20\u7684\u6392\u5e8fcsdn\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":"
    \u5728 java \u4e2d\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u6709\u4ee5\u4e0b\u65b9\u6cd5\uff1a\u4f7f\u7528 arrays.sort() \u65b9\u6cd5\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f\u3002\u521b\u5efa\u81ea\u5b9a\u4e49 comparator \u5b9e\u73b0\u5e76\u4f7f\u7528 arrays.sort() \u65b9\u6cd5\u8fdb\u884c\u81ea\u5b9a\u4e49\u6392\u5e8f\u3002\u4e0d\u540c\u6392\u5e8f\u7b97\u6cd5\u7684\u590d\u6742\u5ea6\u5404\u4e0d\u76f8\u540c\uff0c\u6839\u636e\u6570\u636e\u89c4\u6a21\u548c\u6240\u9700\u7684\u6392\u5e8f\u901f\u5ea6\u9009\u62e9\u5408\u9002\u7684\u7b97\u6cd5\u66f4\u4e3a\u9ad8\u6548\u3002 \u5982\u4f55\u5728 Java \u4e2d\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u6392\u5e8f \u4ee5\u4e0b\u662f\u5982\u4f55\u5728 Java \u4e2d\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u7684\u65b9\u6cd5\uff1a 1. \u4f7f\u7528\u6570\u7ec4\u7684 sort() \u65b9\u6cd5 int[] arr = { 5, 2, 8, 3, 1 }; Arrays.sort(arr); \u767b\u5f55\u540e\u590d\u5236 \u8be5\u65b9\u6cd5\u5c06\u4f7f\u7528\u5feb\u901f\u6392\u5e8f\u7b97\u6cd5\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u5347\u5e8f\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b 2. \u4f7f\u7528\u81ea\u5b9a\u4e49\u6392\u5e8f\u65b9\u6cd5 import java.util.Comparator; class MyComparator implements Comparator<Integer> { @Override public int compare(Integer a, Integer b) { return b – a; \/\/ […]<\/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-39429","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39429","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=39429"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39429\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=39429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=39429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=39429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}