{"id":65656,"date":"2025-05-03T16:20:05","date_gmt":"2025-05-03T08:20:05","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65656\/"},"modified":"2025-05-03T16:20:05","modified_gmt":"2025-05-03T08:20:05","slug":"java%e4%b8%ad%e6%95%b0%e7%bb%84%e5%85%83%e7%b4%a0%e6%80%8e%e4%b9%88%e6%8e%92%e5%ba%8f-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65656\/","title":{"rendered":"java\u4e2d\u6570\u7ec4\u5143\u7d20\u600e\u4e48\u6392\u5e8f"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u63d0\u4f9b\u4e24\u79cd\u4e3b\u8981\u6570\u7ec4\u5143\u7d20\u6392\u5e8f\u65b9\u6cd5\uff1aarrays.sort()\uff1a\u7528\u4e8e\u5bf9\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\u548c\u5bf9\u8c61\u6570\u7ec4\uff08\u987b\u5b9e\u73b0 comparable \u63a5\u53e3\uff09\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f\u3002comparator.comparing()\uff1a\u57fa\u4e8e lambda \u8868\u8fbe\u5f0f\uff0c\u5141\u8bb8\u6839\u636e\u81ea\u5b9a\u4e49\u6bd4\u8f83\u5668\u5bf9\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111306334262913.jpg\" class=\"aligncenter\" title=\"java\u4e2d\u6570\u7ec4\u5143\u7d20\u600e\u4e48\u6392\u5e8f\u63d2\u56fe\" alt=\"java\u4e2d\u6570\u7ec4\u5143\u7d20\u600e\u4e48\u6392\u5e8f\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u6570\u7ec4\u5143\u7d20\u6392\u5e8f<\/strong><\/p>\n<p><strong>\u6392\u5e8f\u65b9\u6cd5<\/strong><\/p>\n<p>Java \u4e2d\u63d0\u4f9b\u4e86\u591a\u79cd\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u7684\u65b9\u6cd5\uff0c\u6700\u5e38\u7528\u7684\u6709\u4e24\u79cd\uff1a<\/p>\n<p><strong>1. Arrays.sort() \u65b9\u6cd5<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<ul>\n<li>\u5185\u7f6e\u65b9\u6cd5\uff0c\u7528\u4e8e\u5bf9\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff08int[]\u3001float[] \u7b49\uff09\u548c\u5bf9\u8c61\u6570\u7ec4\uff08Object[]\uff09\u8fdb\u884c\u6392\u5e8f\u3002<\/li>\n<li>\u6839\u636e\u5143\u7d20\u7684\u81ea\u7136\u987a\u5e8f\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f\u3002<\/li>\n<li>\u5bf9\u8c61\u6570\u7ec4\u5fc5\u987b\u5b9e\u73b0 Comparable \u63a5\u53e3\u624d\u80fd\u4f7f\u7528 Arrays.sort() \u65b9\u6cd5\u3002<\/li>\n<li>\u8bed\u6cd5\uff1aArrays.sort(arrayName)<\/li>\n<\/ul>\n<p><strong>2. Comparator.comparing() \u65b9\u6cd5<\/strong><\/p>\n<ul>\n<li>\u57fa\u4e8e Lambda \u8868\u8fbe\u5f0f\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u65b9\u5f0f\uff0c\u9002\u7528\u4e8e\u5bf9\u81ea\u5b9a\u4e49\u7c7b\u6216\u5bf9\u8c61\u7684\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f\u3002<\/li>\n<li>\u5141\u8bb8\u6839\u636e\u4efb\u610f\u6bd4\u8f83\u5668\u5bf9\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u3002<\/li>\n<li>\u8bed\u6cd5\uff1aArrays.sort(arrayName, Comparator.comparing(Function keyExtractor)) <\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b<\/strong><\/p>\n<p><strong>\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\u6392\u5e8f<\/strong><\/p>\n<pre>int[] intArray = {3, 1, 5, 2, 4};\nArrays.sort(intArray); \/\/ \u4f7f\u7528 Arrays.sort() \u65b9\u6cd5\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f<\/strong><\/p>\n<p>\u5047\u8bbe\u6709\u4e00\u4e2a Student \u7c7b\uff0c\u5176\u4e2d\u5305\u542b name \u548c age \u4e24\u4e2a\u5c5e\u6027\uff1a<\/p>\n<pre>class Student implements Comparable&lt;Student&gt; {\n    private String name;\n    private int age;\n\n    @Override\n    public int compareTo(Student other) {\n        return this.name.compareTo(other.name); \/\/ \u6839\u636e\u59d3\u540d\u5347\u5e8f\u6392\u5e8f\n    }\n}\n\nStudent[] students = new Student[3];\nstudents[0] = new Student(\"Tom\", 20);\nstudents[1] = new Student(\"Alice\", 21);\nstudents[2] = new Student(\"Bob\", 19);\n\nArrays.sort(students); \/\/ \u4f7f\u7528 Comparable \u63a5\u53e3\u5b9e\u73b0\u7684 compareTo() \u65b9\u6cd5\u8fdb\u884c\u6392\u5e8f<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u57fa\u4e8e Comparator \u7684\u6392\u5e8f<\/strong><\/p>\n<p>\u5047\u8bbe\u8981\u6839\u636e\u5b66\u751f\u7684\u5e74\u9f84\u964d\u5e8f\u6392\u5e8f\uff1a<\/p>\n<pre>Arrays.sort(students, Comparator.comparing(Student::getAge).reversed());<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u63d0\u793a<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528 Arrays.sort() \u65b9\u6cd5\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u6570\u7ec4\u5143\u7d20\u7684\u6570\u636e\u7c7b\u578b\u3002<\/li>\n<li>Comparator.comparing() \u65b9\u6cd5\u63d0\u4f9b\u4e86\u4e00\u79cd\u7075\u6d3b\u7684\u65b9\u5f0f\u6765\u6307\u5b9a\u6392\u5e8f\u89c4\u5219\u3002<\/li>\n<li>\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u6392\u5e8f\u65b9\u6cd5\uff0c\u4ee5\u63d0\u9ad8\u6548\u7387\u548c\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u6570\u7ec4\u5143\u7d20\u600e\u4e48\u6392\u5e8f\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>java \u4e2d\u63d0\u4f9b\u4e24\u79cd\u4e3b\u8981\u6570\u7ec4\u5143\u7d20\u6392\u5e8f\u65b9\u6cd5\uff1aarrays.sort()\uff1a\u7528\u4e8e\u5bf9\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\u548c\u5bf9\u8c61\u6570\u7ec4\uff08\u987b\u5b9e\u73b0 comparable \u63a5\u53e3\uff09\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f\u3002comparator.comparing()\uff1a\u57fa\u4e8e lambda \u8868\u8fbe\u5f0f\uff0c\u5141\u8bb8\u6839\u636e\u81ea\u5b9a\u4e49\u6bd4\u8f83\u5668\u5bf9\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f\u3002 Java \u4e2d\u6570\u7ec4\u5143\u7d20\u6392\u5e8f \u6392\u5e8f\u65b9\u6cd5 Java \u4e2d\u63d0\u4f9b\u4e86\u591a\u79cd\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u7684\u65b9\u6cd5\uff0c\u6700\u5e38\u7528\u7684\u6709\u4e24\u79cd\uff1a 1. Arrays.sort() \u65b9\u6cd5 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u5185\u7f6e\u65b9\u6cd5\uff0c\u7528\u4e8e\u5bf9\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff08int[]\u3001float[] \u7b49\uff09\u548c\u5bf9\u8c61\u6570\u7ec4\uff08Object[]\uff09\u8fdb\u884c\u6392\u5e8f\u3002 \u6839\u636e\u5143\u7d20\u7684\u81ea\u7136\u987a\u5e8f\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f\u3002 \u5bf9\u8c61\u6570\u7ec4\u5fc5\u987b\u5b9e\u73b0 Comparable \u63a5\u53e3\u624d\u80fd\u4f7f\u7528 Arrays.sort() \u65b9\u6cd5\u3002 \u8bed\u6cd5\uff1aArrays.sort(arrayName) 2. Comparator.comparing() \u65b9\u6cd5 \u57fa\u4e8e Lambda \u8868\u8fbe\u5f0f\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u65b9\u5f0f\uff0c\u9002\u7528\u4e8e\u5bf9\u81ea\u5b9a\u4e49\u7c7b\u6216\u5bf9\u8c61\u7684\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f\u3002 \u5141\u8bb8\u6839\u636e\u4efb\u610f\u6bd4\u8f83\u5668\u5bf9\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u3002 \u8bed\u6cd5\uff1aArrays.sort(arrayName, Comparator.comparing(Function keyExtractor)) \u793a\u4f8b \u57fa\u672c\u7c7b\u578b\u6570\u7ec4\u6392\u5e8f int[] intArray = {3, 1, 5, 2, 4}; Arrays.sort(intArray); \/\/ \u4f7f\u7528 Arrays.sort() \u65b9\u6cd5\u8fdb\u884c\u5347\u5e8f\u6392\u5e8f \u767b\u5f55\u540e\u590d\u5236 \u5bf9\u8c61\u6570\u7ec4\u6392\u5e8f \u5047\u8bbe\u6709\u4e00\u4e2a Student \u7c7b\uff0c\u5176\u4e2d\u5305\u542b name [&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-65656","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65656","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=65656"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65656\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65656"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65656"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}