{"id":37716,"date":"2024-11-26T09:31:54","date_gmt":"2024-11-26T01:31:54","guid":{"rendered":"https:\/\/fwq.ai\/blog\/37716\/"},"modified":"2024-11-26T09:31:54","modified_gmt":"2024-11-26T01:31:54","slug":"java%e4%b8%ad%e6%80%8e%e4%b9%88%e9%9a%8f%e6%9c%ba%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/37716\/","title":{"rendered":"java\u4e2d\u600e\u4e48\u968f\u673a\u6570\u7ec4"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u751f\u6210\u968f\u673a\u6570\u7ec4\u7684\u65b9\u6cd5\u6709\u4e09\u6b65\uff1a\u4f7f\u7528 math.random() \u4e58\u4ee5\u6570\u7ec4\u957f\u5ea6\u83b7\u53d6\u968f\u673a\u7d22\u5f15\uff1b\u4f7f\u7528\u968f\u673a\u6570\u751f\u6210\u5668 random \u7c7b\u751f\u6210\u6307\u5b9a\u8303\u56f4\u5185\u7684\u968f\u673a\u7d22\u5f15\uff1b\u4f7f\u7528 collections.shuffle() \u65b9\u6cd5\u968f\u673a\u6253\u4e71\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111309242030840.jpg\" class=\"aligncenter\" title=\"java\u4e2d\u600e\u4e48\u968f\u673a\u6570\u7ec4\u63d2\u56fe\" alt=\"java\u4e2d\u600e\u4e48\u968f\u673a\u6570\u7ec4\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u968f\u673a\u6570\u7ec4\u7684\u751f\u6210\u65b9\u6cd5<\/strong><\/p>\n<p><strong>1. \u4f7f\u7528 Math.random() \u65b9\u6cd5<\/strong><\/p>\n<p>Math.random() \u65b9\u6cd5\u751f\u6210 [0, 1) \u8303\u56f4\u5185\u7684\u5747\u5300\u5206\u5e03\u968f\u673a\u6570\u3002\u53ef\u4ee5\u5c06\u5176\u4e58\u4ee5\u6570\u7ec4\u957f\u5ea6\uff0c\u5f97\u5230 [0, \u6570\u7ec4\u957f\u5ea6) \u8303\u56f4\u5185\u7684\u968f\u673a\u6574\u6570\u7d22\u5f15\u3002\u4e0b\u9762\u7684\u4ee3\u7801\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528 Math.random() \u968f\u673a\u6253\u4e71\u4e00\u4e2a\u6570\u7ec4\uff1a<\/p>\n<pre>import java.util.Arrays;\n\npublic class RandomArray {\n\n    public static void main(String[] args) {\n        int[] arr = {1, 2, 3, 4, 5};\n\n        \/\/ \u751f\u6210\u968f\u673a\u7d22\u5f15\u5e76\u4ea4\u6362\u5143\u7d20\n        for (int i = 0; i &lt; arr.length; i++) {\n            int randomIndex = (int) (Math.random() * arr.length);\n            int temp = arr[i];\n            arr[i] = arr[randomIndex];\n            arr[randomIndex] = temp;\n        }\n\n        \/\/ \u8f93\u51fa\u968f\u673a\u5316\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\u968f\u673a\u6570\u751f\u6210\u5668<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>Java \u63d0\u4f9b\u4e86 Random \u7c7b\u7528\u4e8e\u751f\u6210\u5404\u79cd\u968f\u673a\u6570\u3002\u5b83\u6bd4 Math.random() \u65b9\u6cd5\u63d0\u4f9b\u4e86\u66f4\u4e30\u5bcc\u7684\u968f\u673a\u6570\u751f\u6210\u529f\u80fd\uff0c\u4f8b\u5982\u751f\u6210\u6307\u5b9a\u8303\u56f4\u5185\u7684\u968f\u673a\u6570\u3002\u4e0b\u9762\u7684\u4ee3\u7801\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528 Random \u7c7b\u968f\u673a\u6253\u4e71\u4e00\u4e2a\u6570\u7ec4\uff1a<\/p>\n<pre>import java.util.Arrays;\nimport java.util.Random;\n\npublic class RandomArray {\n\n    public static void main(String[] args) {\n        int[] arr = {1, 2, 3, 4, 5};\n        Random random = new Random();\n\n        \/\/ \u751f\u6210\u6307\u5b9a\u8303\u56f4\u5185\u7684\u968f\u673a\u7d22\u5f15\u5e76\u4ea4\u6362\u5143\u7d20\n        for (int i = 0; i &lt; arr.length; i++) {\n            int randomIndex = random.nextInt(arr.length);\n            int temp = arr[i];\n            arr[i] = arr[randomIndex];\n            arr[randomIndex] = temp;\n        }\n\n        \/\/ \u8f93\u51fa\u968f\u673a\u5316\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 Collections.shuffle() \u65b9\u6cd5<\/strong><\/p>\n<p>Java \u7684 Collections \u7c7b\u63d0\u4f9b\u4e86 shuffle() \u65b9\u6cd5\uff0c\u53ef\u4ee5\u5bf9\u5217\u8868\u6216\u6570\u7ec4\u8fdb\u884c\u968f\u673a\u6253\u4e71\u3002\u5b83\u4f7f\u7528 Fisher-Yates \u7b97\u6cd5\uff0c\u4fdd\u8bc1\u4e86\u968f\u673a\u7ed3\u679c\u7684\u516c\u5e73\u6027\u3002\u4e0b\u9762\u7684\u4ee3\u7801\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528 Collections.shuffle() \u65b9\u6cd5\u968f\u673a\u6253\u4e71\u4e00\u4e2a\u6570\u7ec4\uff1a<\/p>\n<pre>import java.util.Arrays;\nimport java.util.Collections;\n\npublic class RandomArray {\n\n    public static void main(String[] args) {\n        int[] arr = {1, 2, 3, 4, 5};\n\n        \/\/ \u968f\u673a\u5316\u6570\u7ec4\n        Collections.shuffle(Arrays.asList(arr));\n\n        \/\/ \u8f93\u51fa\u968f\u673a\u5316\u7684\u6570\u7ec4\n        System.out.println(Arrays.toString(arr));\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u600e\u4e48\u968f\u673a\u6570\u7ec4\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>java \u4e2d\u751f\u6210\u968f\u673a\u6570\u7ec4\u7684\u65b9\u6cd5\u6709\u4e09\u6b65\uff1a\u4f7f\u7528 math.random() \u4e58\u4ee5\u6570\u7ec4\u957f\u5ea6\u83b7\u53d6\u968f\u673a\u7d22\u5f15\uff1b\u4f7f\u7528\u968f\u673a\u6570\u751f\u6210\u5668 random \u7c7b\u751f\u6210\u6307\u5b9a\u8303\u56f4\u5185\u7684\u968f\u673a\u7d22\u5f15\uff1b\u4f7f\u7528 collections.shuffle() \u65b9\u6cd5\u968f\u673a\u6253\u4e71\u6570\u7ec4\u3002 Java \u4e2d\u968f\u673a\u6570\u7ec4\u7684\u751f\u6210\u65b9\u6cd5 1. \u4f7f\u7528 Math.random() \u65b9\u6cd5 Math.random() \u65b9\u6cd5\u751f\u6210 [0, 1) \u8303\u56f4\u5185\u7684\u5747\u5300\u5206\u5e03\u968f\u673a\u6570\u3002\u53ef\u4ee5\u5c06\u5176\u4e58\u4ee5\u6570\u7ec4\u957f\u5ea6\uff0c\u5f97\u5230 [0, \u6570\u7ec4\u957f\u5ea6) \u8303\u56f4\u5185\u7684\u968f\u673a\u6574\u6570\u7d22\u5f15\u3002\u4e0b\u9762\u7684\u4ee3\u7801\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528 Math.random() \u968f\u673a\u6253\u4e71\u4e00\u4e2a\u6570\u7ec4\uff1a import java.util.Arrays; public class RandomArray { public static void main(String[] args) { int[] arr = {1, 2, 3, 4, 5}; \/\/ \u751f\u6210\u968f\u673a\u7d22\u5f15\u5e76\u4ea4\u6362\u5143\u7d20 for (int i = 0; i &lt; arr.length; i++) [&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-37716","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37716","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=37716"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37716\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=37716"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=37716"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=37716"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}