{"id":35499,"date":"2024-11-26T12:33:14","date_gmt":"2024-11-26T04:33:14","guid":{"rendered":"https:\/\/fwq.ai\/blog\/35499\/"},"modified":"2024-11-26T12:33:14","modified_gmt":"2024-11-26T04:33:14","slug":"java%e6%80%8e%e4%b9%88%e9%9a%8f%e6%9c%ba%e7%94%9f%e6%88%90%e6%95%b0%e7%bb%84%e5%86%85%e7%9a%84%e6%95%b0","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/35499\/","title":{"rendered":"java\u600e\u4e48\u968f\u673a\u751f\u6210\u6570\u7ec4\u5185\u7684\u6570"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7 math.random() \u65b9\u6cd5\u548c\u6570\u7ec4\u957f\u5ea6\u751f\u6210\u6570\u7ec4\u5185\u968f\u673a\u5143\u7d20\uff1a\u751f\u6210\u4e00\u4e2a\u968f\u673a\u7d22\u5f15\uff1aint randomindex = (int) (math.random() * arraylength);\u83b7\u53d6\u6570\u7ec4\u4e2d\u968f\u673a\u5143\u7d20\uff1aint randomelement = array[randomindex];\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/04\/2024110404244490999.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u968f\u673a\u751f\u6210\u6570\u7ec4\u5185\u7684\u6570\u63d2\u56fe\" alt=\"java\u600e\u4e48\u968f\u673a\u751f\u6210\u6570\u7ec4\u5185\u7684\u6570\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u968f\u673a\u6570\u7ec4\u5143\u7d20\u751f\u6210<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 Math.random() \u65b9\u6cd5\u548c\u6570\u7ec4\u957f\u5ea6\u968f\u673a\u751f\u6210\u6570\u7ec4\u5185\u7684\u6570\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n<p><strong>1. \u751f\u6210\u4e00\u4e2a\u968f\u673a\u7d22\u5f15<\/strong><\/p>\n<pre>int randomIndex = (int) (Math.random() * arrayLength);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5728\u8fd9\u91cc\uff0carrayLength \u662f\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p><strong>2. \u83b7\u53d6\u6570\u7ec4\u4e2d\u7684\u5143\u7d20<\/strong><\/p>\n<p>\u4f7f\u7528\u751f\u6210\u7684\u968f\u673a\u7d22\u5f15\u4ece\u6570\u7ec4\u4e2d\u83b7\u53d6\u5143\u7d20\uff1a<\/p>\n<pre>int randomElement = array[randomIndex];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u793a\u4f8b\u4ee3\u7801<\/strong><\/p>\n<p>\u4ee5\u4e0b\u793a\u4f8b\u4ee3\u7801\u6f14\u793a\u4e86\u5982\u4f55\u751f\u6210\u6570\u7ec4\u4e2d\u4e00\u4e2a\u968f\u673a\u6570\uff1a<\/p>\n<pre>int[] array = {1, 2, 3, 4, 5};\nint randomIndex = (int) (Math.random() * array.length);\nint randomElement = array[randomIndex];\nSystem.out.println(\"\u968f\u673a\u6570\uff1a\" + randomElement);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6ce8\u610f<\/strong><\/p>\n<ul>\n<li>Math.random() \u65b9\u6cd5\u751f\u6210\u4ecb\u4e8e 0.0 \u548c 1.0 \u4e4b\u95f4\u7684\u4f2a\u968f\u673a\u6570\u3002<\/li>\n<li>\u5c06\u7ed3\u679c\u5f3a\u5236\u8f6c\u6362\u4e3a int \u7c7b\u578b\uff0c\u4ee5\u83b7\u5f97\u6570\u7ec4\u7d22\u5f15\u3002<\/li>\n<li>\u8be5\u65b9\u6cd5\u53ef\u4ee5\u751f\u6210\u6570\u7ec4\u5185\u6240\u6709\u5143\u7d20\u7684\u968f\u673a\u6570\uff0c\u5305\u62ec\u91cd\u590d\u7684\u5143\u7d20\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u968f\u673a\u751f\u6210\u6570\u7ec4\u5185\u7684\u6570\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\uff0c\u53ef\u4ee5\u901a\u8fc7 math.random() \u65b9\u6cd5\u548c\u6570\u7ec4\u957f\u5ea6\u751f\u6210\u6570\u7ec4\u5185\u968f\u673a\u5143\u7d20\uff1a\u751f\u6210\u4e00\u4e2a\u968f\u673a\u7d22\u5f15\uff1aint randomindex = (int) (math.random() * arraylength);\u83b7\u53d6\u6570\u7ec4\u4e2d\u968f\u673a\u5143\u7d20\uff1aint randomelement = array[randomindex]; Java \u4e2d\u968f\u673a\u6570\u7ec4\u5143\u7d20\u751f\u6210 \u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 Math.random() \u65b9\u6cd5\u548c\u6570\u7ec4\u957f\u5ea6\u968f\u673a\u751f\u6210\u6570\u7ec4\u5185\u7684\u6570\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a 1. \u751f\u6210\u4e00\u4e2a\u968f\u673a\u7d22\u5f15 int randomIndex = (int) (Math.random() * arrayLength); \u767b\u5f55\u540e\u590d\u5236 \u5728\u8fd9\u91cc\uff0carrayLength \u662f\u6570\u7ec4\u7684\u957f\u5ea6\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b 2. \u83b7\u53d6\u6570\u7ec4\u4e2d\u7684\u5143\u7d20 \u4f7f\u7528\u751f\u6210\u7684\u968f\u673a\u7d22\u5f15\u4ece\u6570\u7ec4\u4e2d\u83b7\u53d6\u5143\u7d20\uff1a int randomElement = array[randomIndex]; \u767b\u5f55\u540e\u590d\u5236 \u793a\u4f8b\u4ee3\u7801 \u4ee5\u4e0b\u793a\u4f8b\u4ee3\u7801\u6f14\u793a\u4e86\u5982\u4f55\u751f\u6210\u6570\u7ec4\u4e2d\u4e00\u4e2a\u968f\u673a\u6570\uff1a int[] array = {1, 2, 3, 4, 5}; int randomIndex = [&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-35499","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/35499","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=35499"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/35499\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=35499"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=35499"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=35499"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}