{"id":66869,"date":"2025-05-03T12:35:53","date_gmt":"2025-05-03T04:35:53","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66869\/"},"modified":"2025-05-03T12:35:53","modified_gmt":"2025-05-03T04:35:53","slug":"java%e6%80%8e%e4%b9%88%e4%bb%8e%e6%95%b0%e7%bb%84%e4%b8%ad%e4%ba%a7%e7%94%9f%e9%9a%8f%e6%9c%ba%e6%95%b0-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66869\/","title":{"rendered":"java\u600e\u4e48\u4ece\u6570\u7ec4\u4e2d\u4ea7\u751f\u968f\u673a\u6570"},"content":{"rendered":"

\n \u4ece java \u6570\u7ec4\u4e2d\u4ea7\u751f\u968f\u673a\u6570\u7684\u65b9\u6cd5\u6709\u4e24\u79cd\uff1a\u4f7f\u7528 math.random() \u548c\u6a21\u8fd0\u7b97\uff0c\u751f\u6210\u4e00\u4e2a\u4ecb\u4e8e 0 \u5230\u6570\u7ec4\u957f\u5ea6\u4e4b\u95f4\u7684\u6d6e\u70b9\u6570\uff0c\u5e76\u5bf9\u5176\u53d6\u6574\u4f5c\u4e3a\u7d22\u5f15\u3002\u4f7f\u7528 random \u7c7b\uff0c\u521b\u5efa\u4e00\u4e2a random \u5bf9\u8c61\u5e76\u8c03\u7528nextint(int bound) \u65b9\u6cd5\uff0c\u5176\u4e2d bound \u662f\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u8fd4\u56de\u7684\u968f\u673a\u6574\u6570\u76f4\u63a5\u4f5c\u4e3a\u7d22\u5f15\u3002\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u4ece\u6570\u7ec4\u4e2d\u4ea7\u751f\u968f\u673a\u6570\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u4ece Java \u6570\u7ec4\u4e2d\u4ea7\u751f\u968f\u673a\u6570<\/strong><\/p>\n

\u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528 Math.random() \u548c\u6a21\u8fd0\u7b97<\/strong><\/p>\n

\u6b65\u9aa4\uff1a<\/strong><\/p>\n

    \n
  1. \u4f7f\u7528 Math.random() \u751f\u6210\u4e00\u4e2a 0 \u5230 1 \u4e4b\u95f4\u7684\u5c0f\u6570\u3002<\/li>\n
  2. \u5c06\u8fd9\u4e2a\u5c0f\u6570\u4e58\u4ee5\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5f97\u5230\u4e00\u4e2a\u4ecb\u4e8e 0 \u5230\u6570\u7ec4\u957f\u5ea6\u4e4b\u95f4\u7684\u6d6e\u70b9\u6570\u3002<\/li>\n
  3. \u5bf9\u8fd9\u4e2a\u6d6e\u70b9\u6570\u8fdb\u884c\u6c42\u6574\uff0c\u5f97\u5230\u4e00\u4e2a\u6574\u6570\u7d22\u5f15\u3002<\/li>\n
  4. \u4f7f\u7528\u8fd9\u4e2a\u7d22\u5f15\u8bbf\u95ee\u6570\u7ec4\uff0c\u5f97\u5230\u968f\u673a\u5143\u7d20\u3002<\/li>\n<\/ol>\n

    Java \u4ee3\u7801\uff1a<\/strong><\/p>\n

    \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

    int[] array = {1, 2, 3, 4, 5};\nint randomIndex = (int) (Math.random() * array.length);\nint randomElement = array[randomIndex];<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u65b9\u6cd5\u4e8c\uff1a\u4f7f\u7528 Random \u7c7b<\/strong><\/p>\n
    \u6b65\u9aa4\uff1a<\/strong><\/p>\n
      \n
    1. \u521b\u5efa\u4e00\u4e2a Random \u5bf9\u8c61\u3002<\/li>\n
    2. \u8c03\u7528 nextInt(int bound) \u65b9\u6cd5\uff0c\u5176\u4e2d bound \u662f\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/li>\n
    3. \u8fd9\u4e2a\u65b9\u6cd5\u5c06\u8fd4\u56de\u4e00\u4e2a\u4ecb\u4e8e 0 \u5230 bound-1 \u4e4b\u95f4\u7684\u968f\u673a\u6574\u6570\u3002<\/li>\n
    4. \u4f7f\u7528\u8fd9\u4e2a\u7d22\u5f15\u8bbf\u95ee\u6570\u7ec4\uff0c\u5f97\u5230\u968f\u673a\u5143\u7d20\u3002<\/li>\n<\/ol>\n
      Java \u4ee3\u7801\uff1a<\/strong><\/p>\n
      \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
      int[] array = {1, 2, 3, 4, 5};\nRandom random = new Random();\nint randomIndex = random.nextInt(array.length);\nint randomElement = array[randomIndex];<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u4ece\u6570\u7ec4\u4e2d\u4ea7\u751f\u968f\u673a\u6570\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u4ece java \u6570\u7ec4\u4e2d\u4ea7\u751f\u968f\u673a\u6570\u7684\u65b9\u6cd5\u6709\u4e24\u79cd\uff1a\u4f7f\u7528 math.random() \u548c\u6a21\u8fd0\u7b97\uff0c\u751f\u6210\u4e00\u4e2a\u4ecb\u4e8e 0 \u5230\u6570\u7ec4\u957f\u5ea6\u4e4b\u95f4\u7684\u6d6e\u70b9\u6570\uff0c\u5e76\u5bf9\u5176\u53d6\u6574\u4f5c\u4e3a\u7d22\u5f15\u3002\u4f7f\u7528 random \u7c7b\uff0c\u521b\u5efa\u4e00\u4e2a random \u5bf9\u8c61\u5e76\u8c03\u7528nextint(int bound) \u65b9\u6cd5\uff0c\u5176\u4e2d bound \u662f\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u8fd4\u56de\u7684\u968f\u673a\u6574\u6570\u76f4\u63a5\u4f5c\u4e3a\u7d22\u5f15\u3002 \u5982\u4f55\u4ece Java \u6570\u7ec4\u4e2d\u4ea7\u751f\u968f\u673a\u6570 \u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528 Math.random() \u548c\u6a21\u8fd0\u7b97 \u6b65\u9aa4\uff1a \u4f7f\u7528 Math.random() \u751f\u6210\u4e00\u4e2a 0 \u5230 1 \u4e4b\u95f4\u7684\u5c0f\u6570\u3002 \u5c06\u8fd9\u4e2a\u5c0f\u6570\u4e58\u4ee5\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5f97\u5230\u4e00\u4e2a\u4ecb\u4e8e 0 \u5230\u6570\u7ec4\u957f\u5ea6\u4e4b\u95f4\u7684\u6d6e\u70b9\u6570\u3002 \u5bf9\u8fd9\u4e2a\u6d6e\u70b9\u6570\u8fdb\u884c\u6c42\u6574\uff0c\u5f97\u5230\u4e00\u4e2a\u6574\u6570\u7d22\u5f15\u3002 \u4f7f\u7528\u8fd9\u4e2a\u7d22\u5f15\u8bbf\u95ee\u6570\u7ec4\uff0c\u5f97\u5230\u968f\u673a\u5143\u7d20\u3002 Java \u4ee3\u7801\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] array = {1, 2, 3, 4, 5}; int randomIndex = (int) (Math.random() * array.length); int randomElement = […]<\/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-66869","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66869","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=66869"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66869\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66869"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66869"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66869"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}