{"id":16942,"date":"2024-03-16T05:29:31","date_gmt":"2024-03-15T20:29:31","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e6%95%b0%e3%81%ae%e3%82%b3%e3%83%bc%e3%83%89%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e6%9b%b8%e3%81%91%e3%81%b0%e3%81%84%e3%81%84\/"},"modified":"2025-08-06T09:31:49","modified_gmt":"2025-08-06T00:31:49","slug":"java%e3%81%ae%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e6%95%b0%e3%81%ae%e3%82%b3%e3%83%bc%e3%83%89%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e6%9b%b8%e3%81%91%e3%81%b0%e3%81%84%e3%81%84","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e6%95%b0%e3%81%ae%e3%82%b3%e3%83%bc%e3%83%89%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e6%9b%b8%e3%81%91%e3%81%b0%e3%81%84%e3%81%84\/","title":{"rendered":"Java\u306e\u30e9\u30f3\u30c0\u30e0\u6570\u306e\u30b3\u30fc\u30c9\u306f\u3069\u306e\u3088\u3046\u306b\u66f8\u3051\u3070\u3044\u3044\u3067\u3059\u304b\u3002"},"content":{"rendered":"<p>Java\u3067\u30e9\u30f3\u30c0\u30e0\u306a\u6570\u3092\u751f\u6210\u3059\u308b\u306b\u306f\u3001Random\u30af\u30e9\u30b9\u3084Math\u30af\u30e9\u30b9\u306erandom()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u4e00\u822c\u7684\u306a2\u3064\u306e\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n<ol>\n<li>Random\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.util.Random;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">RandomNumber<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> {\r\n        <span class=\"hljs-comment\">\/\/ \u521b\u5efa\u4e00\u4e2aRandom\u5bf9\u8c61<\/span>\r\n        <span class=\"hljs-type\">Random<\/span> <span class=\"hljs-variable\">random<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Random<\/span>();\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u751f\u6210\u4e00\u4e2a\u968f\u673a\u6574\u6570<\/span>\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">randomNumber<\/span> <span class=\"hljs-operator\">=<\/span> random.nextInt();\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u751f\u6210\u4e00\u4e2a\u6307\u5b9a\u8303\u56f4\u7684\u968f\u673a\u6574\u6570<\/span>\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">randomNumberInRange<\/span> <span class=\"hljs-operator\">=<\/span> random.nextInt(<span class=\"hljs-number\">100<\/span>); <span class=\"hljs-comment\">\/\/ \u751f\u62100\u523099\u4e4b\u95f4\u7684\u968f\u673a\u6574\u6570<\/span>\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u751f\u6210\u4e00\u4e2a\u968f\u673a\u6d6e\u70b9\u6570<\/span>\r\n        <span class=\"hljs-type\">double<\/span> <span class=\"hljs-variable\">randomDouble<\/span> <span class=\"hljs-operator\">=<\/span> random.nextDouble();\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u8f93\u51fa\u7ed3\u679c<\/span>\r\n        System.out.println(<span class=\"hljs-string\">\"\u968f\u673a\u6574\u6570: \"<\/span> + randomNumber);\r\n        System.out.println(<span class=\"hljs-string\">\"\u6307\u5b9a\u8303\u56f4\u7684\u968f\u673a\u6574\u6570: \"<\/span> + randomNumberInRange);\r\n        System.out.println(<span class=\"hljs-string\">\"\u968f\u673a\u6d6e\u70b9\u6570: \"<\/span> + randomDouble);\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>Math\u30af\u30e9\u30b9\u306erandom()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">RandomNumber<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> {\r\n        <span class=\"hljs-comment\">\/\/ \u751f\u6210\u4e00\u4e2a\u968f\u673a\u6d6e\u70b9\u6570<\/span>\r\n        <span class=\"hljs-type\">double<\/span> <span class=\"hljs-variable\">randomDouble<\/span> <span class=\"hljs-operator\">=<\/span> Math.random();\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u751f\u6210\u4e00\u4e2a\u6307\u5b9a\u8303\u56f4\u7684\u968f\u673a\u6574\u6570<\/span>\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">randomNumberInRange<\/span> <span class=\"hljs-operator\">=<\/span> (<span class=\"hljs-type\">int<\/span>) (Math.random() * <span class=\"hljs-number\">100<\/span>); <span class=\"hljs-comment\">\/\/ \u751f\u62100\u523099\u4e4b\u95f4\u7684\u968f\u673a\u6574\u6570<\/span>\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u8f93\u51fa\u7ed3\u679c<\/span>\r\n        System.out.println(<span class=\"hljs-string\">\"\u968f\u673a\u6d6e\u70b9\u6570: \"<\/span> + randomDouble);\r\n        System.out.println(<span class=\"hljs-string\">\"\u6307\u5b9a\u8303\u56f4\u7684\u968f\u673a\u6574\u6570: \"<\/span> + randomNumberInRange);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u6ce8\u610f\uff1a\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306f\u5358\u7d14\u306a\u4f8b\u3067\u3059\u306e\u3067\u3001\u5b9f\u969b\u306e\u9069\u7528\u306b\u306f\u5177\u4f53\u7684\u306a\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u4fee\u6b63\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u30e9\u30f3\u30c0\u30e0\u306a\u6570\u3092\u751f\u6210\u3059\u308b\u306b\u306f\u3001Random\u30af\u30e9\u30b9\u3084Math\u30af\u30e9\u30b9\u306erandom()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u4e00\u822c\u7684\u306a2\u3064\u306e\u65b9\u6cd5\u3067\u3059\u3002 Random\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3002 import java.util [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-16942","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u306e\u30e9\u30f3\u30c0\u30e0\u6570\u306e\u30b3\u30fc\u30c9\u306f\u3069\u306e\u3088\u3046\u306b\u66f8\u3051\u3070\u3044\u3044\u3067\u3059\u304b\u3002 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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content=\"Java\u306e\u30e9\u30f3\u30c0\u30e0\u6570\u306e\u30b3\u30fc\u30c9\u306f\u3069\u306e\u3088\u3046\u306b\u66f8\u3051\u3070\u3044\u3044\u3067\u3059\u304b\u3002\" \/>\n<meta property=\"og:description\" content=\"Java\u306e\u30e9\u30f3\u30c0\u30e0\u6570\u306e\u30b3\u30fc\u30c9\u306f\u3069\u306e\u3088\u3046\u306b\u66f8\u3051\u3070\u3044\u3044\u3067\u3059\u304b\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306e\u30e9\u30f3\u30c0\u30e0\u6570\u306e\u30b3\u30fc\u30c9\u306f\u3069\u306e\u3088\u3046\u306b\u66f8\u3051\u3070\u3044\u3044\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" 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Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/#website\"},\"datePublished\":\"2024-03-15T20:29:31+00:00\",\"dateModified\":\"2025-08-06T00:31:49+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/#\/schema\/person\/601389077b7f4e4ad6115428e3b73bff\"},\"description\":\"Java\u306e\u30e9\u30f3\u30c0\u30e0\u6570\u306e\u30b3\u30fc\u30c9\u306f\u3069\u306e\u3088\u3046\u306b\u66f8\u3051\u3070\u3044\u3044\u3067\u3059\u304b\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e6%95%b0%e3%81%ae%e3%82%b3%e3%83%bc%e3%83%89%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e6%9b%b8%e3%81%91%e3%81%b0%e3%81%84%e3%81%84\/#breadcrumb\"},\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e6%95%b0%e3%81%ae%e3%82%b3%e3%83%bc%e3%83%89%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e6%9b%b8%e3%81%91%e3%81%b0%e3%81%84%e3%81%84\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e6%95%b0%e3%81%ae%e3%82%b3%e3%83%bc%e3%83%89%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e6%9b%b8%e3%81%91%e3%81%b0%e3%81%84%e3%81%84\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.silicloud.com\/ja\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Java\u306e\u30e9\u30f3\u30c0\u30e0\u6570\u306e\u30b3\u30fc\u30c9\u306f\u3069\u306e\u3088\u3046\u306b\u66f8\u3051\u3070\u3044\u3044\u3067\u3059\u304b\u3002\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/ja\/blog\/\",\"name\":\"Blog 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