{"id":27046,"date":"2024-03-17T08:41:00","date_gmt":"2024-03-16T23:41:00","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e3%81%ae%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2024-03-22T15:18:03","modified_gmt":"2024-03-22T06:18:03","slug":"java%e3%81%a7%e3%81%ae%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e3%81%ae%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"Java\u3067\u306e\u30e9\u30f3\u30c0\u30e0\u6570\u306e\u4f7f\u3044\u65b9\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<p>Java\u3067\u306f\u3001Random\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u30e9\u30f3\u30c0\u30e0\u306a\u6570\u5024\u3092\u751f\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u624b\u9806\u3092\u4f7f\u3063\u3066\u305d\u308c\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n<ol>\n<li>Random\u30af\u30e9\u30b9\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\uff1a\u30b3\u30fc\u30c9\u306e\u5148\u982d\u306bRandom\u30af\u30e9\u30b9\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u65b9\u6cd5\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.util.Random;\r\n<\/code><\/pre>\n<ol>\n<li>Random\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\uff1a\u6b21\u306e\u30b3\u30fc\u30c9\u3067Random\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><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<\/code><\/pre>\n<ol>\n<li>\u30e9\u30f3\u30c0\u30e0\u306a\u6570\u5b57\u3092\u751f\u6210\u3059\u308b\uff1aRandom\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30e9\u30f3\u30c0\u30e0\u306a\u6570\u5b57\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b\u65b9\u6cd5\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/li>\n<\/ol>\n<ol>\n<li>nextInt()\u30e1\u30bd\u30c3\u30c9\uff1a\u30e9\u30f3\u30c0\u30e0\u306aint\u578b\u306e\u6574\u6570\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/li>\n<li>nextDouble()\u30e1\u30bd\u30c3\u30c9\uff1a0.0\u304b\u30891.0\u306e\u9593\u306e\u30e9\u30f3\u30c0\u30e0\u306adouble\u578b\u306e\u6570\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/li>\n<li>nextBoolean()\u30e1\u30bd\u30c3\u30c9\uff1a\u30e9\u30f3\u30c0\u30e0\u306aboolean\u5024\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/li>\n<li>nextFloat()\u30e1\u30bd\u30c3\u30c9\u306f\u30010.0\u304b\u30891.0\u306e\u9593\u3067\u30e9\u30f3\u30c0\u30e0\u306afloat\u578b\u306e\u6570\u5024\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u30e9\u30f3\u30c0\u30e0\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u4e71\u6570\u3092\u751f\u6210\u3059\u308b\u4f8b\u3067\u3059\uff1a<\/p>\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_\">RandomExample<\/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-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\u7684int\u7c7b\u578b\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        System.out.println(<span class=\"hljs-string\">\"\u968f\u673a\u6574\u6570\uff1a\"<\/span> + randomNumber);\r\n        \r\n        <span class=\"hljs-comment\">\/\/ \u751f\u6210\u4e00\u4e2a\u968f\u673a\u7684double\u7c7b\u578b\u6570\uff08\u8303\u56f4\u57280.0\u52301.0\u4e4b\u95f4\uff09<\/span>\r\n        <span class=\"hljs-type\">double<\/span> <span class=\"hljs-variable\">randomDouble<\/span> <span class=\"hljs-operator\">=<\/span> random.nextDouble();\r\n        System.out.println(<span class=\"hljs-string\">\"\u968f\u673adouble\u6570\uff1a\"<\/span> + randomDouble);\r\n        \r\n        <span class=\"hljs-comment\">\/\/ \u751f\u6210\u4e00\u4e2a\u968f\u673a\u7684boolean\u503c<\/span>\r\n        <span class=\"hljs-type\">boolean<\/span> <span class=\"hljs-variable\">randomBoolean<\/span> <span class=\"hljs-operator\">=<\/span> random.nextBoolean();\r\n        System.out.println(<span class=\"hljs-string\">\"\u968f\u673aboolean\u503c\uff1a\"<\/span> + randomBoolean);\r\n        \r\n        <span class=\"hljs-comment\">\/\/ \u751f\u6210\u4e00\u4e2a\u968f\u673a\u7684float\u7c7b\u578b\u6570\uff08\u8303\u56f4\u57280.0\u52301.0\u4e4b\u95f4\uff09<\/span>\r\n        <span class=\"hljs-type\">float<\/span> <span class=\"hljs-variable\">randomFloat<\/span> <span class=\"hljs-operator\">=<\/span> random.nextFloat();\r\n        System.out.println(<span class=\"hljs-string\">\"\u968f\u673afloat\u6570\uff1a\"<\/span> + randomFloat);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u51fa\u529b\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>\u968f\u673a\u6574\u6570\uff1a-123456789\r\n\u968f\u673adouble\u6570\uff1a0.123456789\r\n\u968f\u673aboolean\u503c\uff1atrue\r\n\u968f\u673afloat\u6570\uff1a0.9876543\r\n<\/code><\/pre>\n<p>Random\u30af\u30e9\u30b9\u3092\u4f7f\u3063\u3066\u30e9\u30f3\u30c0\u30e0\u306a\u6570\u5024\u3092\u751f\u6210\u3059\u308b\u57fa\u672c\u7684\u306a\u65b9\u6cd5\u3067\u3059\u3002\u5177\u4f53\u7684\u306a\u8981\u6c42\u306b\u5fdc\u3058\u3066\u3001Random\u30af\u30e9\u30b9\u306e\u4ed6\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3088\u308a\u9ad8\u5ea6\u306a\u30e9\u30f3\u30c0\u30e0\u6570\u751f\u6210\u3092\u884c\u3046\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u306f\u3001Random\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u30e9\u30f3\u30c0\u30e0\u306a\u6570\u5024\u3092\u751f\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u624b\u9806\u3092\u4f7f\u3063\u3066\u305d\u308c\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a Random\u30af\u30e9\u30b9\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\uff1a\u30b3\u30fc\u30c9\u306e\u5148\u982d\u306bRandom\u30af\u30e9\u30b9\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u65b9\u6cd5\u306f\u4ee5 [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-27046","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"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\u3067\u306e\u30e9\u30f3\u30c0\u30e0\u6570\u306e\u4f7f\u3044\u65b9\u306f\u4f55\u3067\u3059\u304b\uff1f - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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