{"id":103471,"date":"2024-03-22T06:56:02","date_gmt":"2024-03-21T21:56:02","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/%e9%87%8d%e8%a4%87%e3%81%aa%e3%81%97%e3%81%aejava%e9%85%8d%e5%88%97%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e3%81%aa%e5%80%a4%e3%81%ae%e7%94%9f%e6%88%90\/"},"modified":"2024-04-04T13:12:43","modified_gmt":"2024-04-04T04:12:43","slug":"%e9%87%8d%e8%a4%87%e3%81%aa%e3%81%97%e3%81%aejava%e9%85%8d%e5%88%97%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e3%81%aa%e5%80%a4%e3%81%ae%e7%94%9f%e6%88%90","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/%e9%87%8d%e8%a4%87%e3%81%aa%e3%81%97%e3%81%aejava%e9%85%8d%e5%88%97%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e3%81%aa%e5%80%a4%e3%81%ae%e7%94%9f%e6%88%90\/","title":{"rendered":"\u91cd\u8907\u306a\u3057\u306eJava\u914d\u5217\u306b\u304a\u3051\u308b\u30e9\u30f3\u30c0\u30e0\u306a\u5024\u306e\u751f\u6210"},"content":{"rendered":"<p>Java \u914d\u5217\u3067\u4e71\u6570\u3092\u91cd\u8907\u306a\u304f\u751f\u6210\u3059\u308b\u306b\u306f\u4ee5\u4e0b\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li>Java.util.Random\u30af\u30e9\u30b9\u3092\u5229\u7528\u3057\u3066\u4e71\u6570\u3092\u751f\u6210\u3057\u3001\u305d\u306e\u4e71\u6570\u3092Set\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u683c\u7d0d\u3057\u307e\u3059\u3002Set\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306f\u91cd\u8907\u3057\u305f\u8981\u7d20\u3092\u6301\u305f\u306a\u3044\u305f\u3081\u3001\u751f\u6210\u3055\u308c\u305f\u4e71\u6570\u306f\u91cd\u8907\u3057\u306a\u3044\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001Set\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u914d\u5217\u306b\u5909\u63db\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.util.HashSet;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.Random;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.Set;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">RandomArray<\/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\">int<\/span>[] array = generateRandomArray(<span class=\"hljs-number\">10<\/span>, <span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">100<\/span>);\r\n        <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> num : array) {\r\n            System.out.println(num);\r\n        }\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-type\">int<\/span>[] generateRandomArray(<span class=\"hljs-type\">int<\/span> length, <span class=\"hljs-type\">int<\/span> min, <span class=\"hljs-type\">int<\/span> max) {\r\n        <span class=\"hljs-keyword\">if<\/span> (length &gt; (max - min + <span class=\"hljs-number\">1<\/span>)) {\r\n            <span class=\"hljs-keyword\">throw<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">IllegalArgumentException<\/span>(<span class=\"hljs-string\">\"\u751f\u6210\u4e0d\u4e86\u6307\u5b9a\u8303\u56f4\u5185\u7684\u4e0d\u91cd\u590d\u968f\u673a\u6570\uff01\"<\/span>);\r\n        }\r\n        \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        Set&lt;Integer&gt; set = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">HashSet<\/span>&lt;&gt;();\r\n        \r\n        <span class=\"hljs-keyword\">while<\/span> (set.size() &lt; length) {\r\n            <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">randomNum<\/span> <span class=\"hljs-operator\">=<\/span> random.nextInt(max - min + <span class=\"hljs-number\">1<\/span>) + min;\r\n            set.add(randomNum);\r\n        }\r\n        \r\n        <span class=\"hljs-type\">int<\/span>[] array = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">int<\/span>[length];\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">index<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">0<\/span>;\r\n        <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> num : set) {\r\n            array[index++] = num;\r\n        }\r\n        \r\n        <span class=\"hljs-keyword\">return<\/span> array;\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>\u5225\u306e\u65b9\u6cd5\u3068\u3057\u3066\u3001Fisher-Yates\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u7528\u3044\u308b\u65b9\u6cd5\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u914d\u5217\u5185\u306e\u8981\u7d20\u306e\u4f4d\u7f6e\u3092\u5165\u308c\u66ff\u3048\u308b\u3053\u3068\u3067\u3001\u91cd\u8907\u306e\u306a\u3044\u4e71\u6570\u3092\u751f\u6210\u3059\u308b\u624b\u6cd5\u3067\u3059\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_\">RandomArray<\/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\">int<\/span>[] array = generateRandomArray(<span class=\"hljs-number\">10<\/span>, <span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">100<\/span>);\r\n        <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> num : array) {\r\n            System.out.println(num);\r\n        }\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-type\">int<\/span>[] generateRandomArray(<span class=\"hljs-type\">int<\/span> length, <span class=\"hljs-type\">int<\/span> min, <span class=\"hljs-type\">int<\/span> max) {\r\n        <span class=\"hljs-keyword\">if<\/span> (length &gt; (max - min + <span class=\"hljs-number\">1<\/span>)) {\r\n            <span class=\"hljs-keyword\">throw<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">IllegalArgumentException<\/span>(<span class=\"hljs-string\">\"\u751f\u6210\u4e0d\u4e86\u6307\u5b9a\u8303\u56f4\u5185\u7684\u4e0d\u91cd\u590d\u968f\u673a\u6570\uff01\"<\/span>);\r\n        }\r\n        \r\n        <span class=\"hljs-type\">int<\/span>[] array = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">int<\/span>[length];\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-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">i<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">0<\/span>; i &lt; length; i++) {\r\n            <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">randomIndex<\/span> <span class=\"hljs-operator\">=<\/span> random.nextInt(max - min + <span class=\"hljs-number\">1<\/span> - i) + i;\r\n            array[i] = randomIndex;\r\n            \r\n            <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">temp<\/span> <span class=\"hljs-operator\">=<\/span> array[i];\r\n            array[i] = array[randomIndex];\r\n            array[randomIndex] = temp;\r\n        }\r\n        \r\n        <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">i<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">0<\/span>; i &lt; length; i++) {\r\n            array[i] = array[i] + min;\r\n        }\r\n        \r\n        <span class=\"hljs-keyword\">return<\/span> array;\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4e71\u6570\u3092\u751f\u6210\u3057\u3066\u914d\u5217\u306b\u5165\u308c\u308b\u65b9\u6cd5\u304c2\u3064\u3042\u308a\u3001\u91cd\u8907\u3057\u306a\u3044\u4e71\u6570\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306b\u3001\u4e00\u7a2e\u306fSet\u96c6\u5408\u3092\u7528\u3044\u3001\u3082\u3046\u4e00\u7a2e\u306fFisher-Yates\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u3002\u305d\u308c\u305e\u308c\u306e\u30cb\u30fc\u30ba\u306b\u3088\u3063\u3066\u3069\u3061\u3089\u306e\u65b9\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u304b\u3092\u9078\u629e\u3059\u308c\u3070\u826f\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u914d\u5217\u3067\u4e71\u6570\u3092\u91cd\u8907\u306a\u304f\u751f\u6210\u3059\u308b\u306b\u306f\u4ee5\u4e0b\u306e\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002 Java.util.Random\u30af\u30e9\u30b9\u3092\u5229\u7528\u3057\u3066\u4e71\u6570\u3092\u751f\u6210\u3057\u3001\u305d\u306e\u4e71\u6570\u3092Set\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u683c\u7d0d\u3057\u307e\u3059\u3002Set\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306f\u91cd\u8907\u3057\u305f\u8981\u7d20\u3092\u6301\u305f\u306a\u3044\u305f\u3081\u3001\u751f [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-103471","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) - 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Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-21T21:56:02+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-04T04:12:43+00:00\" \/>\n<meta name=\"author\" content=\"\u5149, \u660e\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u5149, \u660e\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/%e9%87%8d%e8%a4%87%e3%81%aa%e3%81%97%e3%81%aejava%e9%85%8d%e5%88%97%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e3%81%aa%e5%80%a4%e3%81%ae%e7%94%9f%e6%88%90\/\",\"url\":\"https:\/\/www.silicloud.com\/ja\/blog\/%e9%87%8d%e8%a4%87%e3%81%aa%e3%81%97%e3%81%aejava%e9%85%8d%e5%88%97%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%83%a9%e3%83%b3%e3%83%80%e3%83%a0%e3%81%aa%e5%80%a4%e3%81%ae%e7%94%9f%e6%88%90\/\",\"name\":\"\u91cd\u8907\u306a\u3057\u306eJava\u914d\u5217\u306b\u304a\u3051\u308b\u30e9\u30f3\u30c0\u30e0\u306a\u5024\u306e\u751f\u6210 - 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