{"id":680,"date":"2023-10-23T04:03:16","date_gmt":"2023-03-07T13:36:56","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/java%e3%81%ae%e9%85%8d%e5%88%97%e3%81%ab%e7%89%b9%e5%ae%9a%e3%81%ae%e5%80%a4%e3%81%8c%e5%90%ab%e3%81%be%e3%82%8c%e3%81%a6%e3%81%84%e3%82%8b%e3%81%8b%e3%81%a9%e3%81%86%e3%81%8b%e3%82%92%e7%a2%ba\/"},"modified":"2025-08-01T01:36:29","modified_gmt":"2025-07-31T16:36:29","slug":"java%e3%81%ae%e9%85%8d%e5%88%97%e3%81%ab%e7%89%b9%e5%ae%9a%e3%81%ae%e5%80%a4%e3%81%8c%e5%90%ab%e3%81%be%e3%82%8c%e3%81%a6%e3%81%84%e3%82%8b%e3%81%8b%e3%81%a9%e3%81%86%e3%81%8b%e3%82%92%e7%a2%ba","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ae%e9%85%8d%e5%88%97%e3%81%ab%e7%89%b9%e5%ae%9a%e3%81%ae%e5%80%a4%e3%81%8c%e5%90%ab%e3%81%be%e3%82%8c%e3%81%a6%e3%81%84%e3%82%8b%e3%81%8b%e3%81%a9%e3%81%86%e3%81%8b%e3%82%92%e7%a2%ba\/","title":{"rendered":"Java\u306e\u914d\u5217\u306b\u7279\u5b9a\u306e\u5024\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u306f\u3042\u308a\u307e\u3059\u304b\uff1f"},"content":{"rendered":"<h2>Java\u306e\u914d\u5217\u306b\u7279\u5b9a\u306e\u5024\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u306f\u3069\u306e\u3088\u3046\u306b\u3059\u308b\u306e\u304b\uff1f<\/h2>\n<p>Java\u306e\u914d\u5217\u304c\u7279\u5b9a\u306e\u5024\u3092\u542b\u3093\u3067\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li>Simple iteration using for loop<\/li>\n<li>List contains() method<\/li>\n<li>Stream anyMatch() method<\/li>\n<li>Arrays binarySearch() for sorted array<\/li>\n<\/ul>\n<p>\u4e00\u3064\u305a\u3064\u3053\u308c\u3089\u306e\u65b9\u6cd5\u3092\u8abf\u3079\u3066\u307f\u307e\u3057\u3087\u3046\u3002 (Hitotsu zutsu korera no h\u014dh\u014d o shirabete mimashou.)<\/p>\n<h3>1. \u30d5\u30a9\u30fc\u30eb\u30fc\u30d7\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3002 (F\u014d r\u016bpu o shiy\u014d shite iru.)<\/h3>\n<p>\u3053\u308c\u306f\u3001\u914d\u5217\u304c\u7279\u5b9a\u306e\u5024\u3092\u542b\u3093\u3067\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u6700\u3082\u7c21\u5358\u3067\u4fbf\u5229\u306a\u65b9\u6cd5\u3067\u3059\u3002for\u30eb\u30fc\u30d7\u3092\u4f7f\u7528\u3057\u3066\u914d\u5217\u306e\u8981\u7d20\u3092\u78ba\u8a8d\u3057\u3001equals()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u914d\u5217\u306e\u8981\u7d20\u3068\u4e0e\u3048\u3089\u308c\u305f\u5024\u304c\u7b49\u3057\u3044\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>String[] vowels = { \"A\", \"I\", \"E\", \"O\", \"U\" };\r\n\r\n\/\/ using simple iteration over the array elements\r\nfor (String s : vowels) {\r\n\tif (\"E\".equals(s)) {\r\n\t\tSystem.out.println(\"E found in the vowels list.\");\r\n\t}\r\n}\r\n<\/code><\/pre>\n<h3>2. List\u306econtains()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3002<\/h3>\n<p>\u79c1\u305f\u3061\u306f\u3001\u914d\u5217\u306e\u30ea\u30b9\u30c8\u8868\u73fe\u3092\u5f97\u308b\u305f\u3081\u306bArrays\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001contains()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u914d\u5217\u304c\u5024\u3092\u542b\u3093\u3067\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u30b9\u30cb\u30da\u30c3\u30c8\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306bJShell\u3092\u4f7f\u7528\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code>jshell&gt; String[] vowels = { \"A\", \"I\", \"E\", \"O\", \"U\" };\r\nvowels ==&gt; String[5] { \"A\", \"I\", \"E\", \"O\", \"U\" }\r\n\r\njshell&gt; List vowelsList = Arrays.asList(vowels);\r\nvowelsList ==&gt; [A, I, E, O, U]\r\n\r\njshell&gt; vowelsList.contains(\"U\")\r\n$3 ==&gt; true\r\n\r\njshell&gt; vowelsList.contains(\"X\")\r\n$4 ==&gt; false\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564965fdaa94e2bdf7bfb31\/10-0.png\" alt=\"Java Array Contains Value\" \/><\/div>\n<h3>3. Stream\u306eanyMatch()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3002<\/h3>\n<p>\u3082\u3057Java 8\u4ee5\u4e0a\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u914d\u5217\u304b\u3089\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001anyMatch()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30e9\u30e0\u30c0\u5f0f\u3067\u6307\u5b9a\u3057\u305f\u5024\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>jshell&gt; List vowelsList = Arrays.asList(vowels);\r\nvowelsList ==&gt; [A, I, E, O, U]\r\n\r\njshell&gt; Arrays.stream(vowels).anyMatch(\"O\"::equals);\r\n$5 ==&gt; true\r\n\r\njshell&gt; Arrays.stream(vowels).anyMatch(\"X\"::equals);\r\n$6 ==&gt; false\r\n<\/code><\/pre>\n<h3>4. \u30bd\u30fc\u30c8\u6e08\u307f\u914d\u5217\u306b\u5bfe\u3059\u308b\u914d\u5217\u306ebinarySearch()<\/h3>\n<p>\u3082\u3057\u914d\u5217\u304c\u30bd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001Arrays\u306ebinarySearch()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u914d\u5217\u304c\u6307\u5b9a\u3057\u305f\u5024\u3092\u542b\u3080\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>String[] vowels = { \"A\", \"I\", \"E\", \"O\", \"U\" };\r\n\r\nSystem.out.println(\"Unsorted Array = \" + Arrays.toString(vowels));\r\n\r\nArrays.parallelSort(vowels);\r\n\r\nSystem.out.println(\"Sorted Array = \" + Arrays.toString(vowels));\r\n\r\nint index = Arrays.binarySearch(vowels, \"X\");\r\n\r\nif (index &lt; 0) {\r\n\tSystem.out.println(\"X not found in the array\");\r\n} else {\r\n\tSystem.out.println(\"X found in the array\");\r\n}\r\n<\/code><\/pre>\n<p>\u51fa\u529b:<\/p>\n<pre class=\"post-pre\"><code>Unsorted Array = [A, I, E, O, U]\r\nSorted Array = [A, E, I, O, U]\r\nX not found in the array\r\n<\/code><\/pre>\n<h2>\u914d\u5217\u306b\u8907\u6570\u306e\u5024\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/h2>\n<p>\u3082\u3057\u3001\u914d\u5217\u304c\u8907\u6570\u306e\u5024\u3092\u542b\u3093\u3067\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3057\u305f\u3044\u5834\u5408\u306f\u3069\u3046\u3067\u3057\u3087\u3046\u304b\u3002\u4f8b\u3048\u3070\u3001\u4e0e\u3048\u3089\u308c\u305f\u914d\u5217\u304c\u30bd\u30fc\u30b9\u306e\u914d\u5217\u306e\u90e8\u5206\u96c6\u5408\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u305f\u3044\u3068\u3057\u307e\u3059\u3002\u30cd\u30b9\u30c8\u3055\u308c\u305f\u30eb\u30fc\u30d7\u3092\u4f5c\u6210\u3057\u3001\u8981\u7d20\u30921\u3064\u305a\u3064\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3053\u3068\u3067\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u914d\u5217\u3092\u30ea\u30b9\u30c8\u306b\u5909\u63db\u3057\u3001containsAll()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u30b9\u30de\u30fc\u30c8\u306a\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>String[] vowels = { \"A\", \"I\", \"E\", \"O\", \"U\" };\r\nString[] subset = { \"E\", \"U\" };\r\n\r\nboolean foundAll = Arrays.asList(vowels).containsAll(Arrays.asList(subset));\r\n\r\nSystem.out.println(\"vowels contains all the elements in subset = \" + foundAll);\r\n<\/code><\/pre>\n<p>\u51fa\u529b\uff1a\u300c\u6bcd\u97f3\u306b\u306f\u90e8\u5206\u96c6\u5408\u306e\u3059\u3079\u3066\u306e\u8981\u7d20\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u300d\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u53c2\u8003\u6587\u732e<\/h2>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u914d\u5217\u306ebinarySearch() API\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u30b9\u30c8\u30ea\u30fc\u30e0\u306eanyMatch() API\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Java\u306e\u914d\u5217\u306b\u7279\u5b9a\u306e\u5024\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u306f\u3069\u306e\u3088\u3046\u306b\u3059\u308b\u306e\u304b\uff1f Java\u306e\u914d\u5217\u304c\u7279\u5b9a\u306e\u5024\u3092\u542b\u3093\u3067\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u65b9\u6cd5\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002 Simple iteration using for loop [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-680","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) - 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