{"id":120900,"date":"2024-03-24T00:27:59","date_gmt":"2024-03-23T15:27:59","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java-map-containskey%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%82%92%e8%aa%ac%e6%98%8e%e3%81%97%e3%81%be%e3%81%99\/"},"modified":"2024-04-04T13:04:33","modified_gmt":"2024-04-04T04:04:33","slug":"java-map-containskey%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%82%92%e8%aa%ac%e6%98%8e%e3%81%97%e3%81%be%e3%81%99","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java-map-containskey%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%82%92%e8%aa%ac%e6%98%8e%e3%81%97%e3%81%be%e3%81%99\/","title":{"rendered":"Java Map containsKey()\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u3092\u8aac\u660e\u3057\u307e\u3059"},"content":{"rendered":"<p>containsKey()\u30e1\u30bd\u30c3\u30c9\u306f\u3001Java\u306eMap\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3001\u6307\u5b9a\u3057\u305f\u30ad\u30fc\u304cMap\u5185\u306b\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u30e1\u30bd\u30c3\u30c9\u30b7\u30b0\u30cd\u30c1\u30e3\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<p>\u30ad\u30fc\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u6c7a\u5b9a\u3059\u308b<\/p>\n<p>\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306e key \u306f\u8abf\u3079\u3089\u308c\u308b\u30ad\u30fc\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3059\u3002\u30de\u30c3\u30d7\u5185\u306b\u6307\u5b9a\u3055\u308c\u305f\u30ad\u30fc\u304c\u3042\u308c\u3070 true \u304c\u8fd4\u3055\u308c\u3001\u306a\u3051\u308c\u3070 false \u304c\u8fd4\u3055\u308c\u308b\u3002<\/p>\n<p>containsKey()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u4f8b\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.util.HashMap;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.Map;\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Main<\/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\nMap&lt;String, Integer&gt; map = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">HashMap<\/span>&lt;&gt;();\r\nmap.put(<span class=\"hljs-string\">\"apple\"<\/span>, <span class=\"hljs-number\">1<\/span>);\r\nmap.put(<span class=\"hljs-string\">\"banana\"<\/span>, <span class=\"hljs-number\">2<\/span>);\r\nmap.put(<span class=\"hljs-string\">\"orange\"<\/span>, <span class=\"hljs-number\">3<\/span>);\r\n<span class=\"hljs-comment\">\/\/ \u5224\u65ad\u952e\"apple\"\u662f\u5426\u5b58\u5728\u4e8eMap\u4e2d<\/span>\r\n<span class=\"hljs-keyword\">if<\/span> (map.containsKey(<span class=\"hljs-string\">\"apple\"<\/span>)) {\r\nSystem.out.println(<span class=\"hljs-string\">\"\u952e\\\"apple\\\"\u5b58\u5728\u4e8eMap\u4e2d\"<\/span>);\r\n} <span class=\"hljs-keyword\">else<\/span> {\r\nSystem.out.println(<span class=\"hljs-string\">\"\u952e\\\"apple\\\"\u4e0d\u5b58\u5728\u4e8eMap\u4e2d\"<\/span>);\r\n}\r\n<span class=\"hljs-comment\">\/\/ \u5224\u65ad\u952e\"pear\"\u662f\u5426\u5b58\u5728\u4e8eMap\u4e2d<\/span>\r\n<span class=\"hljs-keyword\">if<\/span> (map.containsKey(<span class=\"hljs-string\">\"pear\"<\/span>)) {\r\nSystem.out.println(<span class=\"hljs-string\">\"\u952e\\\"pear\\\"\u5b58\u5728\u4e8eMap\u4e2d\"<\/span>);\r\n} <span class=\"hljs-keyword\">else<\/span> {\r\nSystem.out.println(<span class=\"hljs-string\">\"\u952e\\\"pear\\\"\u4e0d\u5b58\u5728\u4e8eMap\u4e2d\"<\/span>);\r\n}\r\n}\r\n}\r\n<\/code><\/pre>\n<p>\u51fa\u529b\u306f\u4ee5\u4e0b<\/p>\n<pre class=\"post-pre\"><code>\u952e\"apple\"\u5b58\u5728\u4e8eMap\u4e2d\r\n\u952e\"pear\"\u4e0d\u5b58\u5728\u4e8eMap\u4e2d\r\n<\/code><\/pre>\n<p>\u4e0a\u306e\u4f8b\u3067\u306f\u3001HashMap\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u30013\u3064\u306e\u30ad\u30fc\u30d0\u30ea\u30e5\u30fc\u30da\u30a2\u3092\u8ffd\u52a0\u3057\u307e\u3057\u305f\u3002\u305d\u3057\u3066\u3001containsKey()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u3001\u30ad\u30fc\u3067\u3042\u308b&#8221;apple&#8221;\u3068&#8221;pear&#8221;\u304c\u30de\u30c3\u30d7\u5185\u306b\u3042\u308b\u304b\u3092\u5224\u5b9a\u3057\u3001\u305d\u308c\u306b\u5bfe\u3059\u308b\u7d50\u679c\u3092\u51fa\u529b\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>map\u306econtainsKey\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306e\u578b\u306fmap\u306e\u30ad\u30fc\u306e\u578b\u3068\u4e00\u81f4\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u4e0a\u8a18\u3067\u306f\u6587\u5b57\u5217\u578b\u306e\u30ad\u30fc\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u306e\u3067\u6587\u5b57\u5217\u578b\u306e\u5f15\u6570\u3092\u6e21\u3057\u3066\u3044\u307e\u3059\u3002\u5f15\u6570\u306e\u578b\u304c\u30ad\u30fc\u306e\u578b\u3068\u4e00\u81f4\u3057\u306a\u3044\u3068\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u578b\u4e0d\u4e00\u81f4\u306e\u30a8\u30e9\u30fc\u3092\u51fa\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>containsKey()\u30e1\u30bd\u30c3\u30c9\u306f\u3001Java\u306eMap\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3001\u6307\u5b9a\u3057\u305f\u30ad\u30fc\u304cMap\u5185\u306b\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u30e1\u30bd\u30c3\u30c9\u30b7\u30b0\u30cd\u30c1\u30e3\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002 \u30ad\u30fc\u304c\u6307\u5b9a [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-120900","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 Map containsKey()\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u3092\u8aac\u660e\u3057\u307e\u3059 - 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\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/java-map-containskey\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u3092\u8aac\u660e\u3057\u307e\u3059\/\" \/>\n<meta property=\"og:locale\" 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