{"id":134134,"date":"2024-03-26T06:34:36","date_gmt":"2024-03-25T21:34:36","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%aecontainskey%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%81%af%ef%bc%9f\/"},"modified":"2024-04-05T17:32:38","modified_gmt":"2024-04-05T08:32:38","slug":"java%e3%81%aecontainskey%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%81%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%aecontainskey%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%81%af%ef%bc%9f\/","title":{"rendered":"java\u306econtainsKey\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u306f\uff1f"},"content":{"rendered":"

containsKey\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001Java\u306eMap\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u6307\u5b9a\u3057\u305f\u30ad\u30fc\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u4f7f\u7528\u65b9\u6cd5\uff1a<\/p>\n

    \n
  1. Map \u30af\u30e9\u30b9\u3092\u542b\u3080\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n
    import java.util.Map;\r\n<\/code><\/pre>\n
      \n
    1. Map\u578b\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3059\u308b:<\/li>\n<\/ol>\n
      Map<String, Integer> map = new HashMap<>();\r\n<\/code><\/pre>\n
        \n
      1. \u30de\u30c3\u30d7\u306b\u30ad\u30fc\u3068\u5024\u306e\u30da\u30a2\u3092\u8ffd\u52a0\u3059\u308b:<\/li>\n<\/ol>\n
        map.put(\"key1\", 1);\r\nmap.put(\"key2\", 2);\r\nmap.put(\"key3\", 3);\r\n<\/code><\/pre>\n
          \n
        1. containsKey\u30e1\u30bd\u30c3\u30c9\u3092\u7528\u3044\u3066\u3001Map\u5185\u306b\u6307\u5b9a\u3055\u308c\u305f\u30ad\u30fc\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3092\u5224\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n
          boolean containsKey = map.containsKey(\"key1\");\r\nSystem.out.println(containsKey); \/\/ \u8f93\u51fa true\r\ncontainsKey = map.containsKey(\"key4\");\r\nSystem.out.println(containsKey); \/\/ \u8f93\u51fa false\r\n<\/code><\/pre>\n
          \u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u6700\u521d\u306bHashMap\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001\u305d\u306e\u5f8c3\u3064\u306e\u30ad\u30fc\u30d0\u30ea\u30e5\u30fc\u30da\u30a2\u3092\u8ffd\u52a0\u3057\u307e\u3057\u305f\u3002\u305d\u306e\u5f8c\u3001containsKey\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u300ckey1\u300d\u3068\u300ckey4\u300d\u3068\u3044\u30462\u3064\u306e\u30ad\u30fc\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u305d\u308c\u305e\u308c\u5224\u5b9a\u3057\u3001\u305d\u306e\u7d50\u679c\u3092\u51fa\u529b\u3057\u307e\u3057\u305f\u3002\u30de\u30c3\u30d7\u306b\u306f\u300ckey1\u300d\u304c\u542b\u307e\u308c\u3066\u3044\u3066\u300ckey4\u300d\u306f\u542b\u307e\u308c\u3066\u3044\u306a\u3044\u305f\u3081\u3001\u6700\u521d\u306e\u51fa\u529b\u306ftrue\u30012\u756a\u76ee\u306e\u51fa\u529b\u306ffalse\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
          containsKey\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001Java\u306eMap\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u6307\u5b9a\u3057\u305f\u30ad\u30fc\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u4f7f\u7528\u65b9\u6cd5\uff1a Map \u30af\u30e9\u30b9\u3092\u542b\u3080\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002 import java.util.M […]<\/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-134134","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\njava\u306econtainsKey\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u306f\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\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306econtainskey\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u306f\uff1f\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"java\u306econtainsKey\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u306f\uff1f\" \/>\n<meta property=\"og:description\" content=\"containsKey\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001Java\u306eMap\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u6307\u5b9a\u3057\u305f\u30ad\u30fc\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u4f7f\u7528\u65b9\u6cd5\uff1a Map \u30af\u30e9\u30b9\u3092\u542b\u3080\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002 import java.util.M […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306econtainskey\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u306f\uff1f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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