{"id":127189,"date":"2024-03-25T01:29:51","date_gmt":"2024-03-24T16:29:51","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%aemap%e3%82%92%e5%8f%8d%e5%be%a9%e5%87%a6%e7%90%86%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/"},"modified":"2024-04-05T21:35:00","modified_gmt":"2024-04-05T12:35:00","slug":"java%e3%81%aemap%e3%82%92%e5%8f%8d%e5%be%a9%e5%87%a6%e7%90%86%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%aemap%e3%82%92%e5%8f%8d%e5%be%a9%e5%87%a6%e7%90%86%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/","title":{"rendered":"Java\u306eMap\u3092\u53cd\u5fa9\u51e6\u7406\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"

Java \u306e Map \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u53cd\u5fa9\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u304c\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002<\/p>\n

    \n
  1. entrySet\u3067\u5168\u4ef6\u8d70\u67fb\uff1aentrySet()\u30e1\u30bd\u30c3\u30c9\u3067Map.Entry\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u96c6\u5408\u3092\u53d6\u5f97\u3057\u3001\u30a4\u30c6\u30ec\u30fc\u30bf\u3084foreach\u30eb\u30fc\u30d7\u3067\u96c6\u5408\u3092\u8d70\u67fb\u3057\u3001Map.Entry\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306egetKey()\u3001getValue()\u30e1\u30bd\u30c3\u30c9\u3067\u30ad\u30fc\u3068\u5024\u3092\u53d6\u5f97\u3059\u308b\u3002<\/li>\n<\/ol>\n
    Map<K, V> map = new<\/span> HashMap<\/span><>();\r\n\/\/ \u6dfb\u52a0\u952e\u503c\u5bf9<\/span>\r\nSet<Map.Entry<K, V>> entrySet = map.entrySet();\r\nfor<\/span> (Map.Entry<K, V> entry : entrySet) {\r\nK<\/span> key<\/span> =<\/span> entry.getKey();\r\nV<\/span> value<\/span> =<\/span> entry.getValue();\r\n\/\/ \u5904\u7406\u952e\u503c\u5bf9\u7684\u903b\u8f91<\/span>\r\n}\r\n<\/code><\/pre>\n
      \n
    1. KeySet\u3092\u4f7f\u3063\u3066\u30a4\u30c6\u30ec\u30fc\u30c8\u3059\u308b: Map\u306ekeySet()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u30ad\u30fc\u306e\u30bb\u30c3\u30c8\u3092\u53d6\u5f97\u3057\u3001\u30a4\u30c6\u30ec\u30fc\u30bf\u307e\u305f\u306fforeach\u30eb\u30fc\u30d7\u3092\u4f7f\u3063\u3066\u30bb\u30c3\u30c8\u3092\u30a4\u30c6\u30ec\u30fc\u30c8\u3057\u3001\u30ad\u30fc\u304b\u3089\u5bfe\u5fdc\u3059\u308b\u5024\u3092\u53d6\u5f97\u3059\u308b\u3002<\/li>\n<\/ol>\n
      Map<K, V> map = new<\/span> HashMap<\/span><>();\r\n\/\/ \u6dfb\u52a0\u952e\u503c\u5bf9<\/span>\r\nSet<K> keySet = map.keySet();\r\nfor<\/span> (K key : keySet) {\r\nV<\/span> value<\/span> =<\/span> map.get(key);\r\n\/\/ \u5904\u7406\u952e\u503c\u5bf9\u7684\u903b\u8f91<\/span>\r\n}\r\n<\/code><\/pre>\n
        \n
      1. Values\u3092\u5229\u7528\u3057\u3066\u53cd\u5fa9\u51e6\u7406\u3059\u308b: Map\u306evalues()\u30e1\u30bd\u30c3\u30c9\u3067\u5024\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u53d6\u5f97\u3057\u3001\u53cd\u5fa9\u5b50\u307e\u305f\u306fforeach\u30eb\u30fc\u30d7\u3067\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u53cd\u5fa9\u51e6\u7406\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n
        Map<K, V> map = new<\/span> HashMap<\/span><>();\r\n\/\/ \u6dfb\u52a0\u952e\u503c\u5bf9<\/span>\r\nCollection<V> values = map.values();\r\nfor<\/span> (V value : values) {\r\n\/\/ \u5904\u7406\u503c\u7684\u903b\u8f91<\/span>\r\n}\r\n<\/code><\/pre>\n
          \n
        1. Map\u306eforEach\u30e1\u30bd\u30c3\u30c9\u3068\u30e9\u30e0\u30c0\u5f0f\u3092\u4f7f\u7528\u3057\u3066\u3001\u30ad\u30fc\u30da\u30a2\u306e\u53cd\u5fa9\u51e6\u7406\u3092\u884c\u3044\u307e\u3059(JDK 8\u4ee5\u964d)\u3002<\/li>\n<\/ol>\n
          Map<K, V> map = new<\/span> HashMap<\/span><>();\r\n\/\/ \u6dfb\u52a0\u952e\u503c\u5bf9<\/span>\r\nmap.forEach((key, value) -> {\r\n\/\/ \u5904\u7406\u952e\u503c\u5bf9\u7684\u903b\u8f91<\/span>\r\n});\r\n<\/code><\/pre>\n
          EntrySet \u904d\u5386\u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092 1 \u56de\u3057\u304b\u30b9\u30ad\u30e3\u30f3\u3057\u306a\u3044\u305f\u3081\u3001\u4ed6\u306e 2 \u3064\u306e\u65b9\u6cd5\u3088\u308a\u3082\u52b9\u7387\u7684\u3067\u3059\u3002KeySet \u307e\u305f\u306f Values \u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092 2 \u56de\u30b9\u30ad\u30e3\u30f3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u307e\u305f\u3001\u30e9\u30e0\u30c0\u5f0f\u306b\u3088\u308b\u53cd\u5fa9\u51e6\u7406\u306f JDK 8 \u4ee5\u964d\u3067\u306e\u307f\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
          Java \u306e Map \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u53cd\u5fa9\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u304c\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002 entrySet\u3067\u5168\u4ef6\u8d70\u67fb\uff1aentrySet()\u30e1\u30bd\u30c3\u30c9\u3067Map.Entry\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u96c6\u5408\u3092\u53d6\u5f97\u3057\u3001\u30a4\u30c6\u30ec\u30fc\u30bf\u3084foreach\u30eb\u30fc\u30d7\u3067\u96c6\u5408 […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-127189","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nJava\u306eMap\u3092\u53cd\u5fa9\u51e6\u7406\u3059\u308b\u65b9\u6cd5 - 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\u306emap\u3092\u53cd\u5fa9\u51e6\u7406\u3059\u308b\u65b9\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u306eMap\u3092\u53cd\u5fa9\u51e6\u7406\u3059\u308b\u65b9\u6cd5\" \/>\n<meta property=\"og:description\" content=\"Java \u306e Map \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u53cd\u5fa9\u51e6\u7406\u3059\u308b\u65b9\u6cd5\u304c\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002 entrySet\u3067\u5168\u4ef6\u8d70\u67fb\uff1aentrySet()\u30e1\u30bd\u30c3\u30c9\u3067Map.Entry\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u96c6\u5408\u3092\u53d6\u5f97\u3057\u3001\u30a4\u30c6\u30ec\u30fc\u30bf\u3084foreach\u30eb\u30fc\u30d7\u3067\u96c6\u5408 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u306emap\u3092\u53cd\u5fa9\u51e6\u7406\u3059\u308b\u65b9\u6cd5\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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