{"id":119626,"date":"2024-03-23T19:20:17","date_gmt":"2024-03-23T10:20:17","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7contains%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9\/"},"modified":"2024-04-05T02:25:01","modified_gmt":"2024-04-04T17:25:01","slug":"java%e3%81%a7contains%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7contains%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9\/","title":{"rendered":"java\u3067contains\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9"},"content":{"rendered":"

Java\u3067\u306f\u3001`contains`\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6307\u5b9a\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u4f7f\u3044\u65b9\u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u578b\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3044\u304f\u3064\u304b\u306e\u4e00\u822c\u7684\u306a\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u578b\u306e`contains`\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u7528\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n

    \n
  1. \u914d\u5217\u30ea\u30b9\u30c8<\/li>\n<\/ol>\n
    ArrayList<String> list = new ArrayList<>();\r\nlist.add(\"apple\");\r\nlist.add(\"banana\");\r\nlist.add(\"orange\");\r\nboolean result = list.contains(\"apple\");\r\nSystem.out.println(result);  \/\/ \u8f93\u51fa\uff1atrue\r\n<\/code><\/pre>\n
      \n
    1. \u30ea\u30f3\u30af\u30ea\u30b9\u30c8\uff1a<\/li>\n<\/ol>\n
      LinkedList<String> list = new LinkedList<>();\r\nlist.add(\"apple\");\r\nlist.add(\"banana\");\r\nlist.add(\"orange\");\r\nboolean result = list.contains(\"apple\");\r\nSystem.out.println(result);  \/\/ \u8f93\u51fa\uff1atrue\r\n<\/code><\/pre>\n
        \n
      1. \u30cf\u30c3\u30b7\u30e5\u30bb\u30c3\u30c8<\/li>\n<\/ol>\n
        HashSet<String> set = new HashSet<>();\r\nset.add(\"apple\");\r\nset.add(\"banana\");\r\nset.add(\"orange\");\r\nboolean result = set.contains(\"apple\");\r\nSystem.out.println(result);  \/\/ \u8f93\u51fa\uff1atrue\r\n<\/code><\/pre>\n
          \n
        1. TreeSet\uff1a<\/li>\n<\/ol>\n
          TreeSet<String> set = new TreeSet<>();\r\nset.add(\"apple\");\r\nset.add(\"banana\");\r\nset.add(\"orange\");\r\nboolean result = set.contains(\"apple\");\r\nSystem.out.println(result);  \/\/ \u8f93\u51fa\uff1atrue\r\n<\/code><\/pre>\n
          HashMap \u3084 TreeMap \u3068\u3044\u3063\u305f\u307b\u304b\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u578b\u3067\u3082\u3001 contains \u30e1\u30bd\u30c3\u30c9\u306f\u540c\u69d8\u306e\u4f7f\u3044\u65b9\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001 contains \u30e1\u30bd\u30c3\u30c9\u306f equals \u30e1\u30bd\u30c3\u30c9\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u7b49\u4fa1\u6027\u3092\u6bd4\u8f03\u3059\u308b\u305f\u3081\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u5185\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c equals \u30e1\u30bd\u30c3\u30c9\u3092\u6b63\u3057\u304f\u5b9f\u88c5\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
          Java\u3067\u306f\u3001`contains`\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6307\u5b9a\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5b58\u5728\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u4f7f\u3044\u65b9\u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u578b\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3044\u304f\u3064\u304b\u306e\u4e00\u822c\u7684\u306a\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u578b\u306e` […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-119626","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\njava\u3067contains\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9 - 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