{"id":27790,"date":"2024-03-16T09:15:09","date_gmt":"2024-03-16T09:15:09","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-use-enum-types-in-java\/"},"modified":"2024-03-22T11:53:29","modified_gmt":"2024-03-22T11:53:29","slug":"how-to-use-enum-types-in-java","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-use-enum-types-in-java\/","title":{"rendered":"How to use enum types in Java?"},"content":{"rendered":"

In Java, an enumeration type (Enum) is a special data type used to define a fixed set of values. Here is the basic syntax and usage of using Java enumeration types.<\/p>\n

    \n
  1. Define an enumeration type:<\/li>\n<\/ol>\n
    enum<\/span> Color<\/span> {\r\n  RED, GREEN, BLUE\r\n}\r\n<\/code><\/pre>\n
      \n
    1. Utilizing values of an enumeration type:<\/li>\n<\/ol>\n
      Color<\/span> color<\/span> =<\/span> Color.RED;\r\n<\/code><\/pre>\n
        \n
      1. Compare the values of enumerated types:<\/li>\n<\/ol>\n
        if<\/span> (color == Color.RED) {\r\n  \/\/ \u6267\u884c\u4ee3\u7801<\/span>\r\n}\r\n<\/code><\/pre>\n
          \n
        1. Iterate through all values of an enumeration type:<\/li>\n<\/ol>\n
          for<\/span> (Color c : Color.values()) {\r\n  System.out.println(c);\r\n}\r\n<\/code><\/pre>\n
            \n
          1. Match the enum type values using a switch statement.<\/li>\n<\/ol>\n
            switch<\/span> (color) {\r\n  case<\/span> RED:\r\n    \/\/ \u6267\u884c\u4ee3\u7801<\/span>\r\n    break<\/span>;\r\n  case<\/span> GREEN:\r\n    \/\/ \u6267\u884c\u4ee3\u7801<\/span>\r\n    break<\/span>;\r\n  case<\/span> BLUE:\r\n    \/\/ \u6267\u884c\u4ee3\u7801<\/span>\r\n    break<\/span>;\r\n  default<\/span>:\r\n    \/\/ \u6267\u884c\u4ee3\u7801<\/span>\r\n    break<\/span>;\r\n}\r\n<\/code><\/pre>\n
              \n
            1. Add custom properties and methods to an enumeration type.<\/li>\n<\/ol>\n
              enum<\/span> Color<\/span> {\r\n  RED(\"#FF0000\"<\/span>), GREEN(\"#00FF00\"<\/span>), BLUE(\"#0000FF\"<\/span>);\r\n\r\n  private<\/span> String code;\r\n\r\n  private<\/span> Color<\/span>(String code)<\/span> {\r\n    this<\/span>.code = code;\r\n  }\r\n\r\n  public<\/span> String getCode<\/span>()<\/span> {\r\n    return<\/span> code;\r\n  }\r\n}\r\n\r\nColor<\/span> red<\/span> =<\/span> Color.RED;\r\nSystem.out.println(red.getCode());  \/\/ \u8f93\u51fa: #FF0000<\/span>\r\n<\/code><\/pre>\n
              In conclusion:<\/p>\n
                \n
              1. Enumerated types can be used to define a set of constant values.<\/li>\n
              2. Variables of enumeration type can only be assigned one value from the enumeration type.<\/li>\n
              3. Values of enumeration types can be compared using comparison operators.<\/li>\n
              4. The values of an enumerated type can be retrieved through the values() method for iteration.<\/li>\n
              5. Enum values can be matched using a switch statement.<\/li>\n
              6. Enumerated type can define custom properties and methods.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
                In Java, an enumeration type (Enum) is a special data type used to define a fixed set of values. Here is the basic syntax and usage of using Java enumeration types. Define an enumeration type: enum Color { RED, GREEN, BLUE } Utilizing values of an enumeration type: Color color = Color.RED; Compare the values […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-27790","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nHow to use enum types in Java? - 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\/blog\/how-to-use-enum-types-in-java\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to use enum types in Java?\" \/>\n<meta property=\"og:description\" content=\"In Java, an enumeration type (Enum) is a special data type used to define a fixed set of values. 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