Enum reverse map Java

Since there was a purpose to reverse Enum itself from the value of Enum, I will leave it as a memorandum.

Implementation example in Enum with String value as value

public enum Mode {
   MODEA("a"),
   MODEB("b");

   private String mode;

   private Mode(String mode) {
       this.mode = mode;
   }

   /**Create a reverse map in advance and bring it in the field*/
   private static final Map<String, Mode> modeMap = new HashMap<String, Mode>() {
      private static final long serialVersionUID = 1L;
      {
           for (Mode mode : Mode.values()) {
               put(mode.mode, mode);
           }
       }
   };

   /**Get Enum from value*/
   public static Mode getMode(String mode) {
       return modeMap.get(mode);
   }
}

User side

Mode modeA = Mode.getMode("a");

You can create a reverse map in advance and get an Enum using String as a key. Since it is a map, it can be accessed directly and processing efficiency is good.

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