Java Enum

public enum EnumColumn {
  key1(valve1), key2(valve2), key3(valve2);

  private String type;

  EnumColumn(String type) {
    this.type = type;
  }

  
  public String () {
    return String.valueOf(this.type);
  }
}
  
public static void main(String[] args) {

  EnumColumn enumColumn1 = EnumColumn.valueOf(key1);
  EnumColumn enumColumn2 = EnumColumn.key2;
    
  System.out.println(groupColumn1.name());
  System.out.println(groupColumn1.toString());//valve1
  System.out.println(groupColumn1.type);//valve1
}