adding method in an enum class

import java.io.Serializable;

public enum EnumValues implements Serializable {
   BALAJI("BALAJI"),
   BANG_AND_JANG_KUTTIES("THEY ARE THE WORLD'S GREATEST KUTTIES");

   private String displayName;
 
   private EnumValues(String displayName) {
      this.displayName = displayName;
   }
   public static EnumValues fromString(String bang_and_jang_kutties) {
       return BANG_AND_JANG_KUTTIES;
   }
   public static EnumValues getvalues() {
       return BANG_AND_JANG_KUTTIES;
   }
   public static void main(String[] args) {
   EnumValues[] array = EnumValues.values();
   System.out.println(array[0] +" "+ array[1]);
   System.out.println(EnumValues.getvalues());
   System.out.println(EnumValues.fromString("The Best"));
   }
}