Basic Localization with Enum with class bodies for constants

import java.util.Locale;
import java.util.ResourceBundle;


public class MerLocalizedEnum {

    /**In this class, I'm going to localize an enum.
     * Place MerLocBundle.properties and MerLocBundle_sp_MX.properties in base directory of
     * source.
     * @author Meredith
     */
    public MerLocalizedEnum() {

        Locale.setDefault(new Locale("sp","MX"));
        for(AnimalEnum ae:AnimalEnum.values()){
            System.out.println(ae.toString());
        }
        Locale.setDefault(new Locale("en","US"));
        for(AnimalEnum ae:AnimalEnum.values()){
            System.out.println(ae.toString());
        }

    }
    public static void main(String[] args)
    {
        MerLocalizedEnum mle = new MerLocalizedEnum();
    }
    enum AnimalEnum{
        DOG{
            @Override
            public String getStringRep(ResourceBundle animalNames){
                return animalNames.getString("DOG");
            }
            },
        CAT{
            @Override
            public String getStringRep(ResourceBundle animalNames){
                return animalNames.getString("CAT");
            }
            },
        BIRD{
            @Override
            public String getStringRep(ResourceBundle animalNames){
                return animalNames.getString("BIRD");
            }
            };

        private AnimalEnum()
        {

        }

        public abstract String getStringRep(ResourceBundle animalNames);
        @Override
        public String toString()
        {
            ResourceBundle animNames = ResourceBundle.getBundle("MerLocBundle",Locale.getDefault());
            return this.getStringRep(animNames);
        }
    }

}

/*Sample output:
"Perro"
"Gato"
"Pájaro"
"Dog"
"Cat"
"Bird"
*/

/*Properties files:
 MerLocBundle.properties:
DOG="Dog"
CAT="Cat"
BIRD="Bird"
 MerLocBundle_sp_MX.properties:
DOG="Perro"
CAT="Gato"
BIRD="Pájaro"
*/