public enum SizeEnum {

     SMALL,

     BIG,

     BIGEST

};

public enum SizeStringEnum {

    SMALL("小"),

    BIG("大"),

    BIGEST("巨大");

    private String strSizeString;

    public String toString() {

        return strSizeString;

    }

     private SizeStringEnum(String str) {

        this.strSizeString = str;

    }

}

//1、

        SizeStringEnum sizeStringEnum=SizeStringEnum.BIG;

        for(SizeStringEnum size: sizeStringEnum.values())

        {

             System.out.println(size);

        }

//2、

           for(SizeStringEnum size:     SizeStringEnum.values())

        {

             System.out.println(size);

        }

        sizeStringEnum=Enum.valueOf(SizeStringEnum.class, "BIG");