string-Java枚舉的使用的問題

Java枚舉的使用的問題

教材裡面有段關於枚舉的代碼，但一直報錯，麻煩高手看一下

import java.util. *;
public class EnumTest {

    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        System.out.print("請輸入服裝型號:(SMALL,MEDIUM,LARGE,EXTRA_LARGE,EXTRA_EXTRA_LARGE)");
        String input=in.next().toUpperCase();
        Size size=Enum.valueOf(Size.class,input);
        System.out.println("Size="+size);
        System.out.println("abbreviation="+size.getAbbreviation());
        if(size==Size.EXTRA_LARGE^size==Size.EXTRA_EXTRA_LARGE)
            System.out.println("很好，你注意到了下劃線");

    }
    public static String abbreviation;
    enum Size{SMALL,MEDIUM,EXTRA_LARGE,EXTRA_EXTRA_LARGE}
    private void Size(String abbreviation){this.abbreviation=abbreviation;}
    public String getAbbreviation(){return abbreviation;}
}

最佳回答：

像這樣：
enum Size{SMALL,MEDIUM,EXTRA_LARGE,EXTRA_EXTRA_LARGE;

public String getAbbreviation() {
    // TODO Auto-generated method stub
    return abbreviation;
}
}