java如何clone枚举成员？

Question

在java中，可以通过重写类极其成员的clone函数达到deep clone的目的。但是，如果当一个类有一个枚举类型的成员时，该如何克隆此枚举成员？

比如类

public class Student{
    public Gender gender;
}

public enum Gender{
    MAN,WOMAN;
}

该如何实现对该类实例的克隆？

更新

目前的做法是：

@Override
protected Object clone() throws CloneNotSupportedException MyException{
    Student tmp = (Student) super.clone();
    switch(this.gender){
        case MAN:
            tmp.gender =Gender.MAN;    
            break;
        case WOMAN:
            tmp.gender = Gender.WOMAN;
            break;    
        default:
            throw new MyException("不支持的性别值");
    }
    return tmp;
}

Answer 1

    @Override
    protected Student clone() throws CloneNotSupportedException {
        return (Student) super.clone();
    }

enum Gender 只能有两个实例, 所以只能 复制对其的引用.

http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#clone%28%29

Otherwise, this method creates a new instance of the class of this
object and initializes all its fields with exactly the contents of the
corresponding fields of this object, as if by assignment;

所以不需要再额外赋值了.

Answer 2

https://www.cnblogs.com/today...
理解: 不需要管enum 的clone(), 底层是单例
实在不放心, 可以存储 enum.man.ordinal() ;这样就啥也不用考虑了