package Dec2016;  

public class Ques1206 {  

   public static void main(String[] args){

       doSex(null);

   }  

    public static void doSex(Sex sex){

        switch (sex) {

          case Boy:

            System.out.println("男的");

            break;

          case Girl:

            System.out.println("女的");

            break;

          default:

            System.out.println("出错");

            break;

        }

    }

}  

enum Sex{

    Boy("男"), Girl("女");

    private String sex;  

    Sex(String sex) {

        sex = sex;

    }

}