【Java每日一题】20161206

20161205问题解析请点击今日问题下方的“【Java每日一题】20161206”查看

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;
    }
}

今日问题：
请问主程序能否正常运行输出结果？（点击以下“【Java每日一题】20161206”查看20161205问题解析）

题目原发布于公众号、简书：[url=http://mp.weixin.qq.com/s?__biz=MzI4ODEyMTgwMA==&mid=2650163292&idx=1&sn=45e2225c28d4bbc2b6d619327b4f78dd&chksm=f3c1defbc4b657ed516a44c625d60ac0c14535d425efe0ec4f309338626479a9cc0909f5e1d0#rd]【Java每日一题】20161206[/url]，[url=http://www.jianshu.com/p/47081d535023]【Java每日一题】20161206 [/url]

[img]https://img-blog.youkuaiyun.com/20161017115128961?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast[/img]