if else的结构唉，望老师同学帮一下忙

程序走到这里，是不是一定会执行if或else，而且不管是执行if还是else，是不是必然的要返回结果呀？所以它下面的语句永远不会被执行到，所以程序在编译时就报错了。正确的做法是把那个else相关的去掉。祝：学习愉快

Test.java
package com.imooc;

public class Test {

 public static void main(String[] args) {
      // TODO Auto-generated method stub
       User one=new User("Lucy","123456");
      User two=new User("Mike","123456");
      System.out.println("用户名:"+one.getName());
      System.out.println("密码:"+one.getMima());
      System.out.println("用户名:"+two.getName());
      System.out.println("密码:"+two.getMima());
      System.out.println("==================");
      UserManager um=new UserManager();
      System.out.println(um.checkUser(one,two));
 }
}
User.java
package com.imooc;

public class User {
          private String user;
         private String mima;
         public User(String user,String mima){
             this.setName(user);
             this.setMima(mima);
         }
         public void setName(String user){
             this.user=user;
         }
         public String getName(){
             return this.user;
         }
         public void setMima(String mima){
             this.mima=mima;
         }
         public String getMima(){
             return this.mima;
         }
}
UserManager.java
package com.imooc;

public class UserManager {
     public String checkUser(User one, User two) {
            // 判断用户名是否为空，是否一致
      if(one.getName()==null||two.getName()==null)
           return "用户名不能为空";
      if(one.getName().equals(two.getName())){
            return "用户名一致";
      }
         else {
          return "用户名不一致";
      }
      if(one.getMima()==null||two.getMima()==null)
           return "密码不能为空";
      if(one.getMima().equals(two.getMima())){
           return "密码一致";
      }
      else {
           return "密码不一致";
      }
    }
}