ATM机java代码练习题

import java.util.*;
/**
 * ATM机java代码
 * 
 * @author (webkfa) 
 * @version (webkfa.com)
 */
public class Account
{
   public static void main(String[] args)
   {
       int m = 0;
       boolean existed = false;
       while (true)
       {
           //显示主菜单
           m = displayMenu();
           switch (m)
           {
           case 1:
              //使用Account存款功能
               break;
           case 2 :
              //使用Account取款功能
              break;
           case 3:
              //使用Account查询余额功能
              break;
           case 4:
              //new Account
              break;
           case 5 :
              //使用Account销户功能
              break;
           case 0:
              existed = true;
              break;
           default:
           //报错，提示重新输入
        }
        
        if (existed)
        {
             System.out.println("====================退出成功!!!====================");
            break;
        }
    }
}

   public static int displayMenu()
   {
       System.out.println("====================欢迎使用ATM自助机====================");
       System.out.println("1 - 存款");
       System.out.println("2 - 取款");
       System.out.println("3 - 查询余额");
       System.out.println("4 - 开户");
       System.out.println("5 - 销户");
       System.out.println("0 - 退出");
       System.out.print("请选择:");
       Scanner in = new Scanner(System.in);
       int result = in.nextInt();
       return result;
    }
   
}