学习练习 java面向对象存取款查询余额

 package com.hanqi;
 
 public class Account {
 
     String ZhangHao;
 
     double CunKuanYuE;
 
     Account(String ZhangHao,double CunKuanYuE)
     {
         //初始化
         this.ZhangHao = ZhangHao;
         this.CunKuanYuE = CunKuanYuE;
     }
 
     //存款
     //无返回值带参数的方法
     void cunKuan (double qianshu)
     {
         System.out.println("存了" + qianshu);
         this.CunKuanYuE += qianshu;
     }
 
     //取款
     //无返回值带参数的方法
     void quKuan (double qianshu)
     {
         System.out.println("取了" + qianshu);
         this.CunKuanYuE -= qianshu;
     }
     //查询余额
     //有返回值无参数的方法
 
     double getYuE()
     {
         return this.CunKuanYuE;
     }
 
     public static void main(String[] args)
     {
         Account ac = new Account("123456",1000);
 
         ac.cunKuan(100);
         System.out.println("查询余额=" + ac.getYuE());
 
         ac.quKuan(300);
         System.out.println("查询余额=" + ac.getYuE());
 
     }
 
 }