学习练习 java面向对象存取款查询余额

 1 package com.hanqi;
 2 
 3 public class Account {
 4 
 5     String ZhangHao;
 6     
 7     double CunKuanYuE;
 8     
 9     Account(String ZhangHao,double CunKuanYuE)
10     {
11         //初始化
12         this.ZhangHao = ZhangHao;
13         this.CunKuanYuE = CunKuanYuE;
14     }
15     
16     //存款
17     //无返回值带参数的方法
18     void cunKuan (double qianshu)
19     {
20         System.out.println("存了" + qianshu);
21         this.CunKuanYuE += qianshu;
22     }
23     
24     //取款
25     //无返回值带参数的方法
26     void quKuan (double qianshu)
27     {
28         System.out.println("取了" + qianshu);
29         this.CunKuanYuE -= qianshu;
30     }
31     //查询余额
32     //有返回值无参数的方法
33     
34     double getYuE()
35     {
36         return this.CunKuanYuE;
37     }
38     
39     
40     public static void main(String[] args)
41     {
42         Account ac = new Account("123456",1000);
43         
44         ac.cunKuan(100);
45         System.out.println("查询余额=" + ac.getYuE());
46         
47         ac.quKuan(300);
48         System.out.println("查询余额=" + ac.getYuE());
49         
50     }
51     
52 }