【Java 基础实例—Bank 项目1】

(上图Wie任务要求的UML结构)

Account.java 文件:

 1 package Banking_1;
 2 
 3 public class Account {
 4     private double balance;//余额  ,uml前该变量是 '-'
 5     public Account(double init_balance){
 6         balance=init_balance;
 7     }
 8     public double getBalance() {
 9         return balance;
10     }
11     //存钱
12     public void deposit(double amt){
13         this.balance+=amt;
14     }
15     //取钱
16     public void withdraw(double amt){
17         this.balance-=amt;
18     }
19 
20 }

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