Java学习之Account类

清疚 2022-11-17 10:16 270阅读 0赞

**案例介绍：**

定义一个名为Account的类实现账户管理，它的UML图如下图所示：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NzA2MjkwNw_size_16_color_FFFFFF_t_70_pic_center]

编写一个应用程序测试Account的类的使用。

**案例代码：**

import java.util.Date;
    public class Account{
        
    	private int id;	
    	private double balance;
    	private double annulInterestRate;
    	private Date dateCreated;
    	public Account(){
        
    		super();
    	}
    	public Account(int id, double balance){
        
    	super();
    	this.id = id;
    	this.balance = balance;
    	dateCreated = new Date();
    	}
    	public int getId(){
        
    		return id;
    	}
    	public void setId(int id){
        
    		this.id = id;
    	}
    	public double getBalance(){
        
    		return balance;
    	}
    	public void setBalance(double balance){
        
    		this. balance = balance;
    	}
    	public double getAnnulInterestRate(){
        
    		return annulInterestRate;
    	} 
    	public void setAnnulInterestRate(double annulInterestRate){
        
    		this.annulInterestRate = annulInterestRate;
    	}
    	public Date getDateCreated(){
        
    		return dateCreated;
    	}
    	public void withdraw(double amount){
        
    		balance = balance - amount;
    	}
    	public void deposit(double amount){
        
    		balance = balance + amount;
    	}
    	public static void main( String[ ] args){
        
    		Account myAccount = new Account( 101,1000.00);
    		myAccount.deposit( 100);
    		myAccount.withdraw( 200) ;
    		System.out.println("The balance = " + myAccount.getBalance());
    
    	}
    }

**案例运行图：**  
![在这里插入图片描述][2021040909264092.png_pic_center]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NzA2MjkwNw_size_16_color_FFFFFF_t_70_pic_center]: /images/20221022/2b8347c94a1047348fb45187bb5248d2.png
[2021040909264092.png_pic_center]: /images/20221022/82f68ce4cb1549ea888aaba298a62316.png