java编写账户（余额，月利息，开户日期）

import java.util.Date;

public class TestAccount //测试类
{
    public static void main(String[] args) 
    {
        Account c1=new Account(1122,20000);
        c1.setAnnualInterestRate(4.5/100);
        c1.withDraw(2500);
        c1.deposit(3000);
        System.out.println("余额为"+c1.getBalance());
        System.out.println("月利息为"+c1.getMonthlyInterest()+'%');
        System.out.println("开户日期是"+c1.getDateCreated().toString());
    }
}
class Account //功能类
{
    private int id;
    private double balance;
    private double annualInterestRate;
    private Date dateCreated;
    public Account()
    {
        dateCreated=new Date();
    }
    public Account(int x,double y)
    {
        id=x;
        balance=y;
        dateCreated=new Date();
    }
    public void setid(int x)
    {
        id=x;
    }
    public int getId()
    {
        return id;
    }
    public void setBalance(double x)
    {
        balance=x;
    }
    public double getBalance()
    {
        return balance;
    }
    public void setAnnualInterestRate(double x)
    {
        annualInterestRate=x;
    }
    public double getAnnualInterestRate()
    {
        return annualInterestRate;
    }
    public Date getDateCreated()
    {
        return dateCreated;
    }
    public double getMonthlyInterestRate()
    {
        return annualInterestRate/12;
    }
    public double getMonthlyInterest()
    {
        return getMonthlyInterestRate()*balance;
    }
    public void withDraw(double money)
    {
        if(balance>=money)
        balance-=money;
    }
    public void deposit(double money)
    {
        balance+=money;
    }
}