java编程新账户类(Newaccount)(java继承)
可记录多次存取信息
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import java.util.ArrayList;
import java.util.Date;
import java.util.Scanner;//声明
public class TestNewaccount //测试类
{
public static void main(String[] args)
{
NewAccount account = new NewAccount("Mike",1122,1000);
account.setAnnualInterestRate(1.5/100);
account.deposit(30);
account.deposit(40);
account.deposit(50);
account.withDraw(5);
account.withDraw(4);
account.withDraw(2);
for(int i=0;i=money)
balance-=money;
}
public void deposit(double money)
{
balance+=money;
}
}
class Transaction//用户交易信息类
{
private char type;
private Date date;
private double money;
private double balance;
private String description;
public Transaction(char type,double money,double balance,String description)
{
this.type=type;//交易类型(取款,存款)
date=new Date();//时间
this.money=money;//存取的多少
this.balance=balance;//交易完还剩多少钱
this.description=description;//交易备注
}
public String toString()
{
return "Type:"+type+" Money:"+money+" Balance:"+balance+" Date:"+date+" "+description;
}
}
class NewAccount extends Account//子类
{
private String name;//新增变量
ArrayList transaction=new ArrayList();//ArrayList方法
public NewAccount(String name,int id,double balance)
{
super(id,balance);
this.name=name;
}
public void withDraw(double x)//取钱
{
if(getBalance()>x)
{
setBalance(getBalance()-x);
transaction.add(new Transaction('W',x,getBalance(),""));//往ArrayList方法中加元素
}
}
public void deposit(double x)//存钱
{
setBalance(getBalance()+x);
transaction.add(new Transaction('D',x,getBalance(),""));
}
}
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