求帮忙写个类啊

[bshedu5]

创建3个类，其中Account类用来模拟银行账户，每个银行账户包括属性：账户号、余额、年利率、开户时间，并有取款（withdraw）和存款（deposit）方法。在此基础上，创建2个子类，分别为支票账户（checking account）和储蓄账户（saving account）。支票账户有一定的透支额，储蓄账户不能透支。实现这几个类，并书写一个测试程序，创建Account, SavingsAccount, 和 CheckingAccount对象，并调用它们的toString（）方法。

[小V小V志]

好了。。。发不上去

[CN_Anyoo]

lx继续

[安特矮油]

package t;

import java.util.Date;

public abstract class Account {

	private String cardNo;
	private double balance;
	private double interestRate;
	private Date createDate;
	public String getCardNo() {
		return cardNo;
	}
	public void setCardNo(String cardNo) {
		this.cardNo = cardNo;
	}
	public double getBalance() {
		return balance;
	}
	public void setBalance(double balance) {
		this.balance = balance;
	}
	public double getInterestRate() {
		return interestRate;
	}
	public void setInterestRate(double interestRate) {
		this.interestRate = interestRate;
	}
	public Date getCreateDate() {
		return createDate;
	}
	public void setCreateDate(Date createDate) {
		this.createDate = createDate;
	}
	
	public abstract double withdraw(double money);
	public abstract void deposit(double money);
	
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		long temp;
		temp = Double.doubleToLongBits(balance);
		result = prime * result + (int) (temp ^ (temp >>> 32));
		result = prime * result + ((cardNo == null) ? 0 : cardNo.hashCode());
		result = prime * result
				+ ((createDate == null) ? 0 : createDate.hashCode());
		temp = Double.doubleToLongBits(interestRate);
		result = prime * result + (int) (temp ^ (temp >>> 32));
		return result;
	}
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		final Account other = (Account) obj;
		if (Double.doubleToLongBits(balance) != Double
				.doubleToLongBits(other.balance))
			return false;
		if (cardNo == null) {
			if (other.cardNo != null)
				return false;
		} else if (!cardNo.equals(other.cardNo))
			return false;
		if (createDate == null) {
			if (other.createDate != null)
				return false;
		} else if (!createDate.equals(other.createDate))
			return false;
		if (Double.doubleToLongBits(interestRate) != Double
				.doubleToLongBits(other.interestRate))
			return false;
		return true;
	}
	@Override
	public String toString() {
		return super.toString();
	}
}

[安心逍遥]

呵呵，有人写好了

[安特矮油]

package t;

public class CheckingAccount extends Account{

	public CheckingAccount(double overdraft){
		setOverdraft(overdraft);
	}
	
	private double overdraft;
	
	public double getOverdraft() {
		return overdraft;
	}

	public void setOverdraft(double overdraft) {
		this.overdraft = overdraft;
	}

	@Override
	public void deposit(double money) {
		setBalance(getBalance() + money);
	}

	@Override
	public double withdraw(double money) {
		double balance = getBalance();
		if(money > balance + overdraft){
			System.out.println("余额不足！");
			return 0;
		}
		setBalance(balance - money);
		return money;
	}

}

[安特矮油]

package t;

public class SavingAccount extends Account{

	@Override
	public void deposit(double money) {
		setBalance(getBalance() + money);
	}

	@Override
	public double withdraw(double money) {
		double balance = getBalance();
		if(money > balance){
			System.out.println("余额不足！");
			return 0;
		}
		setBalance(balance - money);
		return money;
	}

}

[安特矮油]

package t;

import java.util.Date;

public class Test {

	public static void main(String[] args) {
		Account a1 = new CheckingAccount(1000.00);
		a1.setBalance(1000.00);
		a1.setCardNo("000001");
		a1.setCreateDate(new Date());
		a1.setInterestRate(0.03);
		a1.deposit(1000.00);
		a1.withdraw(4000);
		
		Account a2 = new SavingAccount();
		a2.setBalance(1000.00);
		a2.setCardNo("000002");
		a2.setCreateDate(new Date());
		a2.setInterestRate(0.03);
		a2.deposit(1000.00);
		a2.withdraw(4000);
		
	}
}

[snowboy8886]

银行里的数据一般用的是BigDecimal类型