checkingaccount.java

本程序用Java语言描述了一个基本的银行管理系统

package banking.domain;

public class CheckingAccount extends Account {
	private double overdraftProtection;
	
	public CheckingAccount(double balance){
		super(balance);
		this.overdraftProtection = 0.0;
	}
	public CheckingAccount(double balance, double oP){
		super(balance);
		this.overdraftProtection = oP;
	}
	
	public void withdraw(double amt) throws OverdraftException{
		if (this.balance-amt>0.0){
			this.balance -= amt;
		}
		else if (this.overdraftProtection==0.0)
			throw new OverdraftException("No overdraft protection", amt-this.balance);
		else if (this.balance+this.overdraftProtection-amt>0.0){
			this.overdraftProtection -= (amt-this.balance);
			this.balance = 0.0;
		}
		else
			throw new OverdraftException("Insufficient funds for overdraft protection", amt-this.balance);
	}
	public double getOverdraftProtection(){
		return this.overdraftProtection;
	}
}