public class Credit extends Account{
	int creditLine;  //The total amount of money they may have access to.
	double interest;  //The APR at which they are charged
	
	public Credit(int accountNum, int balance, String name,
			int creditLine, double interest){
		super(accountNum, balance, name);
		this.creditLine = creditLine;
		this.interest = interest;
		
	}
	
	//Pay off your credit card bill with a certain amount.  
	//Return the new balance.
	public int deposit(int amount){
		if(balance - amount < 0){
			throw new RuntimeException("Cannot have a credit on your account.");
		}else{
			return balance = balance - amount;
		}
	}

	//Spend more money on your credit
	public int withdraw(int amount){
		if(balance + amount > creditLine){
			throw new RuntimeException("Cannot spend above your credit line.");
		}else{
			return balance = balance + amount;
		}
	}
}