public class CheckingAccount extends BankAccount {
	private double monthlyFee = 5.95;
	private AccountFee fee;
	
	public CheckingAccount(double deposit) {
		super();
		if( deposit >= 1000.0 ) {
			fee = new NoFee();
		} else {
			fee = new MonthlyFee();
		} // end if
		makeDeposit(deposit);
	} // end CheckingAccount
	
	public void calculateFee() {
		subtractFromBalance(fee.accountFee());
		addToStatement(fee + "");		
	} // end calculateFee
		
	public void setMonthlyFee(double amount) {
		monthlyFee = amount;
	} // end setMonthlyFee
	
	public double getMonthlyFee() {
		return monthlyFee;
	} // end getMonthlyFee
	
	public boolean makeWithdrawal(double amount) {
		boolean OK = super.makeWithdrawal(amount);
		if( !OK ) return false;
		double balance = getBalance();
		if( balance < 1000.0 ) {
			fee = new MonthlyFee();
		} // end if
		return true;
	} // end makeWithdrawal
	
	private interface AccountFee {
		public double accountFee();
	}
	
	private class NoFee implements AccountFee {		
		public double accountFee(){
			return 0.0;
		} // end accountFee
		public String toString() {
			return "";
		} // end toString					
	} // end NoFee
	
	private class MonthlyFee implements AccountFee {		
		public double accountFee(){
			return monthlyFee;
		} // end accountFee
		public String toString() {
			return "Fee: " + accountFee() + "\nNew balance: " + getBalance() + "\n";
		}// end toString()
	} // end MonthlyFee
	
} // end CheckingAccount