class Customer {
	private int accountNumber;
	private String firstName;
	private String lastName;
	private double outstandingBalance;

	public Customer(int an, String fn, String ln, double ob) {
		accountNumber = an;
		firstName = fn;
		lastName = ln;
		outstandingBalance = ob;
	}

	public int getAccountNumber() { return accountNumber; }
	public String getFirstName() { return firstName; }
	public String getLastName() { return lastName; }
	public double getOutstandingBalance() { return outstandingBalance; }

	public void setOutstandingBalance(double newBalance) {
		outstandingBalance = newBalance;
	}

	public String toString() {
		return accountNumber + "," + 
			firstName + "," +
			lastName + "," +
			outstandingBalance;
	}
} // End of class