class Customer {

	private String firstName;
	private String lastName;
	private int accountNumber;
	private double outstandingBalance;

	public Customer(String f, String l, int a, double o) {
		firstName = f;
		lastName = l;
		accountNumber = a;
		outstandingBalance = o;
	}

	public int getAccountNumber() {
		return accountNumber;
	}

	public void setAccountNumber(int a) {
		accountNumber = a;
	}

	@Override
	public String toString() {
		String s = firstName + "," +
				lastName + "," + 
				accountNumber + "," +
				outstandingBalance;

		return s;
	} 

	@Override
	public boolean equals(Object obj) {
		if(!(obj instanceof Customer)) {
			return false;
		}
	
		Customer o = (Customer) obj;

		return accountNumber == o.getAccountNumber();
	}
}  // end of class