public class Customer {
    private String	firstName;
    private String	lastName;
    private Address	address;
    private String	phoneNumber;

	// This is the zero-parameter constructor
    public Customer() {
        firstName = "UNKNOWN";
        lastName = "UNKNOWN";
        address = null;
	  phoneNumber = "(???)???-????";
    }

    // This is a 4-parameter constructor
    public Customer (String f, String l, Address a, String p) {
        firstName = f;
        lastName = l;
        address = a;
	  phoneNumber = p;
    }

	// These are the get/set methods
	public String getFirstName() { return firstName; }
	public String getLastName() { return lastName; }
	public Address getAddress() { return address; }
	public String getPhoneNumber() { return phoneNumber; }
	public void setFirstName(String s) { firstName = s; }
	public void setLastName(String s) { lastName = s; }
	public void setAddress(Address a) { address = a; }
	public void setPhoneNumber(String p) { phoneNumber = p; }

	// This returns a String representation of the customer
	public String toString() {
		return "Customer: " + firstName + " " + lastName +
			    " living at " + address;
	}
}