<< 2006Customer | APQuestionsTrailIndex | 2005Tickets >>

Question from the College Board

Reservation.java

public class Reservation 
{
	private String guestName;
	private int roomNumber;
    public Reservation(String guestName, int roomNumber){
    		this.setGuestName(guestName);
    		this.setRoomNumber(roomNumber);
    }
	public void setGuestName(String guestName) {
		this.guestName = guestName;
	}
	public String getGuestName() {
		return guestName;
	}
	public void setRoomNumber(int roomNumber) {
		this.roomNumber = roomNumber;
	}
	public int getRoomNumber() {
		return roomNumber;
	}
	public String toString(){
		return "Guest: "+this.getGuestName()
				+" Room: "+this.getRoomNumber();
	}
}

Hotel.java

import java.util.ArrayList;
public class Hotel 
{
	private Reservation[] rooms;
	private ArrayList waitList;
	public Hotel(int numberOfRooms) {
		rooms=new Reservation[numberOfRooms];
		waitList = new ArrayList();
	}
	public Reservation requestRoom(String guestName){
		/* to be implemented in part (a) */
		return null;
	}
	public Reservation cancelAndResassign(Reservation res){
		/* to be implemented in part (b) */
		return null;
	}
	public void report(){
		System.out.println("Rooms:");
		for (int i=0; i<rooms.length;i++){
			if (rooms[i]==null)
				System.out.println("Room "+i+": empty");
			else
				System.out.println(rooms[i]);
		}
		System.out.println("Waiting List:");
		if (waitList.size()==0){
			System.out.println("empty");
		} else for (Object n:waitList){
			System.out.println((String)n);
		}
	}
}

HotelTester.java

public class HotelTester 
{
	public static void main(String[] args){
		Hotel hotel=new Hotel(5);
		hotel.report();
		System.out.println("above should be empty");
		Reservation a= hotel.requestRoom("Alice");
		Reservation b=hotel.requestRoom("Bob");
		Reservation c=hotel.requestRoom("Clare");
		Reservation d=hotel.requestRoom("Dan");
		Reservation e=hotel.requestRoom("Ed");
		Reservation f=hotel.requestRoom("Fred");
		hotel.requestRoom("Greg");
		hotel.report();
		System.out.println("above should be full with 2 waiting");
		if (f==null){
			System.out.println("f is null as it should be");
		}else{
			System.out.println("Error: f is not null as it should be");
		}
		Reservation g=hotel.cancelAndResassign(c);
		Reservation h=hotel.cancelAndResassign(d);
		Reservation i=hotel.cancelAndResassign(e);
		hotel.report();
		System.out.println("Fred should be in room 2, Clare should not be in the list");
		System.out.println("Greg should be in room 3, Dan should not be in the list");
		System.out.println("Room 4 should be empty");
		if (i==null){
			System.out.println("i is null as it should be");
		}else{
			System.out.println("Error: i is not null as it should be");
		}

	}
}