Search A Vector

[Ross McManus]

I am creating a Hotel Booking System.

On my Assignment sheet on the Button Events part it says.

" If the source of a button event is 'BOOK SINGLE ROOM' or 'BOOK DOUBLE ROOM' the Vector of Rooms should be searched, over the range for bedrooms, to ensure that there is a vacant room of the requested type: otherwise a suitable message is displayed stating that there are no rooms available."

" If there is a vacant room (ie the getCustomer() method returns null) then the user is requested to input the name of the customer, and the room is booked using the bookRoom(String) method. The JLabel associated with the room is to show the text 'OCCUPIED'"

My question is how do I search a vector to see if there is a vacant room?

The code I have for the Hotel GUI class where I have created the Vector and added the Bedroom & MeetingRooms to it is

import java.awt.event.*;
import java.awt.*;
import java.util.*;
import javax.swing.border.Border;
import javax.swing.border.LineBorder;

import javax.swing.*;


public class HotelGUI extends JPanel implements ActionListener,MouseListener

{
        JLabel bedroom201,bedroom202,bedroom203,bedroom204,bedroom205,bedroom206;
        JLabel bedroom207,bedroom208,bedroom209,bedroom210, bedroom211,bedroom212;
        JLabel meetingroom101, meetingroom102, meetingroom103;

        JButton Single, Double, Meeting, Load, Save;

        private Vector <Room> hotel = new Vector <Room>();




        HotelGUI()
	{


        Bedroom b201 = new Bedroom(201, 35, "Single");
        hotel.add(b201);
        Bedroom b202 = new Bedroom(202, 35, "Single");
        hotel.add(b202);
        Bedroom b203 = new Bedroom(203, 35, "Single");
        hotel.add(b203);

        Bedroom b204 = new Bedroom(204, 60, "Double");
        hotel.add(b204);
        Bedroom b205 = new Bedroom(205, 60, "Double");
        hotel.add(b205);
        Bedroom b206 = new Bedroom(206, 60, "Double");
        hotel.add(b206);
        Bedroom b207 = new Bedroom(207, 60, "Double");
        hotel.add(b207);
        Bedroom b208 = new Bedroom(208, 60, "Double");
        hotel.add(b208);
        Bedroom b209 = new Bedroom(209, 60, "Double");
        hotel.add(b209);
        Bedroom b210 = new Bedroom(210, 60, "Double");
        hotel.add(b210);
        Bedroom b211 = new Bedroom(211, 60, "Double");
        hotel.add(b211);
        Bedroom b212 = new Bedroom(212, 60, "Double");
        hotel.add(b212);

        MeetingRoom m101 = new MeetingRoom(101, 120, 20);
        hotel.add(m101);
        MeetingRoom m102 = new MeetingRoom(201, 150, 25);
        hotel.add(m102);
        MeetingRoom m103 = new MeetingRoom(202, 250, 60);
        hotel.add(m103);




        JPanel main = new JPanel();
	this.setLayout(new BorderLayout());
	Border border = LineBorder.createBlackLineBorder();




	JPanel buttons = new JPanel();
	buttons.setLayout(new GridLayout(0, 1));
	this.add(buttons, BorderLayout.WEST);



	Single = new JButton("BOOK SINGLE ROOM");
	Double = new JButton("BOOK DOUBLE ROOM");
	Meeting = new JButton("BOOK MEETING ROOM");
	Load = new JButton("LOAD FILE");
	Save = new JButton("SAVE FILE");

	buttons.add(Single);
	buttons.add(Double);
	buttons.add(Meeting);
	buttons.add(Load);
	buttons.add(Save);

	Single.addActionListener(this);
	Double.addActionListener(this);
	Meeting.addActionListener(this);
	Load.addActionListener(this);
	Save.addActionListener(this);


	JPanel rooms = new JPanel();
	rooms.setLayout(new GridLayout(5,3));
	this.add(rooms,BorderLayout.CENTER);
	rooms.setBorder(BorderFactory.createLineBorder(Color.black));
	rooms.setBorder(border);
        
        bedroom201 = new JLabel("201 Single",JLabel.CENTER);
	bedroom201.setBorder(border);
	rooms.add(bedroom201);
	bedroom201.addMouseListener(this);

	bedroom202 = new JLabel("202 Single",JLabel.CENTER);
	bedroom202.setBorder(border);
	rooms.add(bedroom202);
	bedroom202.addMouseListener(this);


	bedroom203 = new JLabel("203 Single",JLabel.CENTER);
	bedroom203.setBorder(border);
	rooms.add(bedroom203);
	bedroom203.addMouseListener(this);

	bedroom204 = new JLabel("204 Double",JLabel.CENTER);
	bedroom204.setBorder(border);
	rooms.add(bedroom204);
	bedroom204.addMouseListener(this);

	bedroom205 = new JLabel("205 Double",JLabel.CENTER);
	bedroom205.setBorder(border);
	rooms.add(bedroom205);
	bedroom205.addMouseListener(this);

	bedroom206 = new JLabel("206 Double",JLabel.CENTER);
	bedroom206.setBorder(border);
	rooms.add(bedroom206);
	bedroom206.addMouseListener(this);

	bedroom207 = new JLabel("207 Double",JLabel.CENTER);
	bedroom207.setBorder(border);
	rooms.add(bedroom207);
	bedroom207.addMouseListener(this);

	bedroom208 = new JLabel("208 Double",JLabel.CENTER);
        bedroom208.setBorder(border);
	rooms.add(bedroom208);
	bedroom208.addMouseListener(this);

	bedroom209 = new JLabel("209 Double",JLabel.CENTER);
	bedroom209.setBorder(border);
	rooms.add(bedroom209);
	bedroom209.addMouseListener(this);

	bedroom210 = new JLabel("210 Double",JLabel.CENTER);
	bedroom210.setBorder(border);
	rooms.add(bedroom210);
	bedroom210.addMouseListener(this);

	bedroom211 = new JLabel("211 Double",JLabel.CENTER);
	bedroom211.setBorder(border);
	rooms.add(bedroom211);
	bedroom211.addMouseListener(this);

	bedroom212 = new JLabel("212 Double",JLabel.CENTER);
	bedroom212.setBorder(border);
	rooms.add(bedroom212);
	bedroom212.addMouseListener(this);

	meetingroom101 = new JLabel("101 Meeting Room",JLabel.CENTER);
	meetingroom101.setBorder(border);
	rooms.add(meetingroom101);
	meetingroom101.addMouseListener(this);

	meetingroom102 = new JLabel("102 Meeting Room",JLabel.CENTER);
	meetingroom102.setBorder(border);
	rooms.add(meetingroom102);
	meetingroom102.addMouseListener(this);

	meetingroom103 = new JLabel("103 Meeting Room",JLabel.CENTER);
	meetingroom103.setBorder(border);
	rooms.add(meetingroom103);
	meetingroom103.addMouseListener(this);
        
        }



	public void actionPerformed(ActionEvent e)
	{



	}

	public void mousePressed(MouseEvent e)
	{

	}

	public void mouseReleased(MouseEvent e)
	{

	}

	public void mouseEntered(MouseEvent e)
	{

	}

	public void mouseExited(MouseEvent e)
	{

	}

	 public void mouseClicked(MouseEvent e)
	 {
             if (e.getSource().equals (Single))
             {
                 
             }
                 
                
            
                 

	 }


}    

And the code that I have for the Room & Bedroom class's is

public class Room 
{
    int roomNumber;
    double rate;
    String customer;

    public Room() 
    {
      
    }

    public Room(int n, double r)
    {
      n = roomNumber;
      r = rate;

    }

    public void bookRoom(String cust) 
    {
        customer = cust;
    }

    public void clearBooking() 
    {
        customer = null;
    }

    public String getCustomer() 
    {
        return customer;
    }

    public double getRate() 
    {
        
        return rate;
    }

    public int getRoomNumber() 
    {
        
        return roomNumber;
    }

    public String toString()
    {
        
        return customer;
       
    }
}    

public class Bedroom extends Room
{
    String roomtype;

    Bedroom()
    {


    }

    Bedroom(int n, double r, String t )
    {


           super();
           rate = r;
           roomNumber = n;
           roomtype = t;

	   
			
    }

    String getType()
    {
       return roomtype;
    }

    @Override public String toString()
    {
		
        
      return super.toString() +
              " is in Room " + roomNumber + " " +  
              "-" + " " + "This is a" + " " + roomtype + " " +
              "Room" +" " + "-" + " " + " At a price of " + "£" + rate;
		
    }



}
    

[edit]Please avoid very long lines; they make the code hard to read. I have split the longest line, and you can see how it ought to be done. CR[/edit]

[Ernest Friedman-Hill]

Then you can use a "for" loop to visit each room in the Vector "hotel", and call getCustomer() on it to see if it returns null.

[Ross McManus]

Thanks.

So that would go in the mouse clicked event?

 public void mouseClicked(MouseEvent e)
	 {
             if (e.getSource().equals (Single))
                 
             {
                 
                 
                 
                 
             }    

[Campbell Ritchie]

Why do you have panels called bedroom101, bedroom102, etc (or similar). Why can't you write a loop which will initialise them, and associate them with a Bedroom object? You can even set up a Map<Bedroom, Panel> which will allow you to find the panel from the associated Bedroom.

[Ernest Friedman-Hill]

Ross McManus wrote:Thanks.

So that would go in the mouse clicked event?

Yes. Personally, I'd put the code that actually looped over the rooms into a separate method, and call it from the event handler -- but you could put it all in the event handler if you like.

[Priety Sharma]

Hi Ross,

You have probably got the answer from the replies posted.

I have an alternative way of doing this.

You could maintain 2 additional separate vectors one for Bedrooms and one for the Meeting rooms and populate them with vacant Bedroom numbers and Meeting room numbers respectively.

So if the vector size is 0 you dont have anything vacant. Else, you have vacant Bedrooms or Meeting rooms.

This could solve you problem.
These vectors should be in sync with your original vector.
Hope this helps.