if statement

[Ross McManus]

Hi.

I am trying to write code for a Hotel Booking System.

On the first part it tells me

Rooms numbered 201 to 203 are single bedrooms, with a rate of 35.
Rooms 204 to 212 are double bedrooms with a rate of 60

I guess I am going to have to write an if statement for this. I was just wondering how I write one so that it is

if roomNumber = 201 to 203
{
rate = 35

}

EDIT : I have just tried something and it compiles, Just wondering if anyone could tell me if this is right. Here is the code.

import javax.swing.*;
 
public class Room
{
    int roomNumber;
    int n = roomNumber;
    
    double rate;
    double t = rate;
    
    String customer;
    
    
    Room()
    {
	}

	Room(int n, double t)
    {
	    if (n == 201)
	    {
		    t = 35;
		}
		else if (n == 202)
		{
			t = 35;
		}
		else if (n == 203)
		{
			t = 35;
		}
    
    }
    
    void bookRoom(String customer)
    {
        
    }
    
    void clearBooking()
    {
        
    }

    String getCustomer()
    {
        return customer;
    }

    double getRate()
    {
        return rate;
    }

    int getRoomNumber()
    {
        return roomNumber;
    }

    public String toString()
    {
        return customer;
    }

}
    

[David Newton]

http://www.java2s.com/Tutorial/Java/0080__Statement-Control/Usinginifstatement.htm

Check that out first, then give it a shot--if you still have further questions, post the if statement syntax you're trying and we'll take it from there!

[Abimaran Kugathasan]

Ross McManus wrote:
if roomNumber = 201 to 203
{
rate = 35

}

I don't know whether I understood you question properly. But my suggestion:

if(roonMumber >= 201 && roomNumber <= 203) {
  // your work
}

Is this you want?

[Ross McManus]

Abimaran Kugathasan wrote:

Ross McManus wrote:
if roomNumber = 201 to 203
{
rate = 35

}

I don't know whether I understood you question properly. But my suggestion:

if(roonMumber >= 201 && roomNumber <= 203) {
  // your work
}

Is this you want?

Yes that is exactly what I needed thanks for the reply.

Also David Newton thanks for the link as well.

[Ross McManus]

I have another question if someone could help.

On the sheet I have it says.

"If a room is not booked, the customer is null"

I guess I have to write an if statement somewhere to check if the room has been booked or not and then set the customer to null?

Does anyone know where I would write this code?

I have a bookRoom(String); Method would it be in there?

Here is the room code again. In the if statements that I wrote before I have added customer = null; Because on the sheet it said "All rooms may have a customer, Initially the customer will be null."

import javax.swing.*;
 
public class Room
{
    int roomNumber;
    int n = roomNumber;
    
    double rate;
    double t = rate;
    
    String customer;
    
    
    Room()
    {
	}

	Room(int n, double t)
    {
	    if( n >= 201 && roomNumber <= 203)
	    {
		    t = 35;
		    customer = null;
		 
	    }   
		else 
		{
			System.out.println("Please enter a correct room number");
		}
	}
    
    void bookRoom(String customer)
    {
	    
        
    }
    
    void clearBooking()
    {
        
    }

    String getCustomer()
    {
        return customer;
    }

    double getRate()
    {
        return rate;
    }

    int getRoomNumber()
    {
        return roomNumber;
    }

    public String toString()
    {
        return customer;
    }

}    

[David Newton]

Abimaran Kugathasan wrote:
(a complete answer)

Please do not hand out answers on a plate; our goal at JavaRanch is to be something other than a code mill--please see NotACodeMill.

Since it's too late, I have not removed your solution.

[David Newton]

I have a bookRoom(String); Method would it be in there?

No, that would be backwards. When a customer checks out the room would no longer have a customer.

    int roomNumber;
    int n = roomNumber;

I don't understand the purpose of "n".

Here's something else to consider.

Is a customer an intrinsic property of a room? Or is a customer something that occasionally occupies a room? What if a room has more than one person in it? What if the same person pays for multiple rooms? My initial reaction is that I'd have a map of rooms to customers in the room, rather than a room having a customer. (Or a customer having a room.)

In addition, is room booking something that a Room class should know anything about? Or is room booking something that whatever *contains* the rooms should know something about? And why should a room understand pricing rules? What if they change? Why should a room know number ranges of *other* rooms? In other words, if I'm room 235, should I really know about room 240?

[Abimaran Kugathasan]

David Newton wrote:

Abimaran Kugathasan wrote:
(a complete answer)

Please do not hand out answers on a plate; our goal at JavaRanch is to be something other than a code mill--please see NotACodeMill.

Since it's too late, I have not removed your solution.

Really sorry. apologize me! Won't happen anymore!

[Ross McManus]

David Newton wrote:

I have a bookRoom(String); Method would it be in there?

No, that would be backwards. When a customer checks out the room would no longer have a customer.

    int roomNumber;
    int n = roomNumber;

I don't understand the purpose of "n".

Here's something else to consider.

Is a customer an intrinsic property of a room? Or is a customer something that occasionally occupies a room? What if a room has more than one person in it? What if the same person pays for multiple rooms? My initial reaction is that I'd have a map of rooms to customers in the room, rather than a room having a customer. (Or a customer having a room.)

In addition, is room booking something that a Room class should know anything about? Or is room booking something that whatever *contains* the rooms should know something about? And why should a room understand pricing rules? What if they change? Why should a room know number ranges of *other* rooms? In other words, if I'm room 235, should I really know about room 240?

I am not sure, On the sheet I got it has a UML diagram and I just created the class's off what was specified in the UML diagram.

Here is what I got.

[David Newton]

Oh, well, if you're coding to a spec it doesn't matter then. If you changed your code and want feedback on it, post a new message rather than editing the original.