Calculating Total?

[ethemartian]

Hello, I have this assignment from school (again..) in which I am creating a receipt for 3 customers, staying different amount of nights and with different amount of guests. I've coded everything but now I have to create a summary where the program adds the totals for different attributes of the objects. Im not quite sure how to do this, this is what I have so far (test class was provided by the professor, somewhat):

public class Hotel
{

    public String RoomNumber;



    final static double RoomRate = 79.95;
    final static double TaxRate = 6.5;
    final static double PhoneCharges = 5.75;
    final static double Meal = 12.95;
    final static double Tip = 0.075;


    private int nights;
    private int guests;
    private double AmountDue;
    private double MealCharges;
    private double TaxDue;
    private double Subtotal;
    private double Total;
    private double TipDue;


    public Hotel(String Room)
    {
        RoomNumber = Room;
        nights = 1;
        guests = 1;
    }

    public Hotel(String Room, int Nights)
    {
        this(Room);
        nights = Nights;

    }

    public Hotel(String Room, int Nights, int Guests)
    {
        this(Room, Nights);
        guests = Guests;
    }

public String getRoomNumber()
{
    return RoomNumber;
}

public double getRoomRate()
{
    return RoomRate;
}

public double getNumberOfNights()
{
    return nights;
}

public double getNumberOfGuests()
{
    return guests;
}

public double getAmountDue()
{
    return AmountDue;
}

public double getTaxRate()
{
    return TaxRate;
}

public double getTaxDue()
{
    return TaxDue;
}

public double getSubtotal()
{
    return Subtotal;
}

public double getPhoneCharges()
{
    return PhoneCharges;
}

public double getMeal()
{
    return Meal;
}

public double getTipDue()
{
    return TipDue;
}

public double getTotal()
{
    return Total;
}

public double getMealCharges()
{
    return MealCharges;
}

public double getSummaryTotal()
{
    return Total;
}

public void addNights(int amount)
{
    nights = nights + amount;
}

public void addGuest(int amount)
{
    guests = guests + amount;
}

public void calculate()
{
    AmountDue = RoomRate * guests * nights;
    TaxDue = AmountDue * TaxRate/100;
    Subtotal = AmountDue + TaxDue;
    MealCharges = Meal * guests * nights;
    TipDue = (Subtotal + MealCharges + PhoneCharges)* 0.075;
    Total = Subtotal + PhoneCharges + MealCharges + TipDue;
   
}

}

Test Class:

import java.util.Date;
import java.text.DateFormat;
import java.text.NumberFormat;
class TestHotel
{
public static void main(String[] arg)
{
NumberFormat f = NumberFormat.getCurrencyInstance();

		// Create customer objects, calculate amounts, display receipts
Hotel customer1 = new Hotel("10 - M", 2, 2);

customer1.calculate();
display(customer1, f);

Hotel customer2 = new Hotel("12 - B");


Hotel customer3 = new Hotel("12 - C", 2);
		customer3.calculate();

customer2.addNights(1);
customer2.calculate();
display(customer2, f);

		customer3.addGuest(1);
		customer3.calculate();
		display(customer3, f);

		display(f);
	}

	static void display(Hotel  h, NumberFormat f)
	{
		// Set up and display heading and date for each receipt
		System.out.println("\tThe ABC Cheap Lodging, Inc");
		Date d = new Date();
		DateFormat df = DateFormat.getDateInstance();
		System.out.println("\tDate: \t" + df.format(d));

		// Display expenses line by line including subtotal
		System.out.println("Room# \t\t\t" + h.getRoomNumber());
		System.out.println("Room Rate\t\t\t" + f.format(h.getRoomRate()));
		System.out.println("Length of stay\t\t" + h.getNumberOfNights() + " night(s)");
		System.out.println("No. of guests\t\t" + h.getNumberOfGuests());
		System.out.println("Room cost\t\t\t" + f.format(h.getAmountDue()));
		System.out.println("Tax" + h.getTaxRate() + "%\t\t\t\t"  + f.format(h.getTaxDue()));
		System.out.println("\tSubtotal \t\t\t" + f.format(h.getSubtotal()));
		System.out.println("Telephone \t\t\t" + f.format(h.getPhoneCharges()));
		System.out.println("Meal charges \t\t" + f.format(h.getMeal()));
		System.out.println("Tip \t\t\t\t" + f.format(h.getTipDue()));

		//Display to total
		System.out.println("\nTOTAL AMOUNT DUE\t.........." + f.format(h.getTotal()));

		// Display thank you message
		System.out.println("\nThanks for staying at The ABC Cheap Lodging, Inc" );
		System.out.println("\tPlease come again !!!");
		System.out.println("\n");
                System.out.println("\tToday's Summary "+ f.format(h.getSummaryTotal()));
	}
	static void display( NumberFormat f)
	{
	      // Complete this method so that it displays the summary amounts as shown in the output
              	System.out.println("\tOfficial Use Only");
                System.out.println("\n");
                



	}

}

The picture attached is what the professor wants it to look like.

Thanks!

[ethemartian]

I'm thinking can I overload the calculate() and have it do Total = Total + Total ? I'm not sure how to get it to calculate the total from 3 different objects without having to describe them (total1,total2, total3...) Totally pulling my hair on this one...

[Dr.Fox]

You dont need to overload the calculate or anything like that, you need to assign the totals of the three "Hotel" objects (customer1, customer2 and customer3) to a variable and display it.

You have a method called getTotal. You can run it for all 3. Think about how you can use this in the main of the TestHotel class.

[ethemartian]

When I use Hotel.getTotal netbeans tells me that:

non-static method getRoomRate() cannot be referenced from a static context

[Fubarable]

When I use Hotel.getTotal netbeans tells me that:

Java is telling you that, and it's correct. You must call that method on a Hotel object, not on the Hotel class as you're doing it.

[ethemartian]

Aghh okay I made # of nights and guests along with room rate class variables and this is the code im trying to make work for the summary:

	static void display(NumberFormat f)
	{
	      // Complete this method so that it displays the summary amounts as shown in the output
              	System.out.println("\tOfficial Use Only");
                System.out.println("\n");
                System.out.println("\tRoom ...." + Hotel.RoomRate * Hotel.getNumberOfGuests()*Hotel.getNumberOfNights());





	}

Its only coming up for the rate for the 3rd customer...Could you guys elaborate a little more when you say "you need to assign the totals of the three "Hotel" objects (customer1, customer2 and customer3) to a variable and display it."

Thanks in advance...I know im very dumb but I've also only taken 3 weeks of Java and I've been fighting this all night last night and all day today...

[Junky]

No No No that was not the solution.

String s = "hello";
int char = String.indexOf("e");

Surely you can recognise what is wrong with that code. You were doing the same in your code.