Question

I know that there are several different answers that has already been posted for this. I have tried all of the options but wanted to see if I can get a correct one that actually works.

Assume that a gallon of paint covers about 350 square feet of wall space. Create an application with a main() method that prompts the user for the length, width, and height of a rectangular room. Pass these three values to a method that does the following:

• Calculates the wall area for a room
• Passes the calculated wall area to another method that calculates and returns the number of gallons of paint needed
• Displays the number of gallons needed
• Computes the price based on a paint price of $32 per gallon, assuming that the painter can buy any fraction of a gallon of paint at the same price as a whole gallon
• Returns the price to the main() method

The main() method displays the final price. For example:

You will need 2.0 gallons
The price to paint the room is $64.0

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• PaintCalculator.java

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import java.util.Scanner;

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public class PaintCalculator {

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    public static void main (String args[]) {

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        // Write your code here

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    }

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​

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    public static double computeArea(double length, double width, double height) {

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        // Write your code here

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    }

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    public static double computeGallons(double area) {

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        // Write your code here

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    }

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}

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​Please, please please help!  I've been working on this problem for a week now.

Answer 1

import java.util.Scanner;

public class PaintCalculator {
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter length: ");
        double length = in.nextDouble();
        System.out.print("Enter width: ");
        double width = in.nextDouble();
        System.out.print("Enter height: ");
        double height = in.nextDouble();

        double area = computeArea(length, width, height);
        double gallons = computeGallons(area);
        System.out.println("You will need " + gallons + " gallons");
        System.out.println("The price to paint the room is $" + (32 * gallons));

        in.close();
    }

    public static double computeArea(double length, double width, double height) {
        return 2*(length*width + length*height + height*width);
    }

    public static double computeGallons(double area) {
        return Math.ceil(area / 350);
    }
}