Assume that a gallon of paint covers about 350 square feet of wall space. Create

Question

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 of 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, the cost to paint a 15-by-20-foot
room with 10-foot cielings is $64 dollars. Save as PaintClculator.java

**Note: I can prompt the user, but I can't get a return from my code.

import java.util.Scanner;

public class PaintCalculator {
   public static void main(String [] args)
   {
   Scanner keyboard = new Scanner(System.in);

double wallArea;
   double height;
   double length;
   double width;
double price;
double WallArea;
double paintQuantity;


//Prompts user for the dimensions of the room   
   System.out.print("Please enter the height of the room: ");
   height = keyboard.nextDouble();

System.out.print("Please enter the length of the room: ");
   length = keyboard.nextDouble();

System.out.print("Please enter the width of the room: ");
   width = keyboard.nextDouble();

WallAreaMethod(height, length, width);
}



//Calulates the area of the wall in a room
public static double WallAreaMethod(double height, double length, double width)
{
double wallArea;
wallArea = length * height * width * height;

return wallArea;
}



//Computes the quanity of paint needed
public static double paintFormula(double wallAreaMethod, double price, double height, double length,double width)
{

double wallArea;
double paintQuantity;

paintQuantity = wallAreaMethod * 2 / 350;


System.out.println("For a room of height " + height + "feet, length " +
   length + " feet, and width " + width + " feet you need to purchase "
   + paintQuantity + " gallons of paint.");

System.out.println("The price will be $" + price + ".");

price = paintQuantity * 32.0;

return price;
}

}

Please help!

Explanation / Answer

import java.util.Scanner;
public class PaintCalculator {
public static void main(String [] args)
{
Scanner keyboard = new Scanner(System.in);

double wallArea;
double height;
double length;
double width;
double price;
double WallArea;
double paintQuantity;

//Prompts user for the dimensions of the room   
System.out.print("Please enter the height of the room: ");
height = keyboard.nextDouble();

System.out.print("Please enter the length of the room: ");
length = keyboard.nextDouble();

System.out.print("Please enter the width of the room: ");
width = keyboard.nextDouble();

double area=WallAreaMethod(height, length, width);
//int price1=90;
System.out.println("area"+area);
//double value =paintFormula(area, price, height, length, width);
//System.out.println("area "+area);

}

//Calulates the area of the wall in a room
public static double WallAreaMethod(double height, double length, double width)
{
double wallArea;
wallArea = length * height * width * height;

return wallArea;
}

//Computes the quanity of paint needed
public static double paintFormula(double wallAreaMethod, double price, double height, double length,double width)
{

double wallArea;
double paintQuantity;

paintQuantity = wallAreaMethod * 2 / 350;

System.out.println("For a room of height " + height + "feet, length " +
length + " feet, and width " + width + " feet you need to purchase "
+ paintQuantity + " gallons of paint.");

System.out.println("The price will be $" + price + ".");

price = paintQuantity * 32.0;

return price;
}

}

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