Chapter 3, Problem 8PE

Explanation of Solution

Program:

PaintCalculator.java

//import the required packages

import java.util.Scanner;

//define the class PaintCalculator

public class PaintCalculator

{

//declare the require constants

private static int AREA_PER_GALLON = 350;

private static double PRICE_PER_GALLON = 32;

//method that calculate the area, gallons of required paint and the total price

public static double calculate(double length, double height, double width)

{

//calculate the area

double area = length * height * 2 + width * height * 2;

//call the method calculateGallons()

double gallonsRequired = calculateGallons(area);

//print the gallonsRequired

System.out.println("Require Gallons of paint: " + gallonsRequired);

//calculate the price

double price = gallonsRequired * PRICE_PER_GALLON;

//return price

return price;

    }

//define the method calculateGallons()

public static double calculateGallons(double area)

{

//returns the number of gallons for the given area

return area/AREA_PER_GALLON;

}

//define the main method

public static void main(String[] args)

    {

//declare the required variables

int length, height, width;

//create the object for Scanner class

Scanner inputScanner = new Scanner(System.in);

//prompt the user to enter length of room

System.out.print("Enter Length of the room: ");

//read the length from the user

length = inputScanner.nextInt();

//prompt the user to enter width of room

System.out.print("Enter Width of the room: ");

//read the width from the user

width = inputScanner.nextInt();

//prompt the user to ente Height of room

System...