In order to paint a wall that has a number of windows, we want to know its area. Each window has a size of 2 ft by 3 ft. Write a program that reads the width and height of the wall and the number of windows,.

The program in Java will be:

import java.util.Scanner;

public class Paint

{

   public static void main(String[] args)

   {

       final int COVERAGE = 350;  //paint covers 350 sq ft/gal

       final int DOOR = 20;

   final int WINDOW = 15;    

   //declare integers length, width, and height;

   int length, width, height, doors, windows;

   //declare double totalSqFt;

   double totalSqFt;

       //declare double paintNeeded;

   double paintNeeded;

     //declare and initialize Scanner object

   Scanner scan = new Scanner (System.in);

   //Prompt for and read in the length of the room

   // finish this -- length =  

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

   length = scan.nextInt();

   //Prompt for and read in the width of the room

       System.out.print("Enter width: ");

   width = scan.nextInt();

       //Prompt for and read in the height of the room

   System.out.print("Enter height: ");

   height = scan.nextInt();

       //Prompt for and enter the number of doors    

   System.out.println("Enter the number of doors: ");

   doors = scan.nextInt();

   //Prompt for and enter the number of windows

   System.out.println("Enter the number of windows: ");

   windows = scan.nextInt();

   //Compute the total square feet to be painted--think

      //about the dimensions of each wall

       totalSqFt = 2 * width * height + 2 * length * height - DOOR*doors - WINDOW*windows;

       //Compute the amount of paint needed

       paintNeeded = totalSqFt / COVERAGE;

       //Print the length, width, and height of the room and the

       //number of gallons of paint needed.

   System.out.println("Length= " + length + "\nWidth= " + width +  "\nHeight= " + height + "\nNumber of doors: " + doors + "\nNumber of windows: " + windows + "\nGallons of Paint Needed= " + paintNeeded);

   }

}

6ft

Explanation:

Step 1:

import java.util.Scanner;

class AreaOfRectangle {

public static void main (String[] args)

{

Scanner scanner = new Scanner(System.in);

System.out.println("Enter the length of Rectangle:");

double length = scanner.nextDouble();

System.out.println("Enter the width of Rectangle:");

double width = scanner.nextDouble();

//Area = length*width;

double area = length*width;

System.out.println("Area of Rectangle is:"+area);

}

}

Output

Enter the length of Rectangle:

2

Enter the width of Rectangle:

3

Area of Rectangle is:6.0