Question

In some older homes that do not have a central heating and air conditioning system, smaller air conditioning units made to fit inside of a window and cool a single room are used as an alternative way to cool the home.

Depending on the size of the room and the amount of shade that the room has, different sizes of air conditioning units must be used in order to be able to properly cool the room. The unit of measure for the amount of cooling that an air conditioner unit can provide is the BTU (British Thermal Unit) per hour.

Code a program in Java that will calculate the correct size of air conditioner for a specific room size using the instructions below.

Step 1:

Ask the user to enter the length of their room (in feet). Should not be less than 5

Step 2:

Ask the user to enter the width of their room (in feet). Should not be less than 5

Step 3:

Calculate the area (in square feet) of the room by multiplying the length and the width of the room.

For example, if a room is 20 feet wide by 24 feet long, then its area is 20 * 24 = 480 square feet

Step 4:

Display a menu that asks the user how much shade the room gets. The menu should have the following options:

1. Little Shade
2. Moderate Shade
3. Abundant Shade

Step 5:

Determine the capacity of the air conditioning unit that is needed for a moderately shaded room by using the information in the table below.

Room Size (Square Feet)	Air Conditioner Capacity (in BTUs per Hour)
Under 250	5,500
From 250 to 500	10,000
Over 500 to Under 1000	17,500
1000 or Greater	24,000

If the room has little shade, then the BTU capacity should be increased by 15% since the air conditioning unit must be able to produce extra cooling.

If the room has abundant shade, then the BTU capacity should be decreased by 10% since the air conditioning unit does not need to work as hard to cool a shaded room.

First, move any named constants from inside of your main method to above the main method and make them static by adding the “static” keyword in front of them. For example, “static final double TAX_RATE = .075;”. By doing this, all of the static methods you will create below will have access to your named constants so that you do not need to declare them locally in each method.

In addition to the main method, your code must include the following static methods:

Method 1 - displayTitle

A void method that displays the title

Method 2 – calculateArea

A method that accepts the length and width of a room as arguments, and calculates and returns the area of the room

Method 3 – translateShadeChoiceToString

A method that accepts an integer value (1, 2, or 3) that denotes the amount of shade. The method should return the appropriate String representation of the shade. For example, if the method is passed an integer value of 1, it should return a String with a value of “Little”.

Method 4 - calculateBTUsPerHour

A method that accepts the area of a room and the amount of shade a room gets and returns the BTUs per Hour that are needed to adequately cool that room.

Method 5 - displayRoomInformation

A void method that prints out the information for a single room. The output should look exactly the same as the output for Project 2. The method should accept only the arguments necessary to print out the information.

At the end of the output, in the main method, the program should display the number of rooms that have been entered.

Sample Input and Output (user input is in bold) - The output of your program should match the formatting and spacing exactly as shown

Please enter the name of the room: Guest Bedroom
Please enter the length of the room (in feet): 15.5
Please enter the width of the room (in feet): 10
What is the amount of shade that this room receives?

1. Little Shade
2. Moderate Shade
3. Abundant Shade

Please select from the options above: 3

Air Conditioning Window Unit Cooling Capacity
Room Name: Guest Bedroom
Room Area (in square feet): 155.0

Answer 1

=======================

JAVA PROGRAM

=======================

////////////////AirConditioningCapacity.JAVA/////////////////////////

import java.util.Scanner;

/**
* Class: AirConditioningCapacity
* File: AirConditioningCapacity.java
* Purpose: To calculate ac unit capacity based on user input
*/
public class AirConditioningCapacity {
   //constants for different ac capacity based on room areas
   private static final double CAPACITY_FOR_ROOM_UNDER_250 = 5500;
   private static final double CAPACITY_FOR_ROOM_250_TO_500 = 10000;
   private static final double CAPACITY_FOR_ROOM_OVER_500_UNDER_1000 = 17500;
   private static final double CAPACITY_FOR_ROOM_1000_OR_GREATER = 24000;
  
   //constants defined for increase or decrease in capacity based on room shade
   private static final double CAPACITY_INCREASE_FOR_LITTLE_SHADE = 0.15; //15%
   private static final double CAPACITY_DECREASE_FOR_ABUNDANT_SHADE = 0.10; //10%
  
   //all room shades are defined in array
   private static final String[] roomShades = {"Little Shade","Moderate Shade","Abundant Shade"};
  
   //main method starts
   public static void main(String[] args){
       //scanner instance created
       Scanner sc = new Scanner(System.in);
      
       int roomCounter = 0; //this will keep track of number of rooms
      
       //continue to take rooms as long as user wants
       do{
           roomCounter++; //keep track of number of rooms entered
          
           System.out.println("Please enter the name of the room: ");
           String roomName = sc.nextLine(); //read name of room
          
           System.out.println("Please enter the length of the room (in feet): ");
           double length = Double.parseDouble(sc.nextLine());//read length
          
           System.out.println("Please enter the width of the room (in feet): ");
           double width = Double.parseDouble(sc.nextLine());//read width
          
           System.out.println("What is the amount of shade that this room receives?");
           for(String shade: roomShades){//print different room shades
               System.out.println(shade);
           }
          
           System.out.println("Please select from the options above: ");
           int amountOfShade = Integer.parseInt(sc.nextLine());//take data for amount of shade
           //translate room shade into String info
           String roomShade = translateShadeChoiceToString(amountOfShade);
           double area = calculateArea(length, width);   //calculate area of the room  
           double acCapacity = calculateBTUsPerHour(area, amountOfShade);//calculate capacity
           displayTitle();//print title
           displayRoomInformation(roomName, area);//display room info
           //additionally prints room shade
           System.out.println("Room Shade: "+roomShade);
           //finally prints capacity of the ac unit
           System.out.println("Capacity of the air conditioning unit "
                   + "(in BTU Per Hour): "+acCapacity);
          
           //checks if user wants to enter another room
           System.out.println("\nPress Y to enter another room or any other key to exit: ");
           String userChoice = sc.nextLine(); //read user's choice
           if(!userChoice.equalsIgnoreCase("Y")){ //if anything other than Y or y is entered
               break;//break out of the loop
           }
       }while(true);
      
       //print room counter
       System.out.println("Total number of rooms entered: "+ roomCounter);
   }
  
   /**
   * display title
   */
   public static void displayTitle(){
       System.out.println("Air Conditioning Window Unit Cooling Capacity");
   }
  
   /**
   * calculate area of the room
   * @param length
   * @param width
   * @return
   */
   public static double calculateArea(double length,double width){
       double area = 0;
       if(length > 0 && width > 0){
           area = length * width;
       }
       return area;
   }
  
   /**
   * convert amountOfShade to Stringequivlent
   * using roomShades array
   * @param amountOfShade
   * @return
   */
   public static String translateShadeChoiceToString(int amountOfShade){
       String shadeChoice = "Invalid Shade Choice";
       //if amount of shade is in range of number of shades
       if(amountOfShade >= 0 && amountOfShade <=roomShades.length){
           shadeChoice = roomShades[amountOfShade -1]; //take value from array
       }
      
       return shadeChoice;
   }
  
   /**
   * calculate capacity based on room area and amountOfShade
   * @param area
   * @param amountOfShade
   * @return
   */
   public static double calculateBTUsPerHour(double area,int amountOfShade){
       double capacityInBTUPerHour = 0;
      
       //check for different room sizes
       if(area < 250){
           capacityInBTUPerHour = CAPACITY_FOR_ROOM_UNDER_250;
       }else if(area >=250 && area <= 500){
           capacityInBTUPerHour = CAPACITY_FOR_ROOM_250_TO_500;
       }else if(area > 500 && area < 1000){
           capacityInBTUPerHour = CAPACITY_FOR_ROOM_OVER_500_UNDER_1000;
       }else if(area >= 1000){
           capacityInBTUPerHour = CAPACITY_FOR_ROOM_1000_OR_GREATER;
       }
      
       //check for different room shades
       if(amountOfShade ==1){ //for little shade increase by 15%
           capacityInBTUPerHour += capacityInBTUPerHour*CAPACITY_INCREASE_FOR_LITTLE_SHADE;
       }else if(amountOfShade ==2){ //for moderate shade no change
           //no change, keep it as it is
       }else if(amountOfShade == 3){//for abundant shade decrease by 10%
           capacityInBTUPerHour -= capacityInBTUPerHour*CAPACITY_DECREASE_FOR_ABUNDANT_SHADE;
       }
      
       return capacityInBTUPerHour;
   }
  
   /**
   * display room name and area
   * @param roomName
   * @param roomArea
   */
   public static void displayRoomInformation(String roomName,double roomArea){
       System.out.println("Room Name: "+roomName);
       System.out.println("Room Area (in square feet): "+roomArea);  
   }

}

==============================

OUTPUT

==============================

Please enter the name of the room:
Guest Bedroom
Please enter the length of the room (in feet):
15.5
Please enter the width of the room (in feet):
10
What is the amount of shade that this room receives?
Little Shade
Moderate Shade
Abundant Shade
Please select from the options above:
1
Air Conditioning Window Unit Cooling Capacity
Room Name: Guest Bedroom
Room Area (in square feet): 155.0
Room Shade: Little Shade
Capacity of the air conditioning unit (in BTU Per Hour): 6325.0

Press Y to enter another room or any other key to exit:
Y
Please enter the name of the room:
Dining Room
Please enter the length of the room (in feet):
25
Please enter the width of the room (in feet):
18.5
What is the amount of shade that this room receives?
Little Shade
Moderate Shade
Abundant Shade
Please select from the options above:
3
Air Conditioning Window Unit Cooling Capacity
Room Name: Dining Room
Room Area (in square feet): 462.5
Room Shade: Abundant Shade
Capacity of the air conditioning unit (in BTU Per Hour): 9000.0

Press Y to enter another room or any other key to exit:
Y
Please enter the name of the room:
Kitchen
Please enter the length of the room (in feet):
30
Please enter the width of the room (in feet):
12
What is the amount of shade that this room receives?
Little Shade
Moderate Shade
Abundant Shade
Please select from the options above:
2
Air Conditioning Window Unit Cooling Capacity
Room Name: Kitchen
Room Area (in square feet): 360.0
Room Shade: Moderate Shade
Capacity of the air conditioning unit (in BTU Per Hour): 10000.0

Press Y to enter another room or any other key to exit:
n
Total number of rooms entered: 3