Question

Program Description

A local company has requested a program to calculate the cost of different hot tubs that it sells. Use the following instructions to code the program:

File 1 - HotTubLastname.java

• Write a class that will hold fields for the following:

• • The model of the hot tub
  • The hot tub’s feature package (can be Basic or Premium)
  • The hot tub’s length (in inches)
  • The hot tub’s width (in inches)
  • The hot tub’s depth (in inches)
• The class should also contain the following methods:
  • A constructor that doesn’t accept arguments
  • A constructor that accepts arguments for each field.
  • Appropriate accessor and mutator methods (i.e., setters and getters).
  • A method named getCapacity that accepts no arguments and calculates and returns the capacity (in gallons) of the hot tub.

The capacity of the hot tub can be calculated by using the following formula:

Capacity in gallons = (Length * Width * Depth) / 1728 * 4.8

• • A method named getPrice that accepts no arguments and calculates and returns the price of the hot tub based on the following table:

Hot Tub Capacity	Package	Cost Per Gallon
Less than 350 gallons	Basic	$5.00
Less than 350 gallons	Premium	$6.50
350 but not more than 500 gallons	Basic	$6.00
350 but not more than 500 gallons	Premium	$8.00
Over 500 gallons	Basic	$7.50
Over 500 gallons	Premium	$10.00

Price = Cost Per Gallon * Capacity

File 2 - DemoLastname.java

• Write a program that demonstrates the class and calculates the cost of hot tubs. The program should ask the user for the following:

• • The model of the hot tub
  • The hot tub’s feature package (can be Basic or Premium)
  • The hot tub’s length (in inches). The program should not accept a number less than 60 for the length.
  • The hot tub’s width (in inches). The program should not accept a number less than 60 for the width.
  • The hot tub’s depth (in inches). The program should not accept a number less than 30 for the depth.

• The program should prompt the user for all the data necessary to fully initialize the objects. IMPORTANT: Store your objects in a container that will automatically expand as objects are added.
• The program should continue allowing the user to input information until the user indicates to stop (see sample input on page 3). Note: The program should accept lower or upper case responses to this question.
• After the user indicates that they wish to stop, the program should output the information for each hot tub.
  • The capacity of the hot tub should be formatted to two decimal places.
  • The price of the hot tub should be formatted as currency to two decimal places and include a comma in the thousands place.
• After the program outputs the information for each hot tub, it should output the total cost of all of the hot tubs.
• The program should display the input and output as shown in the provided sample output (Note: this includes blank lines).

Answer 1

please refer to below attached photos for clear understanding and implementation of the program :

code :

import java.util.*;
import java.io.*;

class HotTub{
    private String model;
    private String pkge;
    private double length;
    private double width;
    private double depth;
    
    public HotTub(){
        length = 0;
        width = 0;
        depth = 0;
    }
    
    public HotTub(String model , String pkge , double length , double width , double depth){
        this.model = model;
        this.pkge = pkge;
        this.length = length;
        this.width = width;
        this.depth = depth;
    }
    
    public double getCapacity(){
        return (length * width * depth) / 1728 * 4.8;
    }
    
    public double getPrice(){
        double cap = getCapacity();
        double cost_per_gallon = 0;
        if(cap < 350){
            if(pkge.compareTo("basic") == 0){
                cost_per_gallon = 5.00;
            }
            else{
                cost_per_gallon = 6.50;
            }
        }
        else if(cap >= 350 && cap < 500){
            if(pkge.compareTo("basic") == 0){
                cost_per_gallon = 6.00;
            }
            else{
                cost_per_gallon = 8.00;
            }
        }
        else{
            if(pkge.compareTo("basic") == 0){
                cost_per_gallon = 7.50;
            }
            else{
                cost_per_gallon = 10.00;
            }
        }
        
        return cost_per_gallon * cap;
    }
}

public class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        ArrayList<HotTub> hottubs = new ArrayList<HotTub>();
        String choice = "y";
        while(!(choice.compareTo("N") == 0) && !(choice.compareTo("n") == 0)){
            String model;
            String pkge;
            double length;
            double width;
            double depth;
            System.out.print("\nModel : ");
            model = in.nextLine();
            System.out.print("\nPackage (basic / premium) : ");
            pkge = in.nextLine();
            System.out.print("\nLength (min : 60 inches) : ");
            length = in.nextFloat();
            System.out.print("\nWidth  (min : 60 inches) : ");
            width = in.nextFloat();
            System.out.print("\nDepth (min : 30 inches) : ");
            depth = in.nextFloat();
            in.nextLine();
            HotTub tub = new HotTub(model , pkge , length , width , depth);
            hottubs.add(tub);
            System.out.print("Do u wish to Continue : (y/n) : ");
            choice = in.nextLine();
        }
        
        double total_cost = 0;
        for(int i=0;i<hottubs.size();i++){
            HotTub tub = hottubs.get(i);
            System.out.println("Capacity : " + tub.getCapacity() + " , Price : " + tub.getPrice());
            total_cost += tub.getPrice();
        }
        
        System.out.println("Total Price : " + total_cost);
    }
}