Question

Make a class called CashRegister that has the method

public static double getTotalCostOfOfferings(ArrayList<Offering> o)

Make this method calculate the total cost of all Offering objects in the ArrayList.

Submit Product, Service, and CashRegister.

Given Files:

import java.util.ArrayList;

public class Demo3
{

    public static void crunch(ArrayList<Offering> o) {
        System.out.println("Adding up the following offerings:");
        for (Offering current : o) {
            System.out.println(current);
        }
        System.out.printf("Total for all: $%,.2f\n", CashRegister.getTotalCostOfOfferings(o));
        System.out.println("---------------------------------\n");
    }

    public static void main(String[] args)
    {
        ArrayList<Offering> offeringList = new ArrayList<>();

        offeringList.add(new Product("iPhone", 999));
        offeringList.add(new Product("Movie ticket", 12));
        crunch(offeringList);

        offeringList.add(new Product("Backpack", 25));
        offeringList.add(new Product("Toyota Corolla", 19000));
        crunch(offeringList);

        offeringList.add(new Service("Gardening", 15, 10));
        offeringList.add(new Service("House keeping", 20, 17));
        crunch(offeringList);

        offeringList.add(new Service("Data Entry", 10, 25));
        offeringList.add(new Service("Driver", 13, 3));
        crunch(offeringList);
    }
}

And:

public abstract class Offering
{
    private String name;

    public Offering(String n) {
        name = n;
    }

    public abstract double getTotalCost();

    public String toString() {
        return name + " costs $" + String.format("%.2f", getTotalCost());
    }
}

And:

public class Service extends Offering
{
  private String names;
  private String hourRate;
  private double rate;
  private double totalCost;


  public Service(String n, double r, double h)
  {
    super(n);
    names = n;
    rate = r;
    hourRate = " Each hour costs " + String.format("%.2f", r);
    totalCost = r * h;

  }

  @Override
  public double getTotalCost()
  {
    return totalCost;
  }

  @Override
  public String toString()
  {
    return names + " costs $" + String.format("%.2f", getTotalCost()) + "." + hourRate;
  }
}

//////////// Required Output ////////////

Adding up the following offerings:\n
iPhone costs $999.00\n
Movie ticket costs $12.00\n
Total for all: $1,011.00\n
---------------------------------\n
\n
Adding up the following offerings:\n
iPhone costs $999.00\n
Movie ticket costs $12.00\n
Backpack costs $25.00\n
Toyota Corolla costs $19000.00\n
Total for all: $20,036.00\n
---------------------------------\n
\n
Adding up the following offerings:\n
iPhone costs $999.00\n
Movie ticket costs $12.00\n
Backpack costs $25.00\n
Toyota Corolla costs $19000.00\n
Gardening costs $150.00. Each hour costs 15.00\n
House keeping costs $340.00. Each hour costs 20.00\n
Total for all: $20,526.00\n
---------------------------------\n
\n
Adding up the following offerings:\n
iPhone costs $999.00\n
Movie ticket costs $12.00\n
Backpack costs $25.00\n
Toyota Corolla costs $19000.00\n
Gardening costs $150.00. Each hour costs 15.00\n
House keeping costs $340.00. Each hour costs 20.00\n
Data Entry costs $250.00. Each hour costs 10.00\n
Driver costs $39.00. Each hour costs 13.00\n
Total for all: $20,815.00\n
---------------------------------\n
\n

Answer 1

public class Product extends Offering {

    private double cost;

    public Product(String name, double cost) {
        super(name);
        this.cost = cost;
    }

    @Override
    public double getTotalCost() {
        return cost;
    }
}

public class Service extends Offering {
    private String names;
    private String hourRate;
    private double rate;
    private double totalCost;


    public Service(String n, double r, double h) {
        super(n);
        names = n;
        rate = r;
        hourRate = " Each hour costs " + String.format("%.2f", r);
        totalCost = r * h;

    }

    @Override
    public double getTotalCost() {
        return totalCost;
    }

    @Override
    public String toString() {
        return names + " costs $" + String.format("%.2f", getTotalCost()) + "." + hourRate;
    }
}

import java.util.ArrayList;

public class CashRegister {
    public static double getTotalCostOfOfferings(ArrayList<Offering> offerings) {
        double total = 0;
        for (int i = 0; i < offerings.size(); i++) {
            total += offerings.get(i).getTotalCost();
        }
        return total;
    }
}