Java Programming question:

Create a shopping cart application with three classes (in three files) as follows:

class CartItem

• defines these private data members:
  • String item, double price, int quantity
• defines a constructor that sets all data members when a CartItem is instantiated.
• defines setters for all data members.
• defines a subtotal method that returns the item price * quantity.
• defines a toString method that summarizes the data for an item.

class Cart

• defines these data members:
  • a private ArrayList of CartItem objects .
  • a public static double to hold the total for the cart, initial value zero.
• defines a constructor that instantiates the ArrayList of cart items.
• codes the method with the signature below to add a cart item and update the total:
  • public void add(String item, double price, int quantity)
• codes a showCart method to print and number the arraylist cart items. This method also prints the cart total.
• codes the following method to remove an item based on its number in the cart.
  • public void removeItem(int number)

class CartTest

• creates a new empty Cart and then adds five or six items to it.
• displays the cart.
• runs a loop at least once to ask if an item should be deleted, and if so, prompts for the item number, deletes that item, and redisplays the cart.

Sample Output

1 Cart item: Echo Dot, price=29.99, quantity=3

2 Cart item: Wemo plug, price=39.99, quantity=2

3 Cart item: Ear buds, price=49.99, quantity=2

4 Cart item: Google Home, price=79.0, quantity=1

Cart total $348.93

Do you wish to remove an item before checkout (y/n)?

y

Enter item # to delete

3

1 Cart item: Echo Dot, price=29.99, quantity=3

2 Cart item: Wemo plug, price=39.99, quantity=2

3 Cart item: Google Home, price=79.0, quantity=1

Cart total $248.95

Do you wish to remove an item before checkout (y/n)?

n

1 Cart item: Echo Dot, price=29.99, quantity=3

2 Cart item: Wemo plug, price=39.99, quantity=2

3 Cart item: Google Home, price=79.0, quantity=1

Cart total $248.95

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I'm not getting the correct output

Here is my code:

package chapter10;

public class CartItem {

private String item; private double price; private int quantity; public CartItem(String i, double p, int q) { setItem(i); setPrice(p); setQuantity(q); } public void setItem(String value) { this.item = value; } public void setPrice(double value) { this.price = value; } public void setQuantity(int value) { this.quantity = value; }

public double subTotal() { return price * quantity; } public String toString() { return "Item: "+ item +", Cost: "+ price; } }

package chapter10;

import java.util.ArrayList;

public class Cart {

private ArrayList cartItems; public static double cartTotal = 0.0; public Cart() { this.cartItems = new ArrayList<>(); } public void add(String item, double price, int quantity) { cartItems.add(new CartItem(item, price, quantity)); cartTotal += price * quantity; } public void showCart() { for (int i = 0; i < cartItems.size(); i++) { System.out.println((i+1) +" - "+ cartItems.get(i)); } System.out.println("Cart total: "+ cartTotal); } public void removeItem(int number) { cartItems.remove(number-1); }

}

package chapter10;

public class CartTest {

static java.util.Scanner scanner = new java.util.Scanner(System.in);

public static void main(String[] args) { //Create a new cart Cart cart = new Cart(); cart.add("Echo Dot", 29.99, 3); cart.add("Wemo plug", 39.99, 2); cart.add("Ear buds", 49.99, 2); cart.add("Google Home", 79.00, 1); //Display the cart cart.showCart(); String line = ""; char choice = 0; while(choice != 'n') { line = prompt("Do you wish to remove an item before checkout (y/n)?"); choice = line.toLowerCase().charAt(0); if (choice == 'y') { line = prompt("Enter item number to remove:"); cart.removeItem(Integer.parseInt(line)); } } cart.showCart(); } private static String prompt(String prompt) { while(true) { System.out.println(prompt); try { return scanner.nextLine(); } catch (Exception e) {} } } }