In Java. I cannot get the total to output.

This program extends the earlier "Online shopping cart" program. $($Consider first saving your earlier program$).$

$(1)$ Extend the ItemToPurchase class per the following specifications:

Private fields

string itemDescription $-$ Initialized in default constructor to "none"

Parameterized constructor to assign item name, item description, item price, and item quantity $($default values of $0).(5$ pt$)$

Public member methods

setDescription$()$ mutator & getDescription$()$ accessor $(5$ pts$)$

printItemCost$()-$ Outputs the item name followed by the quantity, price, and subtotal

printItemDescription$()-$ Outputs the item name and description

Ex$.$ of printItemCost$()$ output:

Bottled Water $10$ @ $$1=$ $$10$

Ex$.$ of printItemDescription$()$ output:

Bottled Water: Deer Park, $12$ oz$.$

$(2)$ Create two new files $(10$ pts$)$:

ShoppingCart.java $-$ Class definition

ShoppingCartManager.java $-$ Contains main$()$ method

Build the ShoppingCart class with the following specifications. Note: Some can be method stubs $($empty methods$)$ initially, to be completed in later steps.

Private fields $(10$ pts$)$

String customerName $-$ Initialized in default constructor to "none"

String currentDate $-$ Initialized in default constructor to "January $1,2016"$

ArrayList cartItems

Default constructor

Parameterized constructor which takes the customer name and date as parameters $(2$ pts$)$

Public member methods

getCustomerName$()$ accessor $(1$ pt$)$

getDate$()$ accessor $(1$ pt$)$

addItem$()$

Adds an item to cartItems array. Has parameter ItemToPurchase. Does not return anything.

removeItem$()$

Removes item from cartItems array. Has a string $($an item's name$)$ parameter. Does not return anything.

If item name cannot be found, output this message: Item not found in cart. Nothing removed.

modifyItem$()(2$ pts$)$

Modifies an item's description, price, and$/$or quantity. Has parameter ItemToPurchase. Does not return anything.

If item can be found $($by name$)$ in cart, check if parameter has default values for description, price, and quantity. If not, modify item in cart.

If item cannot be found $($by name$)$ in cart, output this message: Item not found in cart. Nothing modified.

getNumItemsInCart$()(3$ pts$)$

Returns quantity of all items in cart. Has no parameters.

getCostOfCart$()(3$ pts$)$

Determines and returns the total cost of items in cart. Has no parameters.

printTotal$()$

Outputs total of objects in cart.

If cart is empty, output this message: SHOPPING CART IS EMPTY

printDescriptions$()$

Outputs each item's description.

Ex$.$ of printTotal$()$ output: John Doe's Shopping Cart $-$ February $1,2016$

Number of Items: $8$

Nike Romaleos $2$ @ $$189=$ $$378$

Chocolate Chips $5$ @ $$3=$ $$15$

Powerbeats $2$ Headphones $1$ @ $$128=$ $$128$

Total: $$521$

MY CODE SO FAR:

package onlineShoppingCart;

import java.util.Scanner;

public class ItemToPurchase $\{$

$//$ Private fields

private String itemName;

private String itemDescription;

private int itemPrice;

private int itemQuantity;

$//$ Default constructor

public ItemToPurchase$()\{$

this.itemName $=$ "none";

this.itemDescription $=$ "none";

this.itemQuantity $=0$;

this.itemPrice $=0$;

$\}$

$//$ Parameterized constructor to assign name, description, price, and quantity

public ItemToPurchase$($String itemName, String itemDescription, int itemPrice, int itemQuantity$)\{$

this.itemName $=$ itemName;

this.itemDescription $=$ itemDescription;

this.itemPrice $=$ itemPrice;

this.itemQuantity $=$ itemQuantity;

$\}$

$//$ Public member methods

public String getItemDescription$()\{$

return itemDescription;

$\}$

public void setItemDescription$($String itemDescription$)\{$

this.itemDescription $=$ itemDescription;

$\}$

public void printItemCost$()\{$

System.out.println$($itemName $+""+$ itemQuantity $+"$ @ $$"+$ itemPrice $+"=$ $$"+($itemQuantity $*$ itemPrice$))$;

$\}$

public void printItemDescription$()\{$

System.out.println$($itemName $+"$: $"+$ itemDescription$)$;

$\}$

public String getName$()\{$

return itemName;

$\}$

public void setName$($String itemName$)\{$

this.itemName $=$ itemName;

$\}$

public int getPrice$()\{$

return itemPrice;

$\}$

public void setPrice$($int itemPrice$)\{$

this.itemPrice $=$ itemPrice;

$\}$

public int getQuantity$()\{$

return itemQuantity;

$\}$

public void setQuantity$($int itemQuantity$)\{$

this.itemQuantity $=$ itemQuantity;

$\}$

$\}$