7.21 Ch 7 Program: Online shopping cart (continued) (Java) 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 fieldsstring itemDescription - Initialized in default constructor to "none"
• Parameterized constructor to assign item name, item description, item price, and item quantity (default values of 0). (1 pt)
• Public member methodssetDescription() mutator & getDescription() accessor (2 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:

• 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 fieldsString 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 (1 pt)
• 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()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() (2 pts)Returns quantity of all items in cart. Has no parameters.
• getCostOfCart() (2 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

 

Ex. of printDescriptions() output:

John Doe's Shopping Cart - February 1, 2016

Item Descriptions
Nike Romaleos: Volt color, Weightlifting shoes
Chocolate Chips: Semi-sweet
Powerbeats 2 Headphones: Bluetooth headphones

 

(3) In main(), prompt the user for a customer's name and today's date. Output the name and date. Create an object of type ShoppingCart. (1 pt)

 

Ex.

Enter Customer's Name:
John Doe
Enter Today's Date:
February 1, 2016

Customer Name: John Doe
Today's Date: February 1, 2016

 

(4) Implement the printMenu() method. printMenu() has a ShoppingCart parameter, and outputs a menu of options to manipulate the shopping cart. Each option is represented by a single character. Build and output the menu within the method.

If the an invalid character is entered, continue to prompt for a valid choice. Hint: Implement Quit before implementing other options. Call printMenu() in the main() method. Continue to execute the menu until the user enters q to Quit. (3 pts)

 

Ex:

MENU
a - Add item to cart
d - Remove item from cart
c - Change item quantity
i - Output items' descriptions
o - Output shopping cart
q - Quit

Choose an option: 

 

(5) Implement Output shopping cart menu option. (3 pts)

 

Ex:

OUTPUT SHOPPING CART
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

 

(6) Implement Output item's description menu option. (2 pts)

 

Ex.

OUTPUT ITEMS' DESCRIPTIONS
John Doe's Shopping Cart - February 1, 2016

Item Descriptions
Nike Romaleos: Volt color, Weightlifting shoes
Chocolate Chips: Semi-sweet
Powerbeats 2 Headphones: Bluetooth headphones

 

(7) Implement Add item to cart menu option. (3 pts)

 

Ex:

ADD ITEM TO CART
Enter the item name:
Nike Romaleos
Enter the item description:
Volt color, Weightlifting shoes
Enter the item price:
189
Enter the item quantity:
2

 

(8) Implement Remove item menu option. (4 pts)

 

Ex:

REMOVE ITEM FROM CART
Enter name of item to remove:
Chocolate Chips

 

(9) Implement Change item quantity menu option. Hint: Make new ItemToPurchase object and use ItemToPurchase modifiers before using modifyItem() method. (5 pts)

 

Ex:

CHANGE ITEM QUANTITY
Enter the item name:
Nike Romaleos
Enter the new quantity:
3