19.16 Ch 7 Warm up: Online shopping cart (Java) (1) Create two files to submit:

Question

19.16 Ch 7 Warm up: Online shopping cart (Java)

(1) Create two files to submit:

ItemToPurchase.java - Class definition

ShoppingCartPrinter.java - Contains main() method

Build the ItemToPurchase class with the following specifications:

Private fields

String itemName - Initialized in default constructor to "none"

int itemPrice - Initialized in default constructor to 0

int itemQuantity - Initialized in default constructor to 0

Default constructor

Public member methods (mutators & accessors)

setName() & getName() (2 pts)

setPrice() & getPrice() (2 pts)

setQuantity() & getQuantity() (2 pts)

(2) In main(), prompt the user for two items and create two objects of the ItemToPurchase class. Before prompting for the second item, call scnr.nextLine(); to allow the user to input a new string. (2 pts)

Ex:

(3) Add the costs of the two items together and output the total cost. (2 pts)

Ex:

19.17 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 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). (1 pt)

Public member methods

setDescription() 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:

Ex. of printItemDescription() output:

(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 fields

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 (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:

Ex. of printDescriptions() output:

(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.

(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:

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

Ex:

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

Ex.

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

Ex:

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

Ex:

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

Ex:

Explanation / Answer

// Answer to 19.16

// ItemToPurchase

public class ItemToPurchase {
   public ItemToPurchase() {
       this.itemName = "none";
       this.itemPrice = 0;
       this.itemQuantity = 0;
   }
   private String itemName;
   private int itemPrice;
   private int itemQuantity;
   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;
   }
   @Override
   public String toString() {
       return itemName + " " + itemQuantity + " @ $" + itemPrice + "= $" + itemPrice*itemQuantity;
   }
}

// ShoppingCartPrinter

import java.util.Scanner;

public class ShoppingCartPrinter {
  
   public static Scanner scnr = new Scanner(System.in);
  
   public static ItemToPurchase getItemFromUser(int itemNumber)
   {
       ItemToPurchase item = new ItemToPurchase();
       System.out.println("Item " + itemNumber);
       System.out.println("Enter the item name: ");
       item.setName(scnr.nextLine());
       System.out.println("Enter the item price: ");
       item.setPrice(scnr.nextInt());
       System.out.println("Enter the item quantity: ");
       item.setQuantity(scnr.nextInt());
       scnr.nextLine();
      
       return item;
   }
  
   public static void main(String[] args)
   {
       ItemToPurchase item1 = getItemFromUser(1);
       ItemToPurchase item2 = getItemFromUser(2);

       int total = item1.getPrice()*item1.getQuantity() + item2.getPrice()*item2.getQuantity();
       System.out.println("TOTAL COST");
       System.out.println(item1);
       System.out.println(item2);
       System.out.println();
       System.out.println("Total: $" + total);
   }
}

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.