Question

Need three seperate files. ShoppingCartManager.java

ShoppingCart.java

ItemsToPurchase.java

7.25 LAB*: Program: Online shopping cart (Part 2) Note: Creating multiple Scanner objects for the same input stream yields unexpected behavior. Thus, good practice is to use a single Scanner object for reading input from System.in. That Scanner object can be passed as an argument to any methods that read input This program extends the earlier Online shopping cart program (Consider first saving your earlier program) (1) Extend the Item To Purchase class per the following specifications • Private fields • string item Description - 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) • printitemCosto - Outputs the item name followed by the quantity, price, and subtotal • printitem Description() - Outputs the item name and description Ex of printitemCost output Bottled Water 10 @ $1 - $10 Ex of printitem Description() output Bottled Water: Deer Park, 12 oz. (2) Create two new files • Shopping Cart java -Class definition • Shopping Cart Manager java - Contains main() method

These are from part 1

what do you mean by deep study

Answer 1

/*********************************ItemToPurchase.java*****************************/

package cart;

public class ItemToPurchase {
   protected String itemName;
   protected int itemPrice;
   protected int itemQuantity;
   protected String itemDescription;

   public ItemToPurchase() {
       this.itemName = "none";
       this.itemPrice = 0;
       this.itemQuantity = 0;
       this.itemDescription = "none";
   }

   public ItemToPurchase(String itemName, String itemDescription, int itemPrice, int itemQuantity) {
       this.itemName = itemName;
       this.itemPrice = itemPrice;
       this.itemQuantity = itemQuantity;
       this.itemDescription = itemDescription;
   }

   public void setName(String itemName) {
       this.itemName = itemName;
   }

   public void setPrice(int itemPrice) {
       this.itemPrice = itemPrice;
   }

   public void setQuantity(int itemQuantity) {
       this.itemQuantity = itemQuantity;
   }

   public void setDescription(String itemDescription) {
       this.itemDescription = itemDescription;
   }

   public String getName() {
       return itemName;
   }

   public int getPrice() {
       return itemPrice;
   }

   public int getQuantity() {
       return itemQuantity;
   }

   public String getDescription() {
       return itemDescription;
   }

   public String printItemCost() {
       String cost = ("\n" + itemName + " " + itemQuantity + " @ $" + itemPrice + " = $" + (itemQuantity * itemPrice));
       return cost;
   }

   public String printItemDescription() {
       String description = (itemName + ": " + itemDescription);
       return description;
   }
}

/*************************************ShoppingCart.java***************************/

package cart;

import java.util.ArrayList;
import java.util.Iterator;

public class ShoppingCart {

   private String customerName;
   private String currentDate;
   private ArrayList<ItemToPurchase> cartItems;

   public ShoppingCart() {

       this.customerName = "";
       this.currentDate = "January 1, 2016";
       this.cartItems = new ArrayList<>();
   }

   public ShoppingCart(String customerName, String currentDate) {
       super();
       this.customerName = customerName;
       this.currentDate = currentDate;
       this.cartItems = new ArrayList<>();
   }

   public String getCustomerName() {
       return customerName;
   }

   public void setCustomerName(String customerName) {
       this.customerName = customerName;
   }

   public String getCurrentDate() {
       return currentDate;
   }

   public void setCurrentDate(String currentDate) {
       this.currentDate = currentDate;
   }

   public ArrayList<ItemToPurchase> getCartItems() {
       return cartItems;
   }

   public void setCartItems(ArrayList<ItemToPurchase> cartItems) {
       this.cartItems = cartItems;
   }

   public void addItem(ItemToPurchase item) {

       cartItems.add(item);
   }

   public void removeItem(String itemName) {

       int flag = 0;
       Iterator<ItemToPurchase> itr = cartItems.iterator();
       while (itr.hasNext()) {
           ItemToPurchase item = itr.next();

           if (item.getName().equalsIgnoreCase(itemName)) {

               itr.remove();
               flag = 1;
           }
       }

       if (flag == 0) {

           System.out.println("Item not found in the cart. Nothing found");
       }
   }

   public void modifyItem(String itemName, int quantity) {

       int flag = 0;
       ItemToPurchase item = null;
       for (ItemToPurchase itemToPurchase : cartItems) {

           if (itemToPurchase.getName().equalsIgnoreCase(itemName)) {

               flag = 1;
               item = itemToPurchase;
              
           }
       }

       if (flag == 1) {

           item.setQuantity(quantity);

       } else {

           System.out.println("Item not found in cart. Nothing modified.");
       }

   }

   public int getNumItemsInCart() {

       return cartItems.size();
   }

   public int getCostOfCart() {

       int totalCost = 0;
       for (ItemToPurchase itemToPurchase : cartItems) {

           totalCost += itemToPurchase.getPrice();
       }

       return totalCost;
   }

   public void printTotal() {
      
       for (ItemToPurchase itemToPurchase : cartItems) {
      
           System.out.println(itemToPurchase.printItemDescription());
       }
      
   }
   public void printDescription() {

       System.out.println(customerName + "'s Shopping cart - " + currentDate);
       System.out.println("Number of items: " + getNumItemsInCart());

       for (ItemToPurchase itemToPurchase : cartItems) {

           System.out.println(itemToPurchase.printItemCost());
       }
   }
}
/**************************************ShoppingCartManager.java*********************/

package cart;

import java.util.Scanner;

public class ShoppingCartManager {

   public static void main(String[] args) {

       Scanner scan = new Scanner(System.in);

       System.out.println("Enter Customer's Name: ");
       String customerName = scan.nextLine();

       System.out.println("Enter today's Date: ");
       String date = scan.nextLine();

       ShoppingCart cart = new ShoppingCart(customerName, date);
       char option = ' ';

       do {

           printMenu();
           option = scan.nextLine().toLowerCase().charAt(0);

           switch (option) {
           case 'a':
               System.out.println("Add ITEM TO CART");
               System.out.println("Enter the item name: ");
               String itemName = scan.nextLine();
               System.out.println("Enter the item description: ");
               String itemDesc = scan.nextLine();
               System.out.println("Enter the item price: ");
               int itemPrice = scan.nextInt();
               scan.nextLine();
               System.out.println("Enter the item quantity: ");
               int quantity = scan.nextInt();
               scan.nextLine();
               cart.addItem(new ItemToPurchase(itemName, itemDesc, itemPrice, quantity));
               break;
           case 'd':
               System.out.println("REMOVE ITEM FROM CART");
               System.out.println("Enter name of item to remove: ");
               String name = scan.nextLine();
               cart.removeItem(name);
               break;
           case 'c':
               System.out.println("CHANGE ITEM QUANTITY");
               System.out.println("Enter the item name: ");
               name = scan.nextLine();
               System.out.println("Enter the new quantity: ");
               quantity = scan.nextInt();
               scan.nextLine();
               cart.modifyItem(name, quantity);
               break;
           case 'i':
               cart.printTotal();
               break;
           case 'o':
               cart.printDescription();
               break;
           case 'q':
               System.out.println("Thank you, Bye!");
               break;

           default:
               System.out.println("Invalid Choice! try againg..");
               break;
           }

       } while (option != 'q');

   }

   public static void printMenu() {

       System.out.println("Menu\n" + "a - Add item to cart\n" + "d - Remove item from cart\n"
               + "c - Change item Quantity\n" + "i - Output item's descriptions\n" + "o - Output shopping cart\n"
               + "q - Quit\n" + "\n" + "Choose an option: ");
   }
}
/************************output********************/

Enter Customer's Name:
John Doe
Enter today's Date:
February 1, 2016
Menu
a - Add item to cart
d - Remove item from cart
c - Change item Quantity
i - Output item's descriptions
o - Output shopping cart
q - Quit

Choose an option:
a
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
Menu
a - Add item to cart
d - Remove item from cart
c - Change item Quantity
i - Output item's descriptions
o - Output shopping cart
q - Quit

Choose an option:
i
Nike Romaleos: Volt Color, Weightlifting Shoes
Menu
a - Add item to cart
d - Remove item from cart
c - Change item Quantity
i - Output item's descriptions
o - Output shopping cart
q - Quit

Choose an option:
o
John Doe's Shopping cart - February 1, 2016
Number of items: 1

Nike Romaleos 2 @ $189 = $378
Menu
a - Add item to cart
d - Remove item from cart
c - Change item Quantity
i - Output item's descriptions
o - Output shopping cart
q - Quit

Choose an option:
c
CHANGE ITEM QUANTITY
Enter the item name:
Nike Romaleos
Enter the new quantity:
4
Menu
a - Add item to cart
d - Remove item from cart
c - Change item Quantity
i - Output item's descriptions
o - Output shopping cart
q - Quit

Choose an option:
o
John Doe's Shopping cart - February 1, 2016
Number of items: 1

Nike Romaleos 4 @ $189 = $756
Menu
a - Add item to cart
d - Remove item from cart
c - Change item Quantity
i - Output item's descriptions
o - Output shopping cart
q - Quit

Choose an option:
q
Thank you, Bye!

Console X <terminated> Shopping CartManager [Java Application] C:\Program Files\Java\jre1.8.0_211\bin\javaw.e Enter Customer's Name: John Doe Enter today's Date: February 1, 2016 Menu a - Add item to cart d - Remove item from cart C - Change item Quantity i - Output item's descriptions 0 - Output shopping cart q - Quit Choose an option: 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: Menu a - Add item to cart d - Remove item from cart C - Change item Quantity i - Output item's descriptions 0 - Output shopping cart q - Quit Choose an option: Nike Romaleos: Volt Color, Weightlifting Shoes Menu a - Add item to cart d - Remove item from cart C - Change item Quantity i - Output item's descriptions 0 - Output shopping cart q - Quit Choose an option: John Doe's Shopping cart - February 1, 2016 Number of items: 1 Nike Romaleos 2 @ $189 = $378 Menu a - Add item to cart

e Console X <terminated> Shopping CartManager (Java Application] C:\Program Files\Java\jre1.8. 1 - output Items descriptions 0 - Output shopping cart q - Quit Choose an option: John Doe's Shopping cart - February 1, 2016 Number of items: 1 Nike Romaleos 2 @ $189 = $378 Menu a - Add item to cart d - Remove item from cart C - Change item Quantity i - Output item's descriptions 0 - Output shopping cart 9 - Quit Choose an option: CHANGE ITEM QUANTITY Enter the item name: Nike Romaleos Enter the new quantity: Menu a - Add item to cart d - Remove item from cart C - Change item Quantity i - Output item's descriptions 0 - Output shopping cart q - Quit Choose an option: John Doe's Shopping cart - February 1, 2016 Number of items: 1 Nike Romaleos 4 @ $189 = $756|| Menu a - Add item to cart d - Remove item from cart C - Change item Quantity i - Output item's descriptions 0 - Output shopping cart q - Quit Choose an option: Thank you, Bye!

Please let me know if you have any doubt or modify the answer, Thanks :)