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

ShoppingCartManager.java

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 currentDate = scan.nextLine();
ShoppingCart s = new ShoppingCart(customerName, currentDate);
System.out.println();
System.out.println("Customer Name: "+s.getCustomerName());
System.out.println("Today's Date: "+currentDate);
printMenu(s);
  
}
public static void printMenu(ShoppingCart s){
while(true){
System.out.println("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: ");
Scanner scan = new Scanner(System.in);
char ch = scan.next().charAt(0);
scan.nextLine();
if(ch == 'a' || ch == 'A' ){
System.out.println("ADD ITEM TO CART");
System.out.println("Enter Item Name: ");
String name = scan.nextLine();
  
System.out.println("Enter Item Description: ");
String itemDescritpion = scan.nextLine();
System.out.println("Enter Item Price: ");
int itemPrice = scan.nextInt();
System.out.println("Enter Item Quantity: ");
int quantity = scan.nextInt();
scan.nextLine();
ItemToPurchase item = new ItemToPurchase(name, itemDescritpion, itemPrice, quantity);
s.addItem(item);
}
else if(ch == 'd' || ch == 'D'){
System.out.println("REMOVE ITEM FROM CART");
System.out.println("Enter name of item to remove: ");
String name = scan.nextLine();
s.removeItem(name);
}
else if(ch == 'c' || ch == 'C'){
System.out.println("CHANGE ITEM QUANTITY");
System.out.println("Enter the item name: ");
String name = scan.nextLine();
System.out.println("Enter the new quantity: ");
int quantity = scan.nextInt();
ItemToPurchase item = new ItemToPurchase();
item.setName(name);
item.setItemQuantity(quantity);
s.modifyItem(item);
}
else if(ch == 'I' || ch == 'i'){
System.out.println("OUTPUT ITEMS' DESCRIPTIONS");
s.printDescriptions();
}
else if(ch == 'O' || ch == 'o'){
System.out.println("OUTPUT SHOPPING CART");
s.printTotal();
}
else if(ch == 'q' || ch == 'Q'){
break;
}
}
}
}

ShoppingCart.java

import java.util.ArrayList;

public class ShoppingCart {
private String customerName;
private String currentDate ;
ArrayList<ItemToPurchase> cartItems = new ArrayList<ItemToPurchase>();;
public ShoppingCart() {
currentDate = "January 1, 2016";
customerName = "none";
}
public ShoppingCart(String name , String date) {
this.currentDate = date;
this.customerName = name;
}
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 void addItem( ItemToPurchase i) {
cartItems.add(i);
}
public void removeItem(String name) {
boolean found = false;;
for(ItemToPurchase i: cartItems){
if(i.getName().equalsIgnoreCase(name)) {
cartItems.remove(i);
found = true;
break;
}
}
if(!found)
System.out.println("Item not found in cart. Nothing removed");
}
public void modifyItem(ItemToPurchase item) {
boolean found = false;;
for(ItemToPurchase i: cartItems){
if(i.getName().equalsIgnoreCase(item.getName())) {
if(i.getItemQuantity()!=0){
i.setItemQuantity(item.getItemQuantity());
}
found = true;
break;
}
}
if(!found)
System.out.println("Item not found in cart. Nothing removed");
}
public int getNumItemsInCart() {
int sum = 0;
for(ItemToPurchase i: cartItems){
sum = sum + i.getItemQuantity();
}
return sum;
}
public double getCostOfCart() {
double sum = 0;
for(ItemToPurchase i: cartItems){
sum = sum + i.getItemPrie();
}
return sum;
  
}
public void printTotal() {
if(cartItems!=null&& cartItems.size() >0 ){
System.out.println(customerName+"'s Shopping Cart - "+currentDate);
System.out.println("Number of Items: "+cartItems.size());
System.out.println();
for(ItemToPurchase i: cartItems){
  
i.printItemCost();
}
}
else{
System.out.println("SHOPPING CART IS EMPTY");
}
}
public void printDescriptions() {
System.out.println(customerName+"'s Shopping Cart - "+currentDate);
System.out.println("Number of Items: "+cartItems.size());
System.out.println();
System.out.println("Item Descriptions");
for(ItemToPurchase i: cartItems){
  
i.printItemDescription();
}
}
}

ItemToPurchase.java

public class ItemToPurchase {
private String itemDescription;
private String name;
private double itemPrie;
private int itemQuantity;
public ItemToPurchase() {
itemDescription = "none";
itemQuantity = 0;
itemPrie = 0;
name = "";
}
public ItemToPurchase(String name, String description, double price, int itemQuantity) {
this.itemDescription = description;
this.name = name;
this.itemPrie = price;
this.itemQuantity = itemQuantity;
}
public String getItemDescription() {
return itemDescription;
}
public void setItemDescription(String itemDescription) {
this.itemDescription = itemDescription;
}
public void printItemCost() {
System.out.println(name+" "+itemQuantity+" @ "+itemPrie+" = $"+(itemQuantity * itemPrie) );
}
public void printItemDescription() {
System.out.println(name+" "+itemDescription);
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getItemPrie() {
return itemPrie;
}
public void setItemPrie(double itemPrie) {
this.itemPrie = itemPrie;
}
public int getItemQuantity() {
return itemQuantity;
}
public void setItemQuantity(int itemQuantity) {
this.itemQuantity = itemQuantity;
}
  
}

Output:

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

Customer Name: John Doe
Today's Date: February 1, 2016
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:
a
ADD ITEM TO CART
Enter Item Name:
Nike Romaleos
Enter Item Description:
Volt color, Weightlifting shoes
Enter Item Price:
2
Enter Item Quantity:
189
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:
a
ADD ITEM TO CART
Enter Item Name:
Chocolate Chips
Enter Item Description:
Semi-sweet
Enter Item Price:
5
Enter Item Quantity:
3
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:
a
ADD ITEM TO CART
Enter Item Name:
Powerbeats 2 Headphones
Enter Item Description:
Bluetooth headphones
Enter Item Price:
2
Enter Item Quantity:
128
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:
a
ADD ITEM TO CART
Enter Item Name:
aaaa
Enter Item Description:
bbbb
Enter Item Price:
3
Enter Item Quantity:
4
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:
d
REMOVE ITEM FROM CART
Enter name of item to remove:
aaaa
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:
c
CHANGE ITEM QUANTITY
Enter the item name:
Chocolate Chips
Enter the new quantity:
7
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:
i
OUTPUT ITEMS' DESCRIPTIONS
John Doe's Shopping Cart - February 1, 2016
Number of Items: 3

Item Descriptions
Nike Romaleos Volt color, Weightlifting shoes
Chocolate Chips Semi-sweet
Powerbeats 2 Headphones Bluetooth headphones
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:
o
OUTPUT SHOPPING CART
John Doe's Shopping Cart - February 1, 2016
Number of Items: 3

Nike Romaleos 189 @ 2.0 = $378.0
Chocolate Chips 7 @ 5.0 = $35.0
Powerbeats 2 Headphones 128 @ 2.0 = $256.0
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:
q

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

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