Case: Online Shopping Platform

Let's design an Online Shopping Platform with several classes, including an abstract class and interfaces, to manage users, products, and orders. Class $1$: User $$ Attributes: o userId $($String$)$: Unique identifier for each user. o username $($String$)$: The username of the user. o email $($String$)$: The email address of the user. $$ Methods: o displayUserInfo$()$: void: Displays detailed information about the user, including user ID$,$ username, and email. o updateEmail$($String newEmail$)$: void: Allows the user to update their email address. o placeOrder$($Order order$)$: void: Places an order on behalf of the user. Class $2$: Customer $($extends User$)$ Additional Attributes: o address $($String$)$: The shipping address of the customer. o orders $($ArrayList$)$: List of orders placed by the customer. o cart $($ArrayList$)$: Shopping cart containing products selected by the customer. $$ Additional Methods: o displayCustomerInfo$()$: void: Displays detailed information about the customer, including their address and order history. o addToCart$($Product product$)$: void: Adds a product to the customer's shopping cart. o viewCart$()$: void: Displays the contents of the customer's shopping cart. Abstract Class: Product $$ Attributes: o productId $($String$)$: Unique identifier for each product. o productName $($String$)$: The name of the product. o price $($double$)$: The price of the product. $$ Methods: o displayProductInfo$()$: void: Abstract method to display detailed information about the product. o getPrice$()$: double: Abstract method to get the price of the product. o isAvailable$()$: boolean: Abstract method to check the availability of the product. Interface: Orderable $$ Methods: o addToOrder$($Order order$)$: void: Allows adding a product to an order. o displayOrderDetails$()$: void: Displays details of the order. Class $3$: Clothing $($extends Product implements Orderable$)$ Additional Attributes: o size $($String$)$: The size of the clothing item. o quantityInStock $($int$)$: The quantity of the clothing item available in stock. $$ Additional Methods: o displayProductInfo$()$: void: Overrides the method in the base class to include information about the size. o getPrice$()$: double: Overrides the method in the base class to get the price of the clothing item. o isAvailable$()$: boolean: Overrides the method in the base class to check the availability of the clothing item. o addToOrder$($Order order$)$: void: Implements adding a clothing item to an order. o displayOrderDetails$()$: void: Implements displaying details of the order for a clothing item. Class $4$: Electronics $($extends Product implements Orderable$)$ Additional Attributes: o brand $($String$)$: The brand of the electronic item. o warrantyPeriod $($int$)$: The warranty period of the electronic item. $$ Additional Methods: o displayProductInfo$()$: void: Overrides the method in the base class to include information about the brand. o getPrice$()$: double: Overrides the method in the base class to get the price of the electronic item. o isAvailable$()$: boolean: Overrides the method in the base class to check the availability of the electronic item. o addToOrder$($Order order$)$: void: Implements adding an electronic item to an order. o displayOrderDetails$()$: void: Implements displaying details of the order for an electronic item. Class $5$: Order $$ Attributes: o orderId $($String$)$: Unique identifier for each order. o orderDate $($String$)$: The date when the order was placed. o orderItems $($ArrayList$)$: List of products in the order. o Status $($String$)$: The status of order. $($Ordered$,$ Shipped, Delivered$)$ Methods: o displayOrderInfo$()$: void: Displays detailed information about the order, including order ID$,$ order date, and order items. o calculateTotalPrice$()$: double: Calculates the total price of the order. o processOrder$()$: void: Processes the order, updating product quantities and notifying the customer. Class $6$: ShoppingSystem $$ Attributes: o products $($ArrayList$)$: List of available products in the shopping system. o users $($ArrayList$)$: List of registered users. $$ Methods: o displayMainMenu$()$: void: Displays the main menu of the online shopping platform. o displayProductsMenu$()$: void: Displays options related to shopping for products. o displayCartMenu$()$: void: Displays options related to the customer's shopping cart. o displayOrdersMenu$()$: void: Displays options related to viewing orders. o displayCustomerInfo$()$: void: Displays information about the customer. o exit$()$: void: Exits the online shopping platform.