shopping cart

Shop Cart Application

The Shop Cart Application simulates an e-commerce shopping cart. It incorporates all the discussed Java concepts,

allowing users to add products, view the cart, calculate totals, manage inventories, handle exceptions, and save cart data to a file.

Application Features

Product Management:

Maintain a catalog of products with details like name, price, and quantity using collections.

Allow users to search for products.

Shopping Cart Operations:

Add products to the cart.

View cart details and calculate the total price.

Remove items from the cart.

Persistence:

Save cart details to a file.

Read previously saved cart data.

Error Handling:

Handle invalid inputs and file-related errors gracefully.

Architecture:

Two-tier Architecture: Separation between business logic and user interface.

Incorporates OOP principles like encapsulation, inheritance, and polymorphism.

Concept Mapping

FeatureJava Concepts Used

Product catalog and cartCollections (List, Map), Iterators

Add/Remove/View itemsControl flow, methods, loops

Product and Cart classesOOP: Classes, objects, encapsulation

Calculate total priceMethods, data types

Save/Load cartFile handling, exception handling

User inputConsole I/O, string manipulation

Error handlingTry-catch-finally, custom exceptions

Application Design

Classes and Responsibilities

Product:

Represents a product with attributes: id, name, price, and stock.

Includes getter and setter methods.

CartItem:

Represents an item in the cart with attributes: product and quantity.

Cart:

Manages cart items using a List<CartItem>.

Methods: addItem(), removeItem(), calculateTotal().

ShopManager:

Handles product catalog and inventory using Map<Integer, Product>.

Main:

User interface for adding/removing items, viewing the cart, and saving/loading data.

GUI:

1. View Catalog

2. Add to Cart

3. Remove from Cart

4. View Cart

5. Save Cart to File

6. Load Cart from File

7. Exit

Choose an option: