Westminster Shopping Manager

A Java-based desktop Shopping Management System developed using Object-Oriented Programming (OOP) principles.

Overview

Westminster Shopping Manager is a desktop application developed in Java for managing products and providing a simple shopping experience.

The system supports different types of products, including Electronics and Clothing, and provides both product management functionality and a graphical user interface for browsing products and managing a shopping cart.

The project demonstrates the practical application of core Object-Oriented Programming concepts in Java.

Technologies

• Java
• Java Swing
• Object-Oriented Programming (OOP)
• File Handling

OOP Concepts Used

• Classes and Objects
• Encapsulation
• Inheritance
• Abstraction
• Polymorphism
• Interfaces

The system uses an abstract Product class as the base class for product types such as Electronics and Clothing.

A ShoppingManager interface defines the main product-management operations.

Main Features

• Add new products
• Delete products
• Display the list of available products
• Support Electronics and Clothing product categories
• Save and load product information using a text file
• Filter products by category
• Display detailed product information
• Add products to a shopping cart
• Calculate the total shopping cart cost
• Apply a 20% discount when three or more products from the same category are purchased
• Graphical User Interface developed using Java Swing
• Sort and display products through a table-based interface

Product Types

Electronics

Stores information such as:

• Product ID
• Product name
• Number of available items
• Price
• Brand
• Warranty period

Clothing

Stores information such as:

• Product ID
• Product name
• Number of available items
• Price
• Size
• Colour

Project Structure

The main classes include:

• Product – Abstract base class for products
• Electronics – Represents electronic products
• Clothing – Represents clothing products
• ShoppingManager – Interface defining product-management operations
• westminsterShoppingManager – Implements the shopping-management functionality
• ShoppingCart – Handles products added to the cart and price calculations
• GUI – Provides the Java Swing graphical user interface
• User – Represents user information
• Main – Application entry point