🛒 Java E-Commerce Desktop Application

A feature-rich desktop e-commerce platform developed using Java Swing. This application provides a complete shopping experience, from user authentication to product management and order processing, all within a standalone desktop environment.

🚀 Overview

This project demonstrates the implementation of a full-stack desktop application architecture without the need for a heavy SQL backend. It utilizes JSON and structured text files for data persistence, showcasing efficient file I/O operations and local data management.

✨ Key Features

• 🔐 User Authentication System: Secure login and registration modules with persistent user data.
• 📦 Interactive Product Catalog: A visual storefront where users can browse items with real-time price and detail updates.
• ❤️ Favorites Management: A personalized "Wishlist" system allowing users to mark products with a heart icon for later viewing.
• 🛒 Shopping Cart Logic: Dynamic cart management where users can add/remove items and calculate total costs.
• 💳 Secure Checkout Simulation: A dedicated credit card processing module to validate and finalize purchases.
• 📜 Order History: Persistent storage and retrieval of past transactions, allowing users to review their "Last Orders."
• 🖼️ Rich GUI: A customized Swing interface featuring image-based buttons (cart, favorites) and responsive layouts.

🛠 Technical Stack & Implementation

• GUI Framework: Developed with Java Swing (AWT), utilizing custom JFrame and JPanel designs for a modern user experience.
• Data Persistence (NoSQL Approach): * JSON Data Handling: Uses JSONUserData.json to store complex user profiles and credentials.
  • Flat-File Storage: Implements userData.txt, favoriteProductsData.txt, and lastOrderData.txt for lightweight and fast data retrieval.
• Object-Oriented Design: * Model-View Architecture: Clear separation between logic (Product, User, Order) and UI (LoginScreen, ProductScreen).
  • Encapsulation: Robust class structures to ensure data integrity across the application.
• Resource Management: Dynamic loading of local assets (PNG icons for the cart, heart, and product images) from the src/img/ directory.

💡 Engineering Highlights

• Local Persistence Engine: Optimized file reading and writing mechanisms to ensure no data loss during application restarts.
• State Management: Efficiently handles user states (logged in vs. guest) and maintains the shopping cart session across different screens.
• Error Handling: Robust validation for login credentials and credit card inputs to provide a smooth user journey.

🚀 Getting Started

Prerequisites

• JDK 8 or higher (Recommended: JDK 17+).
• IDE: NetBeans (Recommended) or IntelliJ IDEA.

Installation & Execution

1. Clone the repository:

   git clone [https://github.com/yourusername/e-commerceApplication.git](https://github.com/yourusername/e-commerceApplication.git)
   cd e-commerceApplication