☕ Cafe Management System

A Java Swing based desktop application for managing a cafe shop. This project includes product management, employee authentication, signup/login system, image upload support, and MySQL database integration. This project was developed as a Group Project during our Object Oriented Programming (OOP) Lab Course.

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📌 Features

🔐 Authentication System

• Employee Signup
• Employee Login
• Password Visibility Toggle
• Input Validation
• Duplicate Username/Email/Phone Detection

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🛍 Product Management

• Add Products
• Update Products
• Delete Products
• Upload Product Images
• Product Categories
• Product Description & Pricing

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🖼 Image Handling

• Upload product images using JFileChooser
• Preview uploaded image
• Store image path in MySQL database

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🗂 Categories

Products can be categorized into:

• Refreshments
• Warmers
• Quickbites
• Beverage
• Sandwich
• Desserts

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🛠 Technologies Used

Technology	Purpose
Java	Core Programming
Java Swing	GUI Development
MySQL	Database
JDBC	Database Connectivity
NetBeans IDE	Development Environment

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🧩 Object-Oriented Programming (OOP) Concepts Used

This project implements the four main OOP principles as follows:

🧱 1. Encapsulation

• All UI components and data fields (e.g., product details, user credentials) are encapsulated inside their respective classes.
• Data is accessed and modified through methods such as button event handlers (addActionPerformed, signUpActionPerformed, etc.).
• This helps in protecting data and controlling access within the application.

🧬 2. Abstraction

• Internal implementation details like JDBC database connection, SQL queries, and file handling are hidden from the user.
• The user interacts only with simple actions like Add, Update, Delete, and Sign Up.
• Complexity is reduced by separating UI actions from backend logic.

🧱 3. Inheritance

• Built-in inheritance is used through Java Swing classes.
• Example:
  • JFrame is inherited by all GUI classes such as Login, Signup, and Product.
• This allows reuse of pre-built GUI functionality.

🧩 4. Polymorphism

• Achieved through event handling mechanisms in Java Swing.
• Methods like actionPerformed() are used for different buttons and components, showing different behaviors based on user interaction.
• Event listeners demonstrate runtime polymorphism.

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🧠 Learning Outcomes

This project demonstrates:

• Java Swing GUI Development
• Event Handling
• JDBC Integration
• CRUD Operations
• File Handling
• Regex Validation
• Image Processing