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Java OOPs Projects Repository

A collection of Core Java projects demonstrating Object-Oriented Programming concepts and practical applications. This repository showcases mini-projects built using Java fundamentals and OOPs principles.

📚 Repository Overview

This repository contains Java projects developed to practice and demonstrate core programming concepts. Each project focuses on different aspects of OOPs principles and real-world problem-solving using Java.

🛠️ Technologies Used

  • Language: Core Java (JDK 8+)
  • Concepts: OOPs (Encapsulation, Inheritance, Polymorphism, Abstraction)
  • IDE: IntelliJ IDEA / Eclipse / VS Code
  • Development: Console-based applications

📁 Current Projects

1. Bill Generator System ✅

  • Folder: /bill-generator/
  • Description: A comprehensive billing system that generates invoices and manages customer transactions
  • OOPs Concepts Used:
    • Encapsulation: Private data members with getter/setter methods
    • Inheritance: Different types of bills (e.g., retail, wholesale)
    • Abstraction: Abstract billing classes and interfaces
  • Features:
    • Product/service addition to bills
    • Bill generation and printing
    • Total amount calculation

2. Car ShowRoom Mangement ✅

  • Folder: showroom-management-system/
showroom-management-system/
├── ShowroomManagement/
│   ├── Main.java           # Main application entry point
│   ├── Showroom.java       # Base showroom class
│   ├── Employee.java       # Employee management class  
│   ├── Cars.java          # Car inventory class
│   └── utility            # Interface for common methods
├── README.md
└── LICENSE
  • Description: A comprehensive showroom management system that handles automotive dealership operations including showroom registration, employee management, and car inventory tracking through an interactive console interface
  • OOPs Concepts Used:
    • Encapsulation: Private data members in Showroom, Employee, and Cars classes with controlled access through get_details() and set_details() methods
    • **Inheritance:**Employee and Cars classes extend the base Showroom class, inheriting common attributes and behaviors
    • Abstraction: utility interface defines abstract methods (get_details() and set_details()) that must be implemented by all classes
    • Polymorphism: Method overriding where each class provides its own specific implementation of inherited abstract methods
  • Features:
    • Showroom Management
    • Employee Management
    • Car Inventory System
    • Interactive Console Interface

🔮 Future Projects (Coming Soon)

  • Student Management System
  • Library Management System
  • Banking Application

🔧 Prerequisites

  • Java JDK 8 or higher
  • Basic understanding of Java syntax
  • Knowledge of OOPs concepts
  • Any Java IDE or text editor
  • Command line familiarity

🤝 Contributing

Contributions are welcome! You can:

  • Improve the existing bill generator code
  • Add new features to the billing system
  • Contribute new mini-projects
  • Fix bugs or enhance documentation

How to Contribute:

  1. Fork the repository
  2. Create a feature branch (git checkout -b feature/new-feature)
  3. Commit your changes (git commit -m 'Add new feature')
  4. Push to the branch (git push origin feature/new-feature)
  5. Open a Pull Request

📧 Contact

⭐ Star this repository if you find it helpful for learning Java and OOPs concepts!

This repository is actively maintained and new projects will be added regularly.