Java OOP Practice Problems

This repository contains a complete collection of Java Object-Oriented Programming (OOP) practice problems with examples. The problems are organized by topic and difficulty level to help learners understand Java OOP concepts step by step.

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📌 Purpose of This Repository

• Help beginners learn Java OOP concepts clearly
• Provide well-structured practice problems
• Serve as a reference for college students and self-learners
• Share reusable examples with the community

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🧠 Topics Covered

• Classes and Objects
• Variables and Methods
• Static Variables and Static Methods
• Encapsulation
• Inheritance
• Polymorphism
• Abstraction
• Constructors
• Method Overloading & Overriding
• Mini OOP-based Programs

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📂 Repository Structure

java-oop-problems/
│
├── basics/
│   ├── variables/
│   ├── methods/
│   └── static-members/
│       ├── EasyProblem.java
│       ├── MediumProblem.java
│       └── HardProblem.java
│
├── oop-concepts/
│   ├── encapsulation/
│   ├── inheritance/
│   ├── polymorphism/
│   └── abstraction/
│
├── mini-projects/
│   └── bank-management-system/
│
└── README.md

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🟢 Difficulty Levels

Each topic may include problems divided into:

• 🟢 Easy – For beginners
• 🟡 Medium – Requires basic OOP understanding
• 🔴 Hard – Real-world and logical problems

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📝 How to Use This Repository

1. Clone the repository:

   git clone https://github.com/Najimi420/java-oop-problems.git

2. Open the project in any Java IDE (IntelliJ, Eclipse, VS Code)

3. Navigate topic-wise and start practicing

4. Read problem statements in comments before writing or running code

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👥 Who Can Use This?

• Java beginners
• College students
• Interview preparation candidates
• Anyone learning Object-Oriented Programming in Java

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🤝 Contributions

Contributions are welcome!

You can:

• Add new problems
• Improve existing examples
• Fix bugs or optimize code

Feel free to fork this repository and submit a pull request.

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📄 License

This project is licensed under the MIT License. You are free to use, modify, and share this code for learning and teaching purposes.

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⭐ Support

If you find this repository helpful:

• Star ⭐ the repository
• Share it with others who are learning Java

Happy Coding! 🚀