Object-Oriented-Programming

Java OOP Practice Repository

This repository is designed to help learners understand and practice Object-Oriented Programming (OOP) in Java through hands-on examples and exercises.

It is suitable for:

• Students taking introductory or intermediate Java courses
• Professionals refreshing their Java and OOP skills
• Anyone preparing for technical interviews

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📚 What You’ll Find Here

This repository is structured to combine theory, examples, and exercises:

1. Core OOP Concepts

Each topic includes explanations, code examples, and practice tasks:

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

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2. Code Examples

Well-structured Java programs demonstrating:

• Best practices
• Common design patterns (introductory level)
• Clean and readable code

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3. Exercises

Each section contains exercises of varying difficulty:

• 🟢 Beginner — basic syntax and concepts
• 🟡 Intermediate — combining multiple concepts
• 🔴 Advanced — design-oriented problems

Some exercises include:

• Starter code
• Expected outputs
• Hints or partial solutions

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4. Solutions

• Clear and well-documented solutions
• Multiple approaches where relevant
• Explanation of key ideas

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🗂 Repository Structure

/topics
    /introduction
    /classes-objects
    /information-hiding-and-encapsulation
    /strings
    /abstraction
    /inheritance-and-polymorphism
    /abstract-classes-and-interfaces
    /graphical-user-interfaces-GUI
    /event-driven-programming
    /exceptions

/examples
/exercises
/solutions

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🚀 Getting Started

Prerequisites

• Basic programming knowledge
• Java JDK (version 8 or higher recommended)
• Any IDE (e.g., IntelliJ IDEA, Eclipse, VS Code)

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Running the Code

1. Clone the repository:

git clone https://github.com/mulangonando/Object-Oriented-Programming.git

2. Navigate to a topic or exercise:

cd exercises/inheritance

3. Compile and run:

javac Main.java
java Main

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💡 How to Use This Repository

• Start with the topics to understand concepts
• Review examples to see how they are applied
• Solve exercises without looking at solutions first
• Use solutions to verify and improve your approach

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🎯 Learning Goals

By working through this repository, you will:

• Build a strong foundation in Java OOP
• Learn to design clean and maintainable code
• Understand real-world object-oriented design
• Improve problem-solving skills

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🤝 Contributing

Contributions are welcome!

You can:

• Add new exercises
• Improve explanations
• Fix bugs or typos
• Suggest better solutions

Please open an issue or submit a pull request.

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📄 License

This project is open-source and available under the Apache License 2.0.

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⭐ Support

If you find this repository helpful:

• Star the repo
• Share it with others
• Use it in your learning or teaching