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OOP Concepts in Java
Master Object-Oriented Programming (OOP) in Java with real-world analogies and practical code. Learn about encapsulation, inheritance, abstraction, and polymorphism in a beginner-friendly way.
7 min readApr 3, 2025
Whether you’re building a small utility or a large-scale web app, understanding Object-Oriented Programming (OOP) is essential for writing clean, modular, and reusable Java code.
Java is 100% object-oriented (except for primitives), and mastering OOP concepts will help you:
- Think in terms of real-world objects.
- Reduce duplication (DRY principle).
- Create a scalable software architecture.
In this guide, you’ll learn the four core OOP principles with real-world examples and Java code snippets.
📦 1. Encapsulation — Wrapping Data for Protection
Encapsulation is the binding of data (fields) and the code (methods) that manipulates it into a single unit (class), while restricting direct access to that data.
