juniorJava
What is Object-Oriented Programming?
Updated May 6, 2026
Short answer
OOP is a programming paradigm based on objects containing data and behavior.
Deep explanation
It includes four pillars: encapsulation, inheritance, polymorphism, and abstraction. It helps in modular, reusable, and maintainable code design.
Real-world example
Modeling real-world systems like a car rental system or banking system.
Common mistakes
- Using OOP only as class creation without proper design principles.
Follow-up questions
- What are OOP pillars?
- Why is OOP important?