Understanding Object-Oriented Programming in Java
2nd PUBy KarnatakaPUCS Team on 7/10/2026
Object-Oriented Programming (OOP) is a fundamental paradigm in Java. This guide covers the four pillars of OOP and how to apply them effectively.
The Four Pillars of OOP
1. Encapsulation
Encapsulation bundles data and methods together, hiding internal details:
javapublic class BankAccount { private double balance; public void deposit(double amount) { if (amount > 0) ...