🔹 Introduction Java is a very popular programming language, and one of the biggest reasons for that is its support for Object-Oriented Programming (OOP) . But what is OOP? Simply put: OOP allows you to write your code like you’re describing real-world things — like a car, a student, or a bank account — with their own data and behavior. In this blog, we’ll cover: 4 Pillars of OOP (Encapsulation, Inheritance, Polymorphism, Abstraction) Real-life examples Easy Java code with explanation Let’s make OOP simple! 🔸 1. Encapsulation (Data Ko Chhupana) 💡 Concept: Encapsulation means wrapping the data (variables) and the code (methods) together and hiding the details from outside access. It protects your data. 🧠 Real Life Example: Like an ATM machine — you only press buttons, but don’t see how money is processed inside. ✅ Java Code: java class Student { private String name; // hidden data public void setName (String n) { name =...