Before diving into the "four pillars," you must understand the two fundamental units of any Java program:
: An instance of a class. It is a real-world entity (like a specific "Car" or "Student") that has a state, behavior, and a unique identity. 2. The Four Pillars of OOP oops concepts in java pdf download
: It acts as a protective shield, preventing unauthorized external code from modifying internal data directly. II. Inheritance (Code Reusability) Java OOP(Object Oriented Programming) Concepts Before diving into the "four pillars," you must
: You declare class variables as private and provide public getter and setter methods to access them. The Four Pillars of OOP : It acts
Encapsulation is the practice of bundling data and the methods that act on that data into a single unit (a class).
: A blueprint or template that defines the properties (data) and behaviors (methods) common to all objects of a certain type. It does not occupy memory.
The strength of Java lies in these four principles that work together to simplify complex systems. I. Encapsulation (Data Hiding)