JAVA OOPS CONCEPT
Here's a complete guide to Object-Oriented Programming (OOP) concepts in Java, broken
down into sections.
1. Introduction to OOP in Java
Object-Oriented Programming (OOP) is a programming paradigm based on the concept of
objects, which can contain data (fields) and methods (functions). The main goal of OOP is to
make programs more modular, reusable, and easier to maintain.
2. Core Principles of OOP
Java follows four core principles of OOP:
Encapsulation
Abstraction
Inheritance
Polymorphism
3. Encapsulation
Encapsulation refers to the bundling of data (fields) and methods (functions) that operate on
the data into a single unit called a class. It is also about controlling access to the data by using
access modifiers (private, public, protected).
Key Concepts:
Private Fields: Make the fields private to protect data from being accessed directly
outside the class.
Public Methods: Provide methods (getters and setters) to access and modify the
private fields.
Example:
class Person {
private String name; // private field
// Getter method for name
public String getName() {
return name;
}
// Setter method for name
public void setName(String name) {
this.name = name;
}
}
