Explore the fundamentals of OOP in Java. Gain insights into inheritance, polymorphism, and more to write clean, modular, reusable code through interactive exercises and practical challenges.

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Object-oriented programming (OOP) has been around for decades. As the original object-oriented language, Java is a mainstay in the world of computer programming. 

Having a foundation in OOP Java concepts will allow you to write cleaner, more modular, and more reusable code, as well as make it easier for you to understand the codebases of different companies you might be interested in joining.

Starting with the basics and reviewing complex topics like inheritance and polymorphism, this course is filled with illustrations, exercises, quizzes, and hands-on challenges. You’ll walk away with an understanding of classes and objects behavior and be able to easily create simple, efficient, reusable and secure code.

Learn Object-Oriented Programming in Java

# Definition

> The word **Polymorphism** is a combination of two Greek words, **Poly** means *many* and **Morph** means *forms*.



In programming, *polymorphism* refers to the same object exhibiting different forms and behaviors.

For example, take the Shape Class. The exact shape you choose can be anything. It can be a rectangle, a circle, a polygon or a diamond. So, these are all shapes but their properties are different. This is called **Polymorphism**.

Get an introduction to the concept of Polymorphism which is an important concept related to OOP.

Introduction to Object-Oriented Programming

Classes and Objects

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Data Hiding

Composition, Aggregation and Association

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Object Oriented Programming in Java - Exam I

Inheritance

Polymorphism

Abstract Classes and Interfaces

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Object Oriented Programming in Java - Exam II

What is Polymorphism?

Definition