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

## Re-usability
Inheritance makes the code reusable. Consider that you are up for designing a banking system using classes. Your model might have these:
* A base `BankAccount` class
* A derived class named `SavingsAccount`
* A derived class named `CheckingAccount`



# Re-usability
Inheritance makes the code reusable. Consider that you are up for designing a banking system using classes. Your model might have these:
* A base `BankAccount` class
* A derived class named `SavingsAccount`
* A derived class named `CheckingAccount`



In this lesson, you'll get to know about the advantages of using Inheritance.

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

Advantages of Inheritance

Re-usability