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.

cpp17.tar.gz

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

# Problem Statement

You are given a partially completed code of a `Rectangle` class in the editor. Add two fields i.e. `length` and `width` and modify the default and parametrized constructors which assign parameters to the `length` and `width` fields of the `Rectangle` class.
In the end, Implement the `getArea()` method which returns the area of the rectangle.


## Input
    Calls the constructor by passing length and width.
    Calls the `getArea()` method to return the area.

## Output
    Returns the area of a rectangle.

## Sample Input

```Java
        Rectangle obj = new Rectangle(2, 2);
```

## Sample Output
```Java
        4
```



Can you implement the rectangle class using the concepts of encapsulation? A solution is placed in the "solution" section to help you, but we would suggest you try to solve it on your own first.

Introduction to Object-Oriented Programming

Classes and Objects

Project: Amazon's Top 50 Bestselling Books Dataset

Data Hiding

Composition, Aggregation and Association

Project: Java Slam Dunk: Coding Skills Through Basketball

Object Oriented Programming in Java - Exam I

Inheritance

Polymorphism

Abstract Classes and Interfaces

Project: Doctor on Call

Object Oriented Programming in Java - Exam II

Challenge 1: Implement the Rectangle Class Using the Concepts of Encapsulation

Problem Statement