Here is a <a
  href="https://www.jetbrains.com/idea/"
  target="_blank"
  style="color: #ff8a00; font-weight: 600; text-decoration: underline; text-underline-offset: 2px"
  onmouseover="this.style.color='#ff0000'"
  onmouseout="this.style.color='#d27204'"
  >link</a>  to the official JetBrains website (IntelliJ IDEA is a JetBrains product).

- Scroll down and choose a **Community Edition** (because it is free) and press the download button:

- Wait until file is loaded, and then open it:

- You have successfully installed the IntelliJ IDEA on your device. 


Finally, we can start learning Object-Oriented Programming (OOP) in Java. It will be challenging, but I'm confident that you'll succeed! In this section, we'll cover all the principles of OOP, explain why OOP is important. You'll learn how to inherit classes, overload and override methods, encapsulate data from other classes, and work with abstraction. Moreover, you'll reinforce all these theoretical concepts with practical exercises, working on assignments in your IDE. You'll gain a wealth of knowledge, both practical and theoretical, so let's get started!

In the previous section, we concluded that all Object-Oriented Programming is mainly built on abstraction. However, an abstract class has one significant limitation – you can inherit from only one abstract class. But what if we need more?
Interfaces come to the rescue. In this section, you will learn what an interface is, why it's necessary, how to use it correctly, and you will continue practicing Object-Oriented Programming. Let's turn you into a professional!

Java OOP

Installing IntelliJ IDEA (Windows)

How to install?