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Accept the Privacy Policy and the option to send data. You will then be prompted with a window to customize IntelliJ.

4.Select your Default UI Theme and then click “Skip Remaining and Set Defaults”. The UI theme and other settings can always be changed later:

IntelliJ IDEA Config

You should now have IntelliJ IDEA installed on your Mac!

WINDOWS USERS

1.Download and run the installer (.exe) from the download page.

IntelliJ IDEA Config

2.Choose the default install location and menu.

IntelliJ IDEA Install Location

3.Configure associations and Desktop shortcuts.

• Desktop Shortcut: You can either create a shortcut for both launchers or each one individually. A 64-bit launcher is advisable if you’re working on multiple and/or large scale projects since it allocates moreRAM.
• Update Path Variable: Updating the PATH variable will allow you to use the command line to run projects in IntelliJ.
• Update context menu: This will allow you to choose your directory with all your Java files.
• Associations: These options will associate the files with the IDE in the system so that when you click on the files with these extensions in your file manager (Windows Explorer), they will open in the IDE. We’ll be creating associations with.java,.kt, and.kts.
• Install 32-bit Jetbrains Runtime: This installs the runtime and must be checked if you’re creating a 32-bit launcher. Otherwise, the runtime comes bundled with the 64-bit launcher.

IntelliJ IDEA associations

4.Choose your start menu folder. The default option will create a JetBrains folder in your start menu.

IntelliJ IDEA Start Menu Folder

5.Complete your installation 🎉

IntelliJ IDEA Complete Installation

6.Select your default UI Theme and then “Skip Remaining and Set defaults”.

IntelliJ IDEA Customize

You should now have IntelliJ IDEA installed on your Windows machine!

Creating your first Kotlin project

1.After installation, launch IntelliJ and you’ll see a Welcome dialog with a few options to create a new project or open an existing project. Click on “Create New Project”:

Welcome dialog

2.The new Project window will have a few languages on the left panel. Make sureJavais selected. You will need the Java SDK in order to create the project; if you don’t have it downloaded, you can click on the dropdown and select “Download JDK”:

Download JDK

3.Under “Additional Libraries and Frameworks”, selectKotlin/JVMand clickNext:

Additional Frameworks

4.Name the projectHelloWorldand clickFinish:

Project Name

5.On the left-hand panel, expand theHelloWorldfolder and right-click on thesrcfolder. Navigate toNewand thenKotlin file/Class:

Create a new Kotlin file

6.Name the new fileHelloWorld:

New file name

7.In the newly created file, insert the following code snippet:

fun main () {   println("Hello, world!")}
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fun main () {   println("Hello, world!")}

8.In order to run the file, click on the green arrow on the left side of code snippet and selectRun HelloWorldKt. Alternatively, you can use the keyboard shortcut, Control(⌃) + Shift + R:

Run the program

9.Once compiled successfully, the output of the program should appear at the bottom of the screen:

Program output

Congratulations! You now have your first Kotlin application running with IntelliJ.

While IntelliJ is aimed for Javaprogramming, the IDE has extensive assistance for a variety of languages such as Python, SQL,Javascript, HTML, Kotlin, and many more. With IntelliJ, your software development process will be more streamlined, and less error-prone. The main coding principle that IntelliJ focuses on is writing code with the least amount of distractions as possible. With dedicated shortcuts and features, you’ll be able to code in a much more efficient and faster way.

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