Recently JetBrains shipped the IntelliJ 2021.1 Beta 3 with an interesting addition; the possibility to compile and run Java programs whose source code is in WSL2. Everything from the Windows version of the IDE.

https://blog.jetbrains.com/idea/2021/01/intellij-idea-2021-1-eap-1/

https://blog.jetbrains.com/idea/2021/02/intellij-idea-2021-1-eap-5/

Let's create a new Java project (Gradle / Maven) inside Pengwin and run it using IntelliJ from Windows

Install Java in Pengwin

Let's prepare Pengwin for run Java project from IntelliJ:

1. Install SDK Man from pengwin-setup. SDK Man is a very versatile distribution manager, where you can install and update not only any supported Java version but also Ant, Gradle, Maven, and many other tools. (https://sdkman.io/sdks)

   $ pengwin-setup update $ pengwin-setup install PROGRAMMING JAVA $ source /etc/profile.d/sdkman.sh

2. List the JVM available and install one of them or simply install the default one.

   $ sdk list java $ sdk install java 11.0.3.hs-adpt # For example

Or the default

$ sdk install java

Create a new project in IntelliJ

1. Create a new Java project. You can choose Java, Gradle, or Maven.
2. Choose the just installed JDK from the drop-down

3. Remember to create the project in Pengwin home: \\wsl$\WLinux\home\user

4. Now refresh the Gradle project (or maven) in IntelliJ and you are ready to start coding, at the IO speed of Linux on Windows:

Additional instructions for Maven

Maven needs some more tweaks:

1. If you haven't installed java from apt, create a symbolic link from the default path

   $ sudo ln -s "$(which java)" /usr/bin/java    
   $ sudo ln -s "$(which javac)" /usr/bin/javac

2. Install Maven using SDKMAN

   $ sdk install maven

Permission problems

Sometimes IntelliJ creates the project and its own cache directory as root, and then itself fails due to permission problems. To fix that execute:

$ cd
$ sudo chown user:user -R .cache # Replace 'user' by your username
$ sudo chown user:user -R untitled # Replace 'user' by your username and 'untitled' by your project folder