What do you need?

jFed requires Java 11 or 12, and we recommend 12.

Oracle’s JDK and OpenJDK based alternatives are supported. Note that the Oracle JDK has some important licensing restrictions. OpenJDK releases receive updates only for 6 months. We advise to use Azul Java.

Older java versions (< 11) are not supported in recent jFed versions.

Verifying your Java installation

To verify your current java installation, open a terminal and execute the java -version command.

Installing Azul Java

Debian / Ubuntu / Mint

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 0xB1998361219BD9C9
sudo apt-add-repository 'deb http://repos.azulsystems.com/ubuntu stable main'

sudo apt-get install zulu-12
sudo update-java-alternatives -s zulu-12-amd64

Arch Linux

Open a terminal, and execute the following command:

sudo pacman -S jdk-openjdk

Note that when java 13 becomes available, the arch java 12 package will change name to “jdk12-openjdk”.

Alternative: Installing Java 12 manually

If you cannot install OpenJDK 12 using your systems package manager, you can manually install OpenJDK 12 (or Azul JDK). This is not recommended, as it probably does not integrate well with your linux distribution’s java.

Full instructions for OpenJDK can be found at the OpenJDK site