Java Runtime Envirronement (JRE) Installation
A Java runtime environnement (JRE) is required to use DiscoveryMat. Depending on the way you choose to install DiscoveryMat software, you need or don't need to install yourself the JRE. According to the installation technique you have chosen, the JRE is already included in the DiscoveryMat software. You need only to install yourself a JRE in the folowing case:
Recommended JRE version is 21.
Windows
For Windows, you can download the Java runtime JRE at this official link: Download 64 bits JRE
Linux Ubuntu Install
First, it can be useful to uninstall any old JRE/JDK version. See above section for uninstall. Note that DiscoveryMat requires at least 21 JRE.
Example: Ubuntu 22.04
sudo apt-get update
sudo apt-get install openjdk-21-jre
Linux Ubuntu Uninstall
Example : Ubuntu 22.04
You can previously uninstall older version by example like this:
sudo apt-get remove --purge oracle-java8-installer
sudo apt-get remove --purge openjdk-11-jdk
sudo apt-get remove --purge openjdk-11-jre
Tip
You can see which is the installed version with the following commands:
java -version
dpkg --list '*jdk*'
dpkg --list '*jre*'
dpkg --list '*oracle*'