Java Runtime Envirronement (JRE) Installation

java runtime

A java runtime environnement (JRE) is required to use DiscoveryMat. Depend on the way you choose to install DiscoveryMat software, you need or don't need to install yoursel a 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:

  • Installation with portable zip-archive without JRE.
  • Installation with deb or rpm package under Linux.
  • Raspberry Pi version.
  • Recommanded JRE version is 17.

    Windows

    For windows user, you can download a such java runtime JRE at this official link: Download 64 bits JRE

    Tip

    If the link above is no longer valid, enter the following keywords openjdk 17 download in your favorite browser. This keyworlds will help you to find yourself the required download site!

    Linux Ubuntu Install

    First, it can be usefull to uninstall old JRE/JDK version. See above section for uninstall. Note that DiscoveryMat requiert at least a 17 JRE.

    Example : Ubuntu 22.04

    sudo apt-get update

    sudo apt-get install openjdk-17-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 installed version by example like this:

    java -version

    dpkg --list '*jdk*'

    dpkg --list '*jre*'

    dpkg --list '*oracle*'