===== Install JAVA =====
 
==== Linux Open SUSE Leap 15.2 =====

Run the following commands to install JAVA openjdk 15

  zypper up
  zypper ar http://download.opensuse.org/repositories/Java:/Factory/openSUSE_Leap_15.2/ java
  zypper mr -p 70 java
  zypper refresh
  zypper in java-15-openjdk
  java --version


If a JAVA version is already installed on your system before the installation of openjdk 15, use alternatives command to change the java version used by your system.

  alternatives --config java                        # In case of upgrade: Switches the links to point to the new version
  # logout and login again to have the environment variables defined.

==== Linux CentOS/RedHat =====

  * Use the existing package installer (apt or yum for example) to install latest GA version of JAVA OpenJDK (currently 15)
  * Example on CentOS: 

  yum install java-latest-openjdk-headless.x86_64   # Installs the latest OpenJDK binaries
  alternatives --config java                        # In case of upgrade: Switches the links to point to the new version
  java -version                                     # Check you run the latest version 

  * Or download the Linux/x64 archive from https://jdk.java.net/ and decompress it in your usual Java install path and update /usr/bin/java link
  * Refer to the online documentation specific to your Linux distribution