1) How to find Java version ?

  - in the taskbar's search box, type Java. If you don't have Java installed, go to step 'Install Java'.

  - choose 'Configure Java' from the search results

  - a 'Java Control Panel' window opens  (preview)

  - in 'Java' tab, click on 'view' button  (preview)

  - A window displays the list of Java installed  (preview)

  - verify the version (1.8 or more) and, if necessary, go to step 'Update Java'

2) Update Java

  - in 'Update' tab, click on 'Update Now' button  (preview)

  - follow instructions.

3) Install Java

  - go directly to the Java site for installation

1) How to find Java version ?

  - open a terminal.

  - enter the command java -version and verify the version (1.8 or more)

  - if Java is not installed or if the version number is less than 8, go to step 'Install/Update Java'

2) Install/Update Java

  - open a terminal and execute :

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install openjdk-8-jdk