GNU/Linux Xubuntu 18.04 Installing Java JDK Guide
How to Install Oracle Java SE Development Kit on Xubuntu 18.04 Bionic LTS GNU/Linux – Step by step Tutorial.
And the Oracle Java SE Xubuntu Bionic Release includes:
- OpenJDK Java Development Kit
- Oracle Java Development Kit
Moreover, the Java OpenJDK (Open Java Development Kit) is the Free and Open Source Implementation of the Java Platform, Standard Edition (Java SE).
Where the Oracle JRE/JDK is based on the OpenJDK Source Code. In Addition, it contains Closed-Source Components.

GNU/Linux Xubuntu 18.04 Java Development Kit Installation Guide