Java OpenJDK Quick-Start for Lubuntu Linux
The Linked Linux Tutorials Shows You Step-by-Step How-to Install and Getting-Started with Oracle-Sun Java OpenJDK JRE/JDK 6/7/8/9 on Lubuntu GNU/Linux Distribution.
The OpenJDK (Open Java Development Kit) is a free and Open Source implementation of the Java Platform, Standard Edition (Java SE).
Oracle JDK is based on the OpenJDK source code. In Addition, it contains Closed-Source Components. The final result is licensed under a Binary Code License.