GNU/Linux KDE Neon Installing Java OpenJDK Guide
Hi! The linked Tutorials Show you Step-by-Step How to Install and Getting-Started with Oracle-Sun Java OpenJDK JRE/JDK in KDE Neon GNU/Linux Desktops.
The OpenJDK (Open Java Development Kit) is a Free and Open Source Implementation of the Java Platform, Standard Edition (Java SE).
Oracle Java JDK/JRE Installation is based on the OpenJDK source code. In Addition, it contains Closed-Source Components.
How to Download and Install Oracle JDK on Linux Distros
GNU/Linux KDE Neon Java OpenJdk Installation Guide