Debian OpenJDK Installation Guide
You are Welcome! The linked Tutorials Show You Step-by-Step How to Install Oracle-Sun Java OpenJDK JRE/JDK on Debian GNU/Linux Distribution.
And the OpenJDK for Debian (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.