GNU/Linux Elementary OS 5 Install Java OpenJDK 12 – Step by step Guide
How to Install Oracle-Sun OpenJDK 12 JRE/JDK on Elementary OS 5.0-Juno/5.1-Hera LTS GNU+Linux desktop.
And Java OpenJDK 12 for Elementary OS (Open Java Development Kit) is a Free and Open Source Implementation of the Java Platform, Standard Edition (Java SE).
Moreover, the Oracle Java JDK/JRE is based on the OpenJDK Source Code. In Addition, it contains Closed-Source Components.
Finally, OpenJDK 12 is the First, Java Long Term Support Release.

1. Launching Shell Emulator
Open a Terminal window
(Press “Enter” to Execute Commands).
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