GNU/Linux Ubuntu 20.04 Installing Java OpenJDK 15 – Quick-Start Guide
Hi! The Tutorial shows you Step-by-Step How to Install Oracle-Sun OpenJDK 15 JRE/JDK on Ubuntu 20.04 Focal LTS 64-bit GNU+Linux Desktop/Server.
And Java OpenJDK 15 for Ubuntu Focal (Open Java Development Kit) is a Free and Open Source Implementation of the Java Platform, Standard Edition (Java SE).
Furthermore, the Oracle Java JDK/JRE is based on the OpenJDK Source Code. In Addition, it contains Closed-Source Components.
Finally, OpenJDK 15 is the First, Java Long Term Support Release.

1. Launching Shell Emulator
Open a Terminal window
Ctrl+Alt+t on Desktop
(Press “Enter” to Execute Commands).
Contents
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