There are many acronyms in the Java world. Here's a list of some commonly used acronyms and what they mean.
JCP - Java Community Process
The Java Community Process is simply the process by which Java EE was developed. It's an open process that anyone can apply to become a part of. To find out more about the JCP, visit their website: https://www.jcp.org
If you don’t already have a JDK installed, you’ll need to download and install one before you can deploy Payara Server. We recommend Zulu®, an OpenJDK that is fully compliant with the Java SE standard, 100% open source, and can be downloaded and used for free. Also, should you ever purchase support for the Payara Platform, support for Zulu OpenJDK is included.
Download Zulu OpenJDK from their website: https://www.azul.com/downloads/zulu/
You probably know that a DAS, or Domain Administration Server is an instance of Payara Server, but you probably don't know that from the console of Payara Server you can now manage an instance of Payara Micro directly from the DAS. This means from within the admin console you can send your asadmin commands directly to any Payara Micro instance within your cluster.
Watch this quick video to learn how to install the open (Java Development Kit) JDK 8 by Azul Systems called Zulu. A JDK is needed to write Java apps. We'll take you step by step through the process of checking to make sure you don't already have a JDK installed through to installation of Zulu.
Follow the steps in this 2 minute video to install NetBeans IDE on Ubuntu so you can get started developing Java EE applications on Payara Server or Payara Micro. Before you start, make sure you have a JDK installed (not just the JRE).