This post explains how to install Java or check which version is running on your machine. Install on any OS, and learn about the JDK.

If you have a need for Java Servlets, you'll probably want to deploy Tomcat. Jack Wallen walks you through this process on the Ubuntu Server 16.04 platform.

The default-java folder is a symbolic link to the actual location of the JDK install on Ubuntu. When you reference the JDK install location in applications or in environment variables such as ...