With Java installed on Ubuntu and the JAVA_HOME environment variable properly configured, you're ready to start using and enjoying all your favorite Java-based software.

The JAVA_HOME environment variable should point to the root of the directory in which you installed the JDK and you should add the JAVA_HOME/bin directory to your PATH environment variable.

Pointing your JAVA_HOME environment variable to the JDK’s installation directory enables any external Java-dependent software that you might subsequently install to locate your JDK installation.

If you want to download and install Java JDK 18 on Windows 11/10 computer, you will also have to set up a Path in Environment Variable.