JAVA_HOME is an operating system environment variable that directs a user to the file system location where the JDK or JRE was installed.

This post explains how to use variables in Java. Learn the primitive types (and what that means) and just why variables are so important for any coding!

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 ...