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

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 ...

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.