Java implementations map package and subpackage names to same-named directories. For example, an implementation would map graphics to a directory named graphics.

The Java 2 SDK organizes its vast collection of classes and interfaces into a tree-like hierarchy of packages within packages, which is equivalent to directories within directories.

Canonical has announced that OpenJDK 11 has become the default Java package on Ubuntu 18.04 LTS, replacing OpenJDK 10. The move comes days after Red Hat announced its stewardship of OpenJDK 11.