When used with the "Redirect category shell" (Rcat shell) template:

This page is a redirect. The following categories are used to track and monitor this redirect: From a Java package name: This is a redirect from a Java package name, or the fully-qualified name of a Java class or interface, to the software project or language feature that provides that package, or the computer-science concept that it implements. When appropriate, protection levels are automatically sensed, described and categorized.

Template {{Redirect category shell}} may be used to add one or more rcat templates, along with their parameters and categories, to a redirect. For more information see the documentation page below.

When used by itself: