The jar task creates a deliverable jar file based on the contents of the ${basedir}/target/classes directory, generates a md5 file, and optionally creates an asc signature file.

<x:jar/>

package:
    [mkdir] Created dir: F:\dev\avalon\planet\tutorials\dynamics\target\deliverables\jars
      [jar] Building jar: F:\dev\avalon\planet\tutorials\dynamics\target\deliverables\jars\dynamics.jar
    [x:jar] Creating md5 checksum