Finding Classes In Multiple Jars or Directories

Very simple find with xargs as the icing on top, in this example we are looking for the package webservices.

find . -name '*.jar' | xargs -i{} -t jar tfv {} | grep -i webservices

If you have a problem and do not have access to the jar utility an alternative could be and also ITS BLAZINGLY FASTER

$ find . -name '*.jar' | xargs -i{} -t unzip -l {} | grep -i sun.awt.X11GraphicsEnvironment