Does someone knows a utility which can determine which are the needed
jars to run a program.

Recently, I tried to use Betwixt of the Jakarta project, and I had
successively to add commons-digester.jar, commons-collections.jar,
commons-logging.jar, commons-beanutils.jar in the classpath to fix the
java.lang.NoClassDefFoundError exceptions I had raised.

That's why I'm asking myself if there isn't a tool which can find the
missing classes and, eventually, look for the jars that contains them.

I already use an Eclipse plug-in (Jar Class Finder) which scans all
the jars of a specified directory, searching a class name.
This kind of utility could be a part of the solution.