Java Parameters

For debugging many project use next too helpful java parameters:
-verbose:class - Display information about each class loaded.
-Dproperty=value - Set a system property value.
  for example:   -Djava.endorsed.dirs=C:/jboss-5.1.0.GA/lib/endorsed/ sets endorsed libon JBoss startup

For more information see http://java.sun.com/javase/6/docs/technotes/tools/solaris/java.html