initjvm.sql : 
loads the  initial set of Java classes necessary to
support Java, initializes the SQL  tables for the
CORBA namespace, and publishes some top-level entry
points  through call specifications.  

rmjvm.sql :
removes any trace of Java usage.  This includes core
classes,  user created classes, and all the Java 
objects from the data dictionary.  It should only be
run if you wish to remove all Java objects from a
database.  Once this script is run, all of your Java 
objects will be gone, unless you  have a backup.