In UG A.2.2 (2) the command is:
% java $CLASSPATH com.sun.tdk.signaturetest.SetupAndTest -reference V1.0:$JAVA_HOME/jre/lib/rt.jar -test V2.0:$JAVA_HOME/jre/lib/rt.jar -package example
However launching on Linux machine
java $CLASSPATH
without -jar leads to 'Could not find or load main class' error
% java $CLASSPATH com.sun.tdk.signaturetest.SetupAndTest -reference V1.0:$JAVA_HOME/jre/lib/rt.jar -test V2.0:$JAVA_HOME/jre/lib/rt.jar -package example
However launching on Linux machine
java $CLASSPATH
without -jar leads to 'Could not find or load main class' error