Problems remain using Java apps

[David Baron <d_baron@012.net.il>]

I now have java on path, JAVA_HOME, CLASSPATH. Problems remain.

Netbeans, which one worked, then kicked me off X, now get the following:
Error occurred during initialization of VM
java/lang/NoClassDefFoundError: java/lang/Object

Another swing app does what Netbeans used to: Cannot convert some string ... 
and then kicks me off X. I cannot save the whole message because I am kicked 
out.

Here are env entries:
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/usr/local/sbin:/usr/local/bin:/usr/games:/usr/java/j2sdk1.4.2_04/bin
JAVA_HOME=/usr/java/j2sdk1.4.2_04/jre
CLASSPATH=/usr/java/j2sdk1.4.2_04/jre/lib/rt.jar

Would those "dummy" packages for Sun Java make an diffrence?
I am running Debian, 2.6.5-4 kernel, KDE. Jave is from Sun, RPM converted to 
DEB and installed.