How do I switch from CDE to Java Desktop in Solaris 10?

I am a newbie to Solaris/UNIX. I just installed Solaris 10 and accidentally chose CDE as my desktop instead of Java. How can I set Java Desktop as my desktop?
Because before i installed my mechine is using java and more beauty from CDE..

you can choose your desktop at the login screen...

Oh yes...actually it's simple...hahahah
thnks very much..for DUKENUKE2