Hi Anita,
The link was a general overview of the Java system backup as your question was indeed very general.
There is not much to say about offline backup; make sure you backup everything including the JDK installation directory as well.
Would you care to explain what is the connection of an offline backup of a NW 7.3 JAVA system and the CI export option in the sapinst (SWPM)?
Please explain in detail what is that you are trying to do? An offline backup, an installation or a system copy?
It is not very clear to me.
Best regards,
Menelaos