I believe Java can use COM, but I'm not Java developer, so I cannot provide details.

Is it possible to use Java to "Interactively" communicate with the com
instead of examine the log file after running (which is already successfully implemented), is there anyway like,
user could provide parameter, and my program call the com, and then if access denied, i may require user re-enter the credential.
I found it's difficult to grab the outputstream again

Many Thanks