Hello Yang,
You may already know that ILL is developing new instrument control
software, in which UB matrix manipulation is an integral part. This
will be operational on some ILL diffractometers this year, and is being
developed in C++ not Java. If you are interested you might contact
Frederik
The SCHAKAL structure plotting software (PC and UNIX) by Egbert
Keller has been transferred into the public domain and is now freely
available via the web:
http://www.krist.uni-freiburg.de/ki/Mitarbeiter/Keller/schakal.html
SCHAKAL functionality is listed at:
http://www.krist.uni-freiburg.