tank_hmiViewer Demo files license:

Except for the hmi.jar file which was obtained from the
VISUAL Open Source project (http://visual.sourceforge.net)

(c) 2002 Juan Carlos Orozco

Offered to the public under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
Public License for more details.

This code is made available on the understanding that it will not be
used in safety-critical situations without a full and competent review.