This program when run fom java webstart don't have the clipboard connected with the operative system
If you need a NMEA checksum calculator visit this link:
http://www.hhhh.org/wiml/proj/nmeaxor.html
With this program you can calculate and check the NMEA sentences checksum used with GPS.
If you insert the NMEA sting on the Command text field and activate the Calculate button the checksum is displayed.
From The Command text field is possible copy the NMEA sentence with the checksum.
If you insert the NMEA sentence with the checksum on the Checksum text field and activate the Checksum button the string is validated.
If the string background become green the checksum is correct, if the background become red the checksum isn't correct.
The program is in java, to start it you can use this link
NMEAchecksum.
Sources
NMEAchecksum_src.zip maked with Netbeans ide.
Program with libraryes
NMEAchecksum.zip
