Is it possible to start a JAVA - program directly from a Baan-Script.
We want to give parameters to the Java -Program and want to
get back a result-value.

Check this link:

http://www.baanboard.com/programmers_manual_baanerp_help_functions_starting_and_stopping_programs_run_baan_prog_run_prog

For getting the result value back, your Java Program could write the result value into a file using System.out.println(...), and the Baan program could read it by seq.* functions.

Hope this helps
Uli