Hi Andreas,
I guess this file was created by yourself; at least I haven’t heard of it before.
It’s a bit annoying indeed that batch scripts will always open a console window (and for reasons of compatibility with older versions of Windows, they are still our preferred way to define start scripts). You can at least ensure that the window is automatically closed after the start if the java GUI process is started with "start javaw" or (depending on your configuration) with "run java". Another alternative is to create a link (.lnk) with a direct Java call (javaw -cp ...).
Hope this helps, looking forward to the experiences of other users, Christian