..is this the right way to start jdownloader headless on my linux server?

java -Djava.awt.headless=true -jar JDownloader.jar

it is still in foreground on console with this:

Start Update
Update Message: Check for updates
Update Progress: 3%
Update Progress: -1%
Update Message: Contact Server...
Update Message: Check for updates
Update Progress: 0%
set PENDING