Is there a functional client for Hafen that we can road-test for basic launchability before the game goes live? I know we won't be able to test server connection and such, but it'd be great to get all the Java set-up noise out of the way, provided that's going to be an issue.
Press Windows+R, type in cmd, hit enter. Type in java -version hit enter. If it spurs out info about java version, you're good to go (java 7 at least probably, 8 is the newest). Otherwise lookup an installation guide and install it.