Running JAR file on Windows

Question

I have a JAR file named helloworld.jar. In order to run it, I\'m executing the following command in a command-line window:

Answer 1

I´m running Windows 7 x64 and was unable to use any of these fixes.

This one worked for me afterall:

http://thepanz.netsons.org/post/windows7-jar-file-association-broken-with-nokia-ovi

There is an archive which you can download containing a .bat file to run, but check the path of the actual javaw.exe!!!!