Executing a executable .jar file

[angrylolrus]

I've been working on a game, and up until now, I was using just a .bat file to launch it outside of my editor (JGrasp). In the interest of making it multi-platform, I've made it into an executable .jar file. Problem is, running the .jar file doesn't do anything. No output, no errors, no windows, nothing. Ordinarily, it puts all its output into a dos window, when I use the .bat file, or when I run it with JGrasp. Even if I use the console to execute the .jar, it doesn't work, it just goes onto the next line.

Is there something I have to do with my code to make it print out into a dos window? I know my .jar file is done properly (with a manifest, with all the classes, and with the other necessary files), I did it first manually (using the command prompt) and later I used the JGrasp jar creator, so I know that it should be working. But, for some reason, it doesn't do anything. Thanks for you help!

[DarrylBurke]

You have to execute the .jar with the java executable. Not the javaw executable, which is usually the default, and which doesn't open a command prompt (useful for GUI applications).

db

[angrylolrus]

SO then how would I tell it to launch the jar with java instead of javaw everytime?

[Fubarable]

What you need to do is to set your OS to launch the jar file with java.