How to Run a JAR file from inside a JAR file

As the title states...

The outer JAR runs fine, but it doesnt seem to be able to execute the inner jar.

I'm doing:

URL url = BattleArena.class.getClassLoader().getResource("Arena_Server.jar");

System.err.println(url);//prints out a big filename

Runtime.getRuntime().exec("java -jar "+url.getPath());

Message was edited by:

Nether

[463 byte] By [Nethera] at [2007-11-27 4:55:36]