I can use
Java web start to start my Swing GUI application on the command line:
javaws
http://localhost:7001/webstart/myapp/launch.jnlp
How to find out the variables' value ($$codebase, $$name, etc) in the launch.jnlp file?
Is there a "println" or "echo" command?
The launch.jnlp file is as follows: