How can I associate file extensions with Web Start apps under Windows?
It’s quite a challenge because Web Start doesn’t support any command line arguments other then the app’s URL (e.g. javaws http://www.jenomics.de/vamp/venus.jnlp). The hard part is to figure out how to add more command line arguments. One method is to lobby Sun, another is to create your own Web Start clone. Once you succeeded all that’s left to do is to add some registry entries to associate your app with your file extension of choice using Windows-only native code.