Is possible to create a virtual device in jack?

[mageddo]

I am looking for create a virtual microphone and e.g. in a Java application send packets to this microphone then this microphone will be used in any application e.g. Skype.

Is it possible? If yes can you give me a example of how to create this virtual device and how send packets to it? If there already have examples please show me where are they.

P.S. I want to do all this in command line or programatically

Thanks

[magacc1]

+1 I'm also looking for a way to do this, either using Jack or another library. Any pointers?