Ok I have spent some time to explore my browser history, here are exact
links that I told you,
The following link has the demo , hit for a JWS demo run , satisfy yourself
and then write for you with org.jdesktop.jdic
https://jdic.dev.java.net/

This is the image showing exactly what you want.

https://jdic.dev.java.net/resource/trayicon.gif