Xlet lifespan

I understand an Xlet's startXlet method should return rather quickly. If startXlet doesn't spawn any threads does the xlet die and get gargage collected or is there some implicit thread that gets started on it behave that keeps it around ? If I have a non-graphical xlet that just registers some listeners do I need to spawn a thread to keep it alive ?

[361 byte] By [dozensa] at [2007-9-25]