@Override
    public void onJoyButtonEvent(JoyButtonEvent evt) {
        if (!eventsPermitted) {
            throw new UnsupportedOperationException("JoyInput has raised an event at an illegal time.");
        }

        inputQueue.add(evt);
    }
Callback from RawInputListener. Do not use.
jme3-core/src/main/java/com/jme3/input/InputManager.java