Close tray popup menu when mouse exit

Hi,

I have a small problem (tho i made a workaround for it) .. is it possible to close a JPopupmenu when the mouse has left the JPopupmenu?

I tried to do it with a

public void mouseExited(MouseEvent e) {
}

but it didn't work, any pointers?

I have another questions, i can't bring the jpopup menu in front.
i tried it with toFront() etc but it doesn't work.