how to write a mouse listener

http://docs.oracle.com/javase/tutorial/uiswing/events/mouselistener.html


@
http://docs.oracle.com/javase/1.4.2/docs/api/java/awt/event/MouseEvent.html

@system level :
http://stackoverflow.com/questions/504559/is-it-possible-to-have-a-mousemotionlistener-listen-to-all-system-mouse-motion-e