Nov 19, · There are three participants in event delegation model in Java; - Event Object – the class object which describes the event. An event occurs (like mouse click, key press, etc) which is followed by the event is broadcasted by the event source by invoking an agreed method on all event . Events. In the delegation model, an event is an object that describes a state change in a source. Among other causes, an event can be generated as a consequence of a person interacting with the elements in a graphical user interface. The Java Delegation Event Model. The DEM is an implementation of the Observer or Publish-Subscribe pattern [GHJV95]. Publishers are capable of generating and sending (publishing) events; subscribers register interest (subscribe) in the events of particular publishers.
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