Basic HTML version of Foils prepared March 23 98

Foil 39 JavaBean and JDK1.1 AWT Event Model

From JavaBeans and Use in ComponentWare Basic Information Track Computational Science Course CPS616 -- March 25 1998. by Nancy McCracken, Geoffrey C. Fox, Wojtek Furmanski
The various listeners and events are named in pairs XListener (an interface extending java.util.EventListener) and XEvent (an object extending java.util.EventObject)
Registration involves methods for the source called
  • public void addXListener ( XListener callbackobject)
  • public void removeXListener ( XListener callbackobject)
  • These increment or decrement an array of listeners which the source must keep
Such naming conventions are part of the design pattern for the JavaBean (JDK1.1) framework
X = Component, Focus, Key, Mouse, MouseMotion, Window, Container, Text, Action, Adjustment and Item in JDK1.1 AWT

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