Chapter 14

   

Java™ 2 Primer Plus
By Steven Haines, Steve Potts

Table of Contents
Appendix C.  Answers to Review Questions


A1:

Representing events as objects allows for a more sophisticated interaction between the object that generated the event and the event listener. Many methods can be used to query the details of the event.

A2:

Declaring an object to be listener registers the fact that it wants to be notified with the event-generating object. This is more efficient than the polling-type approach used in JDK 1.01.

A3:

A semantic event is a high-level event like a button click or a list selection. A low-level event is like a mouse movement.

A4:

Adapter classes are special classes in the JDK that implement an interface for you and provide a dummy version of every required method. You can extend this class and override only the methods that you really want to use.


       
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    Java 2 Primer Plus
    Java 2 Primer Plus
    ISBN: 0672324156
    EAN: 2147483647
    Year: 2001
    Pages: 332

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