• Please do not vote more than once per resource
• Please submit a variety of ratings so that resources get ratings other than just 1's and 10's

Callback Interfaces

SAX uses the Observer design pattern to tell client applications what’s in a document.[1] Java developers are most familiar with this pattern from the event architecture of the AWT and Swing. In that context, the client programmer implements an interface such as MouseListener that receives events through well-known methods.

http://www.cafeconleche.org/books/xmljava/chapters/ch06s03.html