Basic HTML version of Foils prepared May 12 1996

Foil 118 Actions associated with Components in AWT - I

From CRPC Lectures on Java Language Applets Graphics CRPC Annual Meeting Tutorial -- May 14,1996. by Geoffrey C. Fox


1 We already discussed handling Mouse and Keyboard Events. These AWT components come with new actions which need to be handled with an action() method in your applet
2 Put action ( a method of class Component) in Container instance that is at lowest possible level so you can customize action to things in that Container
3 action(Event evt, Object arg)'s are looked for in same fashion as exceptions. Scan up Containers looking for a method of this name. Scanning stops when you find an action and that method returns true
4 evt.target holds the object that caused the Event
5 Object Arg returned depends on particular Component invoked
6 There are further evt.id's associated with the various peculiar Components -- see description of class Event for current detailed description.

in Table To:


Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

If you have any comments about this server, send e-mail to webmaster@npac.syr.edu.

Page produced by wwwfoil on Sun Dec 14 1997