June 1997
Intermediate to advanced
318 pages
8h 17m
English
Content preview from Developing Java BeansBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Events in the AWT Package
The
components in the java.awt package use the same
event model that I’ve just described. Many of the components in
the package send event notifications for things such as mouse clicks,
button presses, and window resizings. There are a number of standard
classes and interfaces available in java.awt.event
for dealing with such events and event notifications.
It’s
interesting to take a look at some of these more closely to see how
they are used and how they behave. This will give you some more
insight into how the event model works, and how it is employed by one
of the core Java packages.
java.awt.Component
is the base class for many components in
the AWT package. It provides a great deal of functionality that is
shared by all components. As such, there are also a number of events
that are fired by all components. These events are grouped into a
number of event-listener interfaces, which provide methods that are
invoked when their associated events occur. Each of these interfaces
extends java.util.EventListener. For each of these
event-listener interfaces, there is also an event object class used
to encapsulate any specific information related to an instance of the
event. These event classes all extend the class
java.awt.AWTEvent, which is a subclass of
java.util.EventObject.
Let’s take a look at one of the event interfaces supported by
the java.awt.Component class. This interface,
java.awt.event.MouseListener
, is used to provide notifications of events ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.