October 2011
Beginner
432 pages
10h 18m
English
Content preview from Sams Teach Yourself Java™ in 24 Hours, Sixth EditionBecome 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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Getting Your Programs to Listen
A user event in Java is something that happens when a user performs an action with the mouse, keyboard, or another input device.
Before you can receive events, you must learn how to make an object listen. Responding to user events requires the use of one or more EventListener interfaces. Interfaces are a feature of object-oriented programming in Java that enable a class to inherit behavior it would not be able to employ otherwise. They’re like a contract agreement with other classes that guarantee the class will contain specific methods.
An EventListener interface contains methods that receive user input of a specific type.
Adding an EventListener interface requires two things. First, because the listening classes ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.