September 2005
Beginner
576 pages
13h 6m
English
Content preview from SAMS Teach Yourself Programming with Java™ in 24 Hours, FOURTH 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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Building an Inheritance Hierarchy
Inheritance, which enables a variety of related classes to be developed without a lot of redundant work, makes it possible for code to be passed down from one class to another class to another class. This organization of classes is called a class hierarchy, and all of the standard classes you can use in your Java programs are part of a hierarchy.
Understanding a hierarchy is easier if you understand what subclasses and superclasses are. A class that inherits from another class is called a subclass, and the class that is inherited from is called a superclass.
In the preceding War Games example, the Modem class is the superclass of the ErrorCorrectionModem class. ErrorCorrectionModem is the subclass of Modem. A ...
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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.