February 2009
Beginner to intermediate
1200 pages
36h 3m
English
book
Java™ for Programmers: Deitel
by Paul J. Deitel - Deitel & Associates, Inc., Harvey M. Deitel - Deitel & Associates, Inc.
Content preview from Java™ for Programmers: Deitel
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10. Object-Oriented Programming: Polymorphism
Objectives
In this chapter you’ll learn:
• The concept of polymorphism.
• To use overridden methods to effect polymorphism.
• To distinguish between abstract and concrete classes.
• To declare abstract methods to create abstract classes.
• How polymorphism makes systems extensible and maintainable.
• To determine an object’s type at execution time.
• To declare and implement interfaces.
One Ring to rule them all, One Ring to find them, One Ring to bring them all and in the darkness bind them.
—John Ronald Reuel Tolkien
General propositions do not decide concrete cases.
—Oliver Wendell Holmes
A philosopher of imposing stature doesn’t think in a vacuum. Even his most abstract ideas are, to some extent, ...
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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.