August 2004
Intermediate to advanced
480 pages
9h 41m
English
Content preview from Java GarageBecome 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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Using an Abstract Class Polymorphically
A chief benefit of object-oriented programming is polymorphism. Abstract classes are one way that Java supports polymorphism. That is an issue best left for another topic all to itself. But here, let's look at what is perhaps the most common reason people make abstract classes in the first place: to get flexibility in their design.
Say you have a little Dungeons and Dragons type game where some hero fights monsters. In this adventure, it is possible for the Hero (we'll make him a class) can encounter Serpents or Goblins. Looking at our requirements, we might determine that a Serpent and a Goblin have certain traits in common. They are both monsters. Let's put a capital M on that and make it a class: Monster. ...
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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.