August 2004
Intermediate to advanced
480 pages
9h 41m
English
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Autoboxing
As wonderful as the primitive wrappers are, they often mean we end up creating a lot of objects (say with valueOf(int i)), passing them into a list, and then putting them back into their primitive values again with intValue()) when we drag them out of the list.
Autoboxing is a feature new to Java 1.5 that takes care of this for us. Here's how it works in a nutshell. Create a primitive type. Pass it as an argument to a method that expects an Object. It magically works. The JVM converts the primitive to its corresponding wrapper on-the-fly for you.
Autoboxing wouldn't be complete without auto-unboxing. As you might guess, this means that when you ask for a primitive directly from an Object wrapper, ye shall receive.
Because this concept ...
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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.