November 2004
Intermediate to advanced
1024 pages
27h 50m
English
Content preview from Core Java™ 2 Volume II - Advanced Features, Seventh 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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Addition of Metadata to Programs
Metadata are data about data. In the context of computer programs, metadata are data about the code. A good example for metadata is Javadoc comments. The comments describe the code, but they do not modify its meaning.
Starting with JDK 5.0, you can use annotations to insert arbitrary data into your source code. Why would you want to do this? Metadata are only useful in conjunction with tools. As we write this chapter, there are many promises that useful tools will soon appear. This chapter introduces you to the syntax for annotations and gives examples that demonstrate some of the possibilities. This should help you evaluate the tools that will emerge, and it might even give you ideas for building your own tools. ...
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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.