August 2005
Beginner to intermediate
130 pages
2h 30m
English
Content preview from Eclipse IDE Pocket Guide
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Java Build Path
If you've done any Java programming before, you're familiar with the Java classpath—a list of directories and JAR files containing Java classes that make up the program. Usually this is controlled by an environment variable (CLASSPATH) or a command-line option (-cp).
In Eclipse, classpath details are a little more complicated. The first thing to realize is that Eclipse doesn't use the CLASSPATH environment variable. It understands and controls the location of all classes itself. Additionally, Eclipse makes a distinction between runtime and build (compile) time. In Eclipse terminology, classpath refers only to the runtime class list, while build path refers to the compile-time list. These two paths may be different, but, by default, they will both be set to the list you specify in the build path.
To see the build path, right-click on your project and select Properties → Java Build Path. A dialog will appear, with the tabs described in Table 6.
Table 6-1. Java Build Path tabs
|
Tab name |
Description |
|---|---|
|
Source |
Tell the Java compiler where your source code is located. Each source directory is the root of a package tree. You can also control where generated output files (such as .class files) go. |
|
Projects |
Make the current project depend on other projects. Classes in the other projects will be recognized at build time and runtime. The other projects do not have to be built into a JAR file before referring to them in Eclipse; this cuts down on development time. |
|
Libraries |
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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.