How to attach the source in eclipse using java program? [closed]

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How can i attach the source in eclipse using java program? Can anyone help me??? Thanks in advance..

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Attached sources are stored in the .classpath file in the project root directory, which you can manipulate programmatically. Entries look like this:

<classpathentry kind="lib" path="lib/joda-time-1.6.jar" 
                           sourcepath="/lib/joda-time-1.6-sources.jar"/>

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If you want automatically attached sources, you will probably want to use maven as a system for build and dependency management. It is the only system I know that supports this feature out of the box.

The integration with eclipse is great through either the m2eclipse eclipse plugin or the maven-eclipse-plugin on the maven side. Either way: when a jar mylib-1.2.3.jar is downloaded, maven will automatically look for a jar called mylib-1.2.3-sources.jar and attach it if present (and it is present for most open source projects). It really makes life a lot easier.