Download the latest release version of the jAgg library from SourceForge.net.
To use the jAgg library, place the jagg-core jar in the classpath.
The jAgg library does not depend on any third-party libraries, but it does rely on JUnit 4.8.2 for JUnit test cases when building through Maven.
It is possible to build jAgg directly from its source code, if the latest unreleased changes are needed. Use a Subversion client to get the source code and Apache Maven to build it. Here are the steps:
svn co https://jagg.svn.sourceforge.net/svnroot/jagg/trunk jagg
mvn clean install