Using DJFractal is just a matter of running a JAR file such as in the
following command:
java -jar djfractal.jar
The djfractal.jar file usually contains all the necessary Mandala classes. So you don't have to download the Mandala library yourself.
To access the download page, visit the Sourceforge Files Page.
You may also download source files using CVS. See the Sourceforge CVS Page for details.