The JSOFA software is a pure Java translation of the International Astronomical Union's C SOFA software library (version 20160729) at http://www.iausofa.org/.
For more information on using please read the javadoc overview.
A jar (Java version 1.7) of the software can be obtained from the local Maven repository http://astrogrid.jb.man.ac.uk/maven/ directly by clicking the links in the sidebar and if using maven as a build tool by including the following in the POM
<dependency> <groupId>org.jastronomy</groupId> <artifactId>jsofa</artifactId> <version>20160729</version> </dependency>
The source code is on GitHub