Javagiac is a java native interface to the giac computer
algebra system C++ library.
Get it for
Untar the archive, then read the file java.README for
futher install instructions. There is a small runme file
in the javagiac directory, if your install is OK,
java javagiac.runme should work. You can modify the
example file, or import all the java files (except runme)
in your prefered development environment (eclipse, netbeans...).