JSubViewer is hosted at http://sourceforge.net/projects/jsubviewer/ , you can find source code etc there. The build.xml file in the main directory of the repository is used for compiling and building. It requires launch4j (http://launch4j.sourceforge.net/) to be downloaded and extracted to a launch4j subdirectory in that same directory. If you do not need to build the exe's, you can remove the launch4j taskdef from the build file.
maryskagda