The source code, class files, a sample html file for driving the applet (quad.html), a cgi script to which the applet connects in order to write to the server (testout4.pl) and associated documentation and data files are included in the file src.tar.Z. After the user receives the file as (for example) src.tar.Z, the user will have to uncompress the file with the command (for example) uncompress src.tar.Z, and then untar the resulting file with the command (for example) tar xvf src.tar. Some of the code is in eight packages. This code will be placed in eight subdirectories of the directory in which you untar src.tar. For the package nature of this Java code to work (see the README.html file), the directory in which you untar src.tar should lie in your CLASSPATH.
Please read the README.html, copyright, and disclaimer files.