Here I'm zip the same applet that design by prof Hwang but i zip all class files in jar file to no mix user
Is just example how to convert class files to jar file and I'm do it by program name is [b]JARMaker[/b]
So will be just page of display applets and jar file that have inside class files.
JARMaker available download on  [url=http://download.cnet.com/JAR-Maker/3000-2213_4-10588876.html]JARMaker[/url]
Good luck!