hi ok i need someones help with applets.... how do u sucessfully download an applet form the web ??

cos i know i can dl it by getting the source code and such but then i get a main class manifest error... such as getting this applet form the web to be able to use on its own..

Exercise, Single-Slit Diffraction

thx spaz

if this is not allowed then say so.. cos i was asked to find this out