The
ResourceDemo applet forms an
URL to the
message.txt requested from the root of the context class path.
To test missing resources, we have added a message.txt to two different
archives (resource1.zip/resource2.zip), with different messages.
Neither of those archives is added to this applet.
Instead, we add a non-existant resource3.zip in the archive
attribute. A browser will typically show I/O Exception invalid url.