The attributes are equivalent to those provided in the HTML
applet tag. The params attribute is a
comma-separated list of name=value pairs, which will be passed
to the applet within the applet tag as param
elements.
WARNING: Closing the appletviewer window from the window manager
close button will result applet-spawned event dispatch threads being left
running. To avoid this situation, always use the appletviewer Quit
menu item or use the
Appletviewer.terminate() method of this class.