Try using appletviewer or a web browser to run your applet rather than java. The java executable is meant for running applications (rather than applets) and they have to have a main() method which your applet lacks.
Well, the error says that it can't find a main method in that class. Can you find one? I can't. That is an Applet, you load it in a browser (from an html page in which it is referenced) or run it with appletviewer.