I therefore converted the JApplet code to a JFrame. The application launches from my web server except the icon in the JFrame and the images do not display.
The line beginning with Toolkit is where the problem is. I cannot use the same code as in the JApplet to retrieve the images because I now have a JFrame.
Java Web Start provides limited support for applets through its built-in applet viewer. However, this is not intended to be a full- scale applet environment, such as the one provided by Java Plug-in. Java Web Start's applet viewer has certain limitations; for example, you cannot specify class files as resources, and it does not accept policy files.
So, Web Start does have some support for applets, at least in the most recent versions. I don't know whether this helps your particular situation or not.