Developer
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JNLP Class.forName and get Resource Resstrictions:
Java Web Start uses a user-level classloader to load all the application resources specified in the JNLP file. This classloader implements the security model and the downloading model defined by the JNLP specification. This is no different than how the AppletViewer or the Java Plug-In works.

This has the, unfortunate, side-effect that Class.forName will not find any resources that are defined in the JNLP file. The same is true for looking up resources and classes using the system class loader (ClassLoader.getSystemClassLoader).

To find application resources in Java Web Start, use the classloader that loaded your application, for example use the following call in the in the application;s main thread:

this.getClass().getClassLoader();

You can also use:

Thread.getCurrent().getContextClassLoader();
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