The .JNLP file used with this application illustrates how it’s possible for signed code to execute outside the default sandbox environment provided by Java Web Start.

Since JNLP files are simply Java Web Start files that open applications through an Internet browser, any browser that works in Windows 8.1 will open a JNLP file as long as you have Java installed.

Since the java.io file system interrogation mechanisms are out of bounds for Web Start applications, there is no way to associate a string file path with a file resource on the system and no way ...