In addition to our needs for headless support, we'd also like to have
a JDK Permission to control the ability to show a window on the screen
(as opposed to showing a window on a printer). For some components of
the Java 2 Platform, Enterprise Edition, it is inappropriate for them to
even attempt to display a window. The much requested headless support
would cause such a display attempt to be displayed "in memory", but what
we really want is the ability to block such an attempt entirely.