If you try to create a new Applet, and there's no available window environment,
the initializer will fail with an InternalError. (unset DISPLAY, xhost -, create
applet object under Solaris.)

This is a side-effect of Component really, but I want a sandbox that I can run
in the JavaTest framework without needing a GUI. If not Applet, then what?

java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the
value of the DISPLAY variable.
        at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
        at
        at java.lang.Class.forName(Native Method)
        at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvi
ronment.java:58)
        at
        at java.lang.Class.forName(Native Method)
        at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:468)
        at java.awt.Cursor.<init>(Cursor.java:284)
        at java.awt.Cursor.getPredefinedCursor(Cursor.java:199)
        at java.awt.Component.<init>(Component.java:128)
        at java.awt.Container.<init>(Container.java:88)
        at java.awt.Panel.<init>(Panel.java:59)
        at java.awt.Panel.<init>(Panel.java:51)
        at java.applet.Applet.<init>(Applet.java:39)
        at AppletServer.<init>(AppletServer.java:33)
        at AppletServer.main(AppletServer.java:131)