*Run the test attached, when the primary monitor use 256 color (which happen to return 2 graphicsConfigurations from the testing machine )and the second monitor use 24 bit color, the following exceptions were thrown:
java.lang.ArrayIndexOutOfBoundsException
        at java.awt.image.ComponentColorModel.getDataElements(ComponentColorMode
l.java:910)
        at sun.java2d.loops.TextRendering.toIndexed(TextRendering.java:243)
        at sun.java2d.loops.drawStringIndexed.DrawString(TextRendering.java:2786
)
        at sun.java2d.loops.RasterOutputManager.drawString(RasterOutputManager.j
ava:2927)
        at sun.java2d.SunGraphics2D.drawString(SunGraphics2D.java:2245)
        at GCCanvas.paint(ScreenTest.java:150)
        at sun.awt.RepaintArea.paint(RepaintArea.java:298)
        at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:193)
        at java.awt.Component.dispatchEventImpl(Component.java:2665)
        at java.awt.Component.dispatchEvent(Component.java:2499)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:319)
        at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:10
3)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)

        at java.awt.EventDispatchThread.pumpOneEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)

* when the primary monitor use 16 bit color or higher ( 6 gc in the testing machine ) and the scond or the third monitor use 256 color( 2 gc ), the following hotspot error are thrown, application terminate.
#
# HotSpot Virtual Machine Error, EXCEPTION_ACCESS_VIOLATION
#
# Error ID: 4F533F57494E13120E43505002BE
#

* On win98, it is a pass. When using 256 color on the primary or the scecond monitor, since there is a bug that make win98 just return one gc, there is no exception or crash.