There is no documentation about behaviour of
public VolatileImage createVolatileImage(int width,
                                         int height,
                                         ImageCapabilities caps)
                                  throws AWTException
as in createVolatileImage(int, int)
It seems that these stroke must present in both method description:
"The return value may be null if the component is not displayable. This will always happen if GraphicsEnvironment.isHeadless() returns true."

Note: 4427495
###@###.### 10/29/04 09:10 GMT