code: public synchronized AcceleratedScreen getAcceleratedScreen(int[] attributes)
              throws GLException, UnsatisfiedLinkError {
          if (accScreen == null) {
              accScreen = new AcceleratedScreen(attributes);
          }
          return accScreen;
      }
docs: Gets the AcceleratedScreen for this platform
  
  @param attributes a sequence of pairs (GLAttibute, value)
  @return an AcceleratedScreen for rendering using OpenGL
  @throws GLException if no OpenGL surface could be created
  @throws UnsatisfiedLinkError if native graphics libraries could not be loaded for this platform.