A strange one - setPixels only works against the left of the screen

Question

setPixels(int x, int y, int w, int h, ColorModel model, int[] pixels, int off, int scansize)My applet's split into different bits. The main game screen (which I'm animating to with pixel[]) starts in the top left hand corner...
_consumer.setPixels(0,0,ScreenWidth,ScreenHeight,_model,(int[])pixel,0,ScreenWidth);ScreenWidth and ScreenHeight are the dimensions of the main game screen. There's a stats area to the right, but that's just done with Graphics.drawString, etc..
Anyway, I want the statbox to go on the left, so I need the main screen to get drawn on the right. No problem, right?
_consumer.setPixels(StatboxWidth,0,ScreenWidth,ScreenHeight,_model,(int[])pixel,0,ScreenWidth);
java.lang.ArrayIndexOutOfBoundsException
        at java.lang.System.arraycopy(Native Method)
        at sun.awt.image.IntegerInterleavedRaster.setDataElements(IntegerInterleavedRaster.java:359)
        at sun.awt.image.ImageRepresentation.setPixels(ImageRepresentation.java:484)
        at Strib.update_consumer(Strib.java:197)
        at Strib.paint(Strib.java:99)
        at Strib.run(Strib.java:187)
        at java.lang.Thread.run(Thread.java:484)The only way i can increase x at all is by decreasing w by the same amount, giving me a smaller main screen. I've tried changing the offset up or down just in case but that doesn't help. What am I missing?
Thanks for your help!

Answer 1

you only call consumer.setPixels() once at the end of the frame.
all the drawing goes into your pixel[].
the width in setPixels() is being added to the x. since the width is the max value its overflowing.
public void run()
   while (running)
      render();
      update(pixels);
      try
         thread.sleep(threadDelay);
      } catch (InterruptedException e)
public void render()
   java.util.Arrays.fill(pixels, 0x000000); // fill the screen wiht black 
   writePixel(100,100,0xFF0000); // put a red pixle at 100-100
public synchronized void update(int[] pixels)
   if (consumer != null)
   // copy integer pixel data to image consumer
   consumer.setPixels(0, 0, width, height, model, pixels, 0, width);
   // notify image consumer that the frame is done
   consumer.imageComplete(ImageConsumer.SINGLEFRAMEDONE);
   paint();
private synchronized void paint()
   // draw the back buffer image onto the screen
   getGraphics().drawImage(image, 0, 0, width, height, null);
public final void writePixel(int x, int y, int color)
   int i = width * y + x;
   if (i >= 0 && i < size)// size = screen width * height
      pixels[i] = color;
}