Opening tiff image file and finding pixel values at each point

Question

I want to open a tiff image file using java.Than i want to find out the pixel values at each point.Also if possible red,green and blue values.
please mail me answer or code if possible on mail id:
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Answer 1

Use Java Advanced Imaging to open the Tiff. There is
a tutorial on it. Look to the left for tutorials, look
for JAI, do what it says.
For getting the pixels, do this:
Use a PixelGrabber to get pixels in array:
int[] pixels = new int[w * h];
PixelGrabber pg = new PixelGrabber(img, x, y, w, h, pixels, 0, w);
pg.grabPixels();
Use a MouseMotionListner for
mouseMoved(MouseEvent moueEvent)
pixel = pixels[mouseEvent.getX() + (mouseEvent.getY()*width)]
int alpha = (pixel >> 24) & 0xff;
int red = (pixel >> 16) & 0xff;
int green = (pixel >> 8) & 0xff;
int blue = (pixel ) & 0xff;
Look up the API for MouseMotionListener, PixelGrabber, etc...