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cropping image in a servlet  RSS feed

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I have a problem with image cropping, i use jcrop and a java servlet.
in my servlet the image is cropped correctly but the top
left x and y coordinate of the result rectangle is always equal to the 0,0
coordinate of the source rectangle, example:

with this code:

doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
int x = new Integer( request.getParameter("x"));//
int y = new Integer( request.getParameter("y"));
BufferedImage File("..........");
BufferedImage cropped=outImage.getSubimage(x, y, w, h);
ImageIO.write(cropped,ext, new File("...."));

I get always as result an image tath is cropped from x and y equal to 0 0.
i have checked x and y and they are not equal to 0.

Can you help me?
thank you
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