Can I copy an image to avoid re-requesting from url?

Hi,

I have written a GWT client that among other things requests images
that are generated server-side. To conserve bandwith and server CPU, I
would like to cache the images in an url -> image map. To do that
properly, I would need to be able to copy an image as in final Image
myImage = new Image(cache.get(url));

Is this possible?

Regards,
Anders S. Johanse, ange.dk

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