scaledImageCaches[zoomIndex].put(base, scaled);
tracker.removeImage(scaled);  scaledImageCache.put(base, scaled);
    private Image getScaledImage(Image base) {        if (base == null) {            return null;        }        if (zoomIndex == BASE_ZOOM_INDEX) {            return base;        }        Image scaled = (Image) scaledImageCaches[zoomIndex].get(base);        if (scaled == null) {            Dimension d = getImageBounds(base).getSize();            d.width *= scale;            d.height *= scale;            scaled = scale(base, d.width, d.height);            MediaTracker tracker = new MediaTracker(this);            tracker.addImage(scaled, 1);            // Wait for image to load            try {                tracker.waitForID(1);            } catch (InterruptedException e) {                e.printStackTrace();            }            scaledImageCaches[zoomIndex].put(base, scaled);        }        return scaled;    }