Convert RenderedImage to BufferedImage in java

	public static BufferedImage convertRenderedImage(RenderedImage img) {
	if (img instanceof BufferedImage) {
	return (BufferedImage) img;
	}
	ColorModel cm = img.getColorModel();
	int width = img.getWidth();
	int height = img.getHeight();
	WritableRaster raster = cm
	.createCompatibleWritableRaster(width, height);
	boolean isAlphaPremultiplied = cm.isAlphaPremultiplied();
	Hashtable properties = new Hashtable();
	String[] keys = img.getPropertyNames();
	if (keys != null) {
	for (int i = 0; i < keys.length; i++) {
	properties.put(keys[i], img.getProperty(keys[i]));
	}
	}
	BufferedImage result = new BufferedImage(cm, raster,
	isAlphaPremultiplied, properties);
	img.copyData(raster);
	return result;
	}

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