Flip a Buffered Image in Java

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import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;

public class Main {
  public static void main(String[] argv) throws Exception {
    BufferedImage bufferedImage = new BufferedImage(200, 200,
        BufferedImage.TYPE_BYTE_INDEXED);

    AffineTransform tx = AffineTransform.getScaleInstance(1, -1);
    tx.translate(0, -bufferedImage.getHeight(null));
    AffineTransformOp op = new AffineTransformOp(tx,
        AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
    bufferedImage = op.filter(bufferedImage, null);

  }
}