try {
    List<BufferedImage> images = pdf.extractAllImages();
    System.out.println("Number of images extracted from the website: " + images.size());

    int i = 0;
    for (BufferedImage image : images) {
        ImageIO.write(image, "PNG", Files.newOutputStream(Path.of("assets/extracted_" + ++i + ".png")));
    }
} catch(Exception exception) {
    System.out.println("Failed to extract images from the website");
    exception.printStackTrace();
}