圖像到十六進制三元組（任何語言）

    Path path = Paths.get("... .png");

    System.out.println("Image: " + path);
    try {
        BufferedImage image = ImageIO.read(path.toFile());

        int w = image.getWidth();
        int h = image.getHeight();
        for (int x = 0; x < w; ++x) {
            for (int y = 0; y < h; ++y) {
                int rgb = image.getRGB(x, y);
                System.out.printf("%06X%n", rgb & 0xFF_FF_FF);
            }
            System.out.println();
        }
        System.out.println("Done");

getRGB以ARGB格式提供顏色。