how to add text below QR code using com.google.zxing libraby in JAVA

Question

I have generated QR code using com.google.zxing this library. QRCode generations work fine but I want to display Data of QRcode below QRcode.

I want to generate QR code like attached below.

Here is my code.

QRCodeWriter qrCodeWriter = new QRCodeWriter();
        BitMatrix bitMatrix = qrCodeWriter.encode(data, BarcodeFormat.QR_CODE, width, height);
        ByteArrayOutputStream pngOutputStream = new ByteArrayOutputStream();
        MatrixToImageWriter.writeToStream(bitMatrix, "PNG", pngOutputStream);
        byte[] pngData = pngOutputStream.toByteArray();

Answer 1

Here I Generated QR Code file and took in memory and then used Graphics Lib. Using this Library could add Text to that Memory and saved it again.

public static void main(String[] args) {        
   try {
        QRCodeWriter qrCodeWriter = new QRCodeWriter();
        BitMatrix bitMatrix = qrCodeWriter.encode("Hello world", BarcodeFormat.QR_CODE, 300, 300);
        Path path = FileSystems.getDefault().getPath("test.png");
        MatrixToImageWriter.writeToPath(bitMatrix, "PNG", path);     
        
        
                  
       final BufferedImage image = ImageIO.read(new File(path.toString()));
       JFrame frame = new JFrame();
       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       Graphics g = image.getGraphics();
       g.setFont(g.getFont().deriveFont(22f));
       Color textColor = Color.BLACK;
       g.setColor(textColor);
       g.drawString("Hello world", 15, 300);
       g.dispose();

       ImageIO.write(image, "png", new File("test45.png"));
        
                   
    } catch (WriterException | IOException ex) {
        
    }  
}