how to scan qr code and store them java code example

Example: qr code generator in java

public static BufferedImage generateQRCodeImage(String barcodeText) throws Exception {
    QRCodeWriter barcodeWriter = new QRCodeWriter();
    BitMatrix bitMatrix = 
      barcodeWriter.encode(barcodeText, BarcodeFormat.QR_CODE, 200, 200);

    return MatrixToImageWriter.toBufferedImage(bitMatrix);
}