QRCode from an Image in Java

Demo.java

import java.io.InputStream;
import java.io.ByteArrayInputStream;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.LuminanceSource;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.QRCodeReader;
import com.google.zxing.Result;

public class Demo {
   public static void main(final String[] args) {
      final byte[] image = new byte[] {}; //get this from somewhere
      System.out.println(getDecodedQRCode(image));
   }
   
   private static String getDecodedQRCode(final byte[] array)
            throws IOException, NotFoundException, ChecksumException, FormatException {
        try(InputStream in = new ByteArrayInputStream(array)) {
            BufferedImage image = ImageIO.read(in);
            LuminanceSource source = new BufferedImageLuminanceSource(image);
            BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
            QRCodeReader reader = new QRCodeReader();
            Result result = reader.decode(bitmap);
            return result.getText();
        }
    }
}