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javazxingtype-mismatch

Type mismatch: cannot convert from ByteMatrix to BitMatrix

I am creating a QR code generator program in JAVA using ZXING library. The program is

import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;

import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Path;


public class QR_Gen {
    private static final String QR_CODE_IMAGE_PATH = "./MyCode.png";

    private static void generateQRCodeImage(String text, int width, int 
height, String filePath) throws WriterException, IOException {
        QRCodeWriter qrCodeWriter = new QRCodeWriter();
        BitMatrix bitMatrix = qrCodeWriter.encode(text, 
BarcodeFormat.QR_CODE, width, height);
        Path path = FileSystems.getDefault().getPath(filePath);
        MatrixToImageWriter.writeToPath(bitMatrix, "PNG", path);

    }
    public static void main(String[] args) {
        try {
            generateQRCodeImage("This is my first QR Code", 350, 350, QR_CODE_IMAGE_PATH);
            System.out.println("QR Code generated successfully");
        } catch (WriterException e) {

            System.out.println("Could not generate QR Code, WriterException :: " + e.getMessage());
        } catch (IOException e) {
            System.out.println("Could not generate QR Code, IOException :: " + e.getMessage());
        }
    }

}

While compiling this program i'm getting a Type Mismatch Error,

Type mismatch: cannot convert from ByteMatrix to BitMatrix

in this line

BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height);

Please help!!!

Solution

  • Never used this library myself, but reading the errormessage I would assume that you have to problem that you want to store byte in bits. The problem will be that a byte is build up by multiple bits so you cannot represent a byte via only one bit.

    Store your encode data into an ByteMatrix and then read this post:

    to finish things off.