How to Scan QR Code in Java

// Recognize QR Code and other barcode symbols from local image file path.
public static BarcodeResult[] Scan(String filename);
// Scan and read QR Code and other barcode symbols from BufferedImage object in memory.
public static BarcodeResult[] Scan(BufferedImage image);
// Decode and read QR Code and other barcode symbols from InputStream object.
public static BarcodeResult[] Scan(InputStream imageStream);
// Define to read and detect QR Code symbol only from local image file path.
public static BarcodeResult[] Scan(String filename, BarCodeType barType);
// Define to scan and decode QR Code symbol only from BufferedImage object.
public static BarcodeResult[] Scan(BufferedImage image, BarCodeType barType);
// Define to read and recognize QR Code symbol only from InputStream object.
public static BarcodeResult[] Scan(InputStream imageStream, BarCodeType barType);

import com.pqscan.barcodereader.BarcodeResult;
import com.pqscan.barcodereader.BarcodeScanner;
import com.pqscan.barcodereader.BarCodeType;

public class ReadQRCodeDemo
{
    public static void main(String[] args)
    {
        try
        {
            // Load image source you need, and select to read QR Code only.
            BarcodeResult[] results = BarcodeScanner.Scan("C:/sample.jpg", BarCodeType.QRCode);

            for(inti = 0; i<results.length; i++)
            {
                // Show all decoded QR Code barcode symbol message
                System.out.println(results[i].getData() + "--" + results[i].getBarType());
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }
}