How do I create a QR code for Zxing in Java 1.5?

public String make_QR_code_file(String strPara_QR_code, intiPara_size)
    {
        try{
            String contents = strPara_QR_code;// QR-coded string
            BarcodeFormat format = BarcodeFormat.QR_CODE; // Specify QR code format

            int width = iPara_size; // Horizontal size of QR code
            intheight=iPara_size; // QR code vertical size

            // Generic cannot be used because different types of values are included.
            Hashtable<EncodeHintType, ErrorCorrectionLevel>hints=new Hashtable<EncodeHintType, ErrorCorrectionLevel>();;

            // Designated shift JIS to handle Japanese
//          hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

            // Specify error recovery level
            // ErrorCorrectionLevel.L: 7% correction level
            // ErrorCorrectionLevel.M: 15% correction level
            // ErrorCorrectionLevel.Q: 25% correction level
            // ErrorCorrectionLevel.H: 30% correction level
            hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M)<

            // Class that encodes QR codes
            QRCodeWriter writer=newQRCodeWriter();

            BitMatrix bitMatrix = writer.encode (contents, format, width, height, hits);
            BufferedImage image=MatrixToImageWriter.toBufferedImage(bitMatrix);
            ImageIO.write(image, "png", new File("/usr/local/apache-tomcat-5.5.33/webapps/ROOT/api/file/qr_code_0001/barcode.png"));

// temporary return value
            return '';
        }
        catch(IOExceptione){
            e.printStackTrace();
        }
        catch(WriterExceptione){
            e.printStackTrace();
        }

        return null;
    }