Barcode Generator in Java

/**

    you need two libraries

    1: Barcode.jar

    2: itextpdf.jar

*/ 

public void createPdf(String filename,String referenceNo){

    Document document = new Document();
    PdfWriter documentWriter = null;
    try{
        documentWriter = PdfWriter.getInstance(document, new FileOutputStream("E:\\Barcode\\"+filename));
        document.addAuthor("fahad");
        document.addCreationDate();
        document.addProducer();
        document.addCreator("com.i2p.com");
        document.addTitle("Barcode");
        document.setPageSize(PageSize.LETTER);
        document.open();
        PdfContentByte cb = documentWriter.getDirectContent();
        Barcode128 barcode128 = new Barcode128();
        barcode128.setCode(referenceNo.trim());
        barcode128.setCodeType(Barcode128.CODE128);
        Image code128Image = barcode128.createImageWithBarcode(cb, null,null);
        code128Image.setAbsolutePosition(10,700);
        code128Image.scalePercent(125);
        document.add(code128Image);


    }
    catch(Exception e){
        e.printStackTrace();
    }finally {
        if (document!=null){
            document.close();
        }
        if(documentWriter!=null){
            documentWriter.close();
        }
    }
}