How to transform DOM into String

/**
* Prints a textual representation of a DOM object into a text string..
     *
* @param document DOM object to parse.
* @return String representation of <i>document</i>.
*/
    static public String toString(Document document) {
        String result = null;
       
        if (document != null) {
            StringWriter strWtr = new StringWriter();
            StreamResult strResult = new StreamResult(strWtr);
            TransformerFactory tfac = TransformerFactory.newInstance();
            try {
                Transformer t = tfac.newTransformer();
                t.setOutputProperty(OutputKeys.ENCODING, "iso-8859-1");
                t.setOutputProperty(OutputKeys.INDENT, "yes");
                t.setOutputProperty(OutputKeys.METHOD, "xml"); //xml, html, text
                t.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
                t.transform(new DOMSource(document.getDocumentElement()), strResult);
            } catch (Exception e) {
                System.err.println("XML.toString(Document): " + e);
            }
            result = strResult.getWriter().toString();
        }
           
        return result;
    }//toString()