userExists

public boolean userExists(String username){
        //System.out.println("achi1hth");

        try{
            File fXmlFile = new File(filePath);
            DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
            System.out.println("hfjhf");
            Document doc = dBuilder.parse(fXmlFile);
            System.out.println("fdg");
            doc.getDocumentElement().normalize();
            //System.out.println("achi");
            NodeList nList = doc.getElementsByTagName("user");

            for (int temp = 0; temp < nList.getLength(); temp++) {
                Node nNode = nList.item(temp);
                if (nNode.getNodeType() == Node.ELEMENT_NODE) {
                    Element eElement = (Element) nNode;
                    if(getTagValue("username", eElement).equals(username)){
                        return true;
                    }
                }
            }
            return false;
        }
        catch(Exception ex){
            System.out.println("Database exception : userExists()");
            return false;
        }
    }