public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException {
		
		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
		
		DocumentBuilder db = dbf.newDocumentBuilder();
		
		Document doc = db.parse(new File("students.xml"));
		
		Element root = doc.getDocumentElement();
		
	    recursionElement(root);	
		
	}