<class>
   <student rollno = "393">
      <firstname>dinkar</firstname>
      <lastname>kad</lastname>
      <nickname>dinkar</nickname>
      <marks>85</marks>
   </student>
</class>

File inputFile = new File("input.xml");
         SAXReader reader = new SAXReader();
         Document document = reader.read( inputFile );

         System.out.println("Root element :" + document.getRootElement().getName());

         Element classElement = document.getRootElement();

         List<Node> nodes = document.selectNodes("/class/student" );
         System.out.println("----------------------------");

         for (Node node : nodes) {
            System.out.println("nCurrent Element :"
               + node.getName());
            System.out.println("Student roll no : "
               + node.valueOf("@rollno") );
            System.out.println("First Name : "
               + node.selectSingleNode("firstname").getText());

List<Node> nodes = document.selectNodes("/class/student" );

Root element :class
Exception in thread "main" java.lang.NoClassDefFoundError: org/jaxen/NamespaceContext
    at org.dom4j.DocumentFactory.createXPath(DocumentFactory.java:230)
    at org.dom4j.tree.AbstractNode.createXPath(AbstractNode.java:207)
    at org.dom4j.tree.AbstractNode.selectNodes(AbstractNode.java:164)
    at domParsing.EgParser.main(EgParser.java:25)
Caused by: java.lang.ClassNotFoundException: org.jaxen.NamespaceContext
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

List<Node> nodes = document.selectNodes("/class/student" );