NodeList fList = firstWordElement
                        .getElementsByTagName("root");
                for (int i = 0; i < fList.getLength(); i++) {
                    Node firstFLNode = fList.item(i);
                    if (firstFLNode.getNodeType() == Node.ELEMENT_NODE) {
                        Element firstWdElement = (Element) firstFLNode;
                        NodeList firstWdList = firstWdElement.getElementsByTagName("innerclass");

                        for (int j = 0; j < firstWdList.getLength(); j++) {

                            Element firstWd1Element = (Element) firstWdList.item(j);

                            if (firstWd1Element.getNodeType() == Node.ELEMENT_NODE) {
                                String InnerName = ParseUtil.getTagValue("name", firstWd1Element);
                                String InnerFormat = ParseUtil.getTagValue("format", firstWd1Element);
                                String InnerDescription = ParseUtil.getTagValue("description", firstWd1Element);

                                NodeList innerClassList = firstWd1Element.getElementsByTagName("subclass");

                                for (int k = 0; k < innerClassList.getLength(); k++) {

                                    Element subClassElement = (Element) innerClassList
                                            .item(k);
                                    if (subClassElement.getNodeType() == Node.ELEMENT_NODE) {
                                        String InnerSubName = ParseUtil.getTagValue("name", subClassElement);
                                        System.out.println("Innername==="+ InnerSubName);
                                        String InnerSubFormat = ParseUtil.getTagValue("format", subClassElement);
                                        System.out.println("Innerformat==="+ InnerSubFormat);
                                        String InnerSubDescription = ParseUtil.getTagValue("description", subClassElement);
                                        System.out.println("Innerdescription==="+ InnerSubDescription);

                                    }
                                }

                            }



                        }
                    }
                }

NodeList fList = firstWordElement
                        .getElementsByTagName("root");
                for (int i = 0; i < fList.getLength(); i++) {
                    Node firstFLNode = fList.item(i);
                    if (firstFLNode.getNodeType() == Node.ELEMENT_NODE) {
                        Element firstWdElement = (Element) firstFLNode;
                        NodeList firstWdList = firstWdElement.getElementsByTagName("innerclass");

                        for (int j = 0; j < firstWdList.getLength(); j++) {

                            Element firstWd1Element = (Element) firstWdList.item(j);

                            if (firstWd1Element.getNodeType() == Node.ELEMENT_NODE) {
                                String InnerName = ParseUtil.getTagValue("name", firstWd1Element);
                                String InnerFormat = ParseUtil.getTagValue("format", firstWd1Element);
                                String InnerDescription = ParseUtil.getTagValue("description", firstWd1Element);

                                NodeList innerClassList = firstWd1Element.getElementsByTagName("subclass");

                                for (int k = 0; k < innerClassList.getLength(); k++) {

                                    Element subClassElement = (Element) innerClassList
                                            .item(k);
                                    if (subClassElement.getNodeType() == Node.ELEMENT_NODE) {
                                        String InnerSubName = ParseUtil.getTagValue("name", subClassElement);
                                        System.out.println("Innername==="+ InnerSubName);
                                        String InnerSubFormat = ParseUtil.getTagValue("format", subClassElement);
                                        System.out.println("Innerformat==="+ InnerSubFormat);
                                        String InnerSubDescription = ParseUtil.getTagValue("description", subClassElement);
                                        System.out.println("Innerdescription==="+ InnerSubDescription);

                                    }
                                }

                            }



                        }
                    }
                }

XPathFactory factory = XPathFactory.newInstance();

XPath xpath = factory.newXPath();

XPathExpression expr = xpath.compile("//book[author='Neal Stephenson']/title/text()");

Object result = expr.evaluate(doc, XPathConstants.NODESET);

NodeList nodes = (NodeList) result;
for (int i = 0; i < nodes.getLength(); i++) {
    System.out.println(nodes.item(i).getNodeValue());
}