total number of nodes in xml

Question

I need to get the total number of nodes in an xml file for Elements we use
NodeList nodeList = doc.getElementsByTagName("*"); but for nodes if you have any idea Thank you

Answer 1

The code below might work. The idea is to count each element of an XML file (and also its child elements), using recursion.

public class Main {

    int totalNodes = 0;

    public Main() throws Exception {
        String file = getClass().getResource("/test.xml").getFile();
        File fXmlFile = new File(file);
        DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
        Document doc = dBuilder.parse(fXmlFile);
        countNodes(doc.getDocumentElement());
        System.out.println(totalNodes);
    }

    public void countNodes(Node node) {
        System.out.println(node.getNodeName());
        totalNodes++;
        NodeList nodeList = node.getChildNodes();
        for (int i = 0; i < nodeList.getLength(); i++) {
            Node currentNode = nodeList.item(i);
            if (currentNode.getNodeType() == Node.ELEMENT_NODE) {                    
                countNodes(currentNode);
            }
        }
    }

    public static void main(String[] args) throws Exception {
        new Main();
    }
}