How to get all node names from XML in java

This code logic will help to get all the node names including child nodes from the XML file.

Parsing a below sample XML file:

<USER>
<NAME>Gopal Aggarwal</NAME>
<AGE>26</AGE>

<ADDRESS>
        <CITY> Bangalore</CITY>
        <STATE>Karnataka</STATE>
</ADDRESS>
</USER>

I am create a Set of unique node and print the output in the end.

package com.info.gopal.xml.parsing;

import java.io.File;
import java.io.IOException;

import java.util.LinkedHashSet;
import java.util.Set;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import org.xml.sax.SAXException;


public class ReadAndParse {


    public static void main(String[] args) throws ParserConfigurationException,
                                                  SAXException, IOException {
        File inputFile = new File("File Location");
        DocumentBuilderFactory dbfact = DocumentBuilderFactory.newInstance();
        DocumentBuilder dBuilder = dbfact.newDocumentBuilder();
        Document doc = dBuilder.parse(inputFile);
        doc.getDocumentElement().normalize();
        NodeList list = doc.getDocumentElement().getChildNodes();
        //Set with node names
        Set<String> nodeSet = new LinkedHashSet<String>();
        nodeSet = getAllNodeName(list,nodeSet); 
        //Printing node name
        for(String node : nodeSet){
            System.out.println(node);
        }
    }

    private static Set<String> getAllNodeName(NodeList list,Set<String> nodeSet) {
        for (int i = 0; i < list.getLength(); i++) {
            Node node = list.item(i);
            if (node.getNodeType() == node.ELEMENT_NODE && node.getNodeType() != node.COMMENT_NODE) {
                nodeSet.add(node.getNodeName());
                if(node.getChildNodes().getLength() > 1){
                    nodeSet = getAllNodeName(node.getChildNodes(),nodeSet);
                }
            }
        }
        return nodeSet;
    }
}


Output :

NAME
AGE
ADDRESS
CITY
STATE

*Comments and feedback are most welcomed, Thanks.