Parsing / Reading XML file in Java

ParseXML.java

package net.viralpatel.java.xmlparser;

import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

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

public class XMLParser {

	public void getAllUserNames(String fileName) {
		try {
			DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
			DocumentBuilder db = dbf.newDocumentBuilder();
			File file = new File(fileName);
			if (file.exists()) {
				Document doc = db.parse(file);
				Element docEle = doc.getDocumentElement();

				// Print root element of the document
				System.out.println("Root element of the document: "
						+ docEle.getNodeName());

				NodeList studentList = docEle.getElementsByTagName("student");

				// Print total student elements in document
				System.out
						.println("Total students: " + studentList.getLength());

				if (studentList != null && studentList.getLength() > 0) {
					for (int i = 0; i < studentList.getLength(); i++) {

						Node node = studentList.item(i);

						if (node.getNodeType() == Node.ELEMENT_NODE) {

							System.out
									.println("=====================");

							Element e = (Element) node;
							NodeList nodeList = e.getElementsByTagName("name");
							System.out.println("Name: "
									+ nodeList.item(0).getChildNodes().item(0)
											.getNodeValue());

							nodeList = e.getElementsByTagName("grade");
							System.out.println("Grade: "
									+ nodeList.item(0).getChildNodes().item(0)
											.getNodeValue());

							nodeList = e.getElementsByTagName("age");
							System.out.println("Age: "
									+ nodeList.item(0).getChildNodes().item(0)
											.getNodeValue());
						}
					}
				} else {
					System.exit(1);
				}
			}
		} catch (Exception e) {
			System.out.println(e);
		}
	}
	public static void main(String[] args) {

		XMLParser parser = new XMLParser();
		parser.getAllUserNames("c:\\test.xml");
	}
}

students.xml

<?xml version="1.0"?>
<students>
	<student>
		<name>John</name>
		<grade>B</grade>
		<age>12</age>
	</student>
	<student>
		<name>Mary</name>
		<grade>A</grade>
		<age>11</age>
	</student>
	<student>
		<name>Simon</name>
		<grade>A</grade>
		<age>18</age>
	</student>
</students>