XML DOM in Java

Of late, I have been working with Java. And one of the issues that I faced was XML parsing. With so many libraries available, I decided to stick to jaxp. What follows is sample code to Tree walk over the nodes:

TreeWalk.java
 1 import java.io.File;
 2 
 3 import javax.xml.parsers.DocumentBuilder;
 4 import javax.xml.parsers.DocumentBuilderFactory;
 5 
 6 import org.w3c.dom.Node;
 7 import org.w3c.dom.NodeList;
 8 
 9 
10 public class Tester {
11     public static void main(String args[]) 
12     {
13         DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
14         factory.setNamespaceAware(false);
15 
16         try {
17             DocumentBuilder builder = factory.newDocumentBuilder();
18             org.w3c.dom.Document doc = builder.parse(new File(args[0]));
19             NodeList nodes1 = doc.getChildNodes();
20             for(int i=0; i<nodes1.getLength(); i++) {
21                 TreeWalk(nodes1.item(i), 0);
22             }
23         }
24         catch(Exception e) {
25             e.printStackTrace();
26         }
27     }
28     
29     private static void TreeWalk(Node n, int level) 
30     {
31         if(n.getNodeType() != Node.TEXT_NODE) {
32             for(int i=0; i<level; i++)
33                 System.out.print("  ");
34             System.out.print(n.getNodeName() + ":");
35         }
36         else {
37             System.out.println(n.getNodeValue().trim());
38         }
39         NodeList list = n.getChildNodes();
40         for(int i=0; i<list.getLength(); i++) {
41             TreeWalk(list.item(i), level+1);
42         }
43     }
44 }