parsing xml di java pakai dom

import org.w3c.dom.*;
import javax.xml.parsers.*;
import java.io.*;

public class NodeExplorer{
public static void main(String[] args) {
try{
BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
//System.out.print("Enter xml file name: ");
String str = "test.xml";
File file = new File(str);
if (file.exists()){
DocumentBuilderFactory fact = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = fact.newDocumentBuilder();
Document doc = builder.parse(str);
Node node = doc.getDocumentElement();
String root = node.getNodeName();
System.out.println("Root Node: " + root);

nodeExplorer(node);

}
else{
System.out.println("File not found!");
}
}
catch(Exception e){}
}


public static void nodeExplorer(Node node)
{
NodeList nodeList = node.getChildNodes();

int length = nodeList.getLength();

if(length>0)
{
for(int i=0;i<length;i++)
{
Node curr = nodeList.item(i);
System.out.println(curr.getNodeName());
nodeExplorer(curr);
}
}
else
{
System.out.println("mentok");
}
}
}