Java EE (Java Enterprise Edition) General Discussion

hi
this is my xml file

<?xml version="1.0" encoding="UTF-8"?>
<invoiceClose>
<line lineNo="1">111</line>
<line lineNo="2">wwwwwwwwww</line>
<line lineNo="3">eeeeeeeeeeeeeee</line>
<line lineNo="4">3333333333</line>
</invoiceClose>

parser program is very simple below
it is giving null values and null pointer exception when i am
getting the attribute value...

import javax.xml.parsers.*;
import org.w3c.dom.*;
import java.io.*;
import java.util.*;
import java.awt.List;
public class sam implements java.io.Serializable
{
static Document d =null;
boolean flag = true;
static NodeList nodelist = null;
static Node node = null;
static Element element =null;
static Vector vectIn =null;
static Vector vectOut =null;

public sam(){
}

public static Document getDocument(String file) throws Exception {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new File(file));
return doc;
}

public static void main(String args[]) {

try{

String filename = "C:\line.xml";
d = getDocument() ;
element = d.getDocumentElement(filename );

nodelist = d.getElementsByTagName("line");

Attribute attr = element.getAttribute("lineNo");
System.out.println("element.hasAttribute(value)"+element.hasAttribute("lineNo"));
System.out.println("Attr "+attr);

Element e = d.getElementById("lineNo");

System.out.println("eeeeeeeee "+e);

}
catch(Exception ex) {
System.out.println("value of Exception is"+ex);
}


}
}


change filename fath accroding to u xml file path...

can any one help me in the regards...
it is very much helpfull for me..

with regards
elan