How can I get content of xml elements?

Question

Hello everybody,
here is my xml document and my code which parses xml. I want to print content of all elements from xml to console but result is only null. But names of all elements shows correctly. Where is problem? Thank you in advance
XMLSample.java
import java.io.File;
import java.io.IOException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
public class XMLSample {
     private void getAttribute(Document doc) {
NodeList list = doc.getElementsByTagName("*");
for (int i=0; i<list.getLength(); i++) {
// Get element
Element el = (Element)list.item(i);
System.out.println(el.getNodeName());
System.out.println(el.getNodeValue());
     private Document executeXML(String[]argv) {
          if (argv.length != 1) {
               System.err.println("Usage: java DomEcho filename");
               System.exit(1);
          DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
          Document doc = null;
          try {
               DocumentBuilder builder = factory.newDocumentBuilder();
               doc = builder.parse(new File(argv[0]));                         
          } catch (SAXException sxe) {
               // Error generated during parsing)
               Exception x = sxe;
               if (sxe.getException() != null)
                    x = sxe.getException();
               x.printStackTrace();
          } catch (ParserConfigurationException pce) {
               // Parser with specified options can't be built
               pce.printStackTrace();
          } catch (IOException ioe) {
               // I/O error
               ioe.printStackTrace();
          System.out.println("doc > " + doc);
          return doc;
     public static void main(String argv[]) {
          XMLSample dom = new XMLSample();
          Document doc = dom.executeXML(argv);
          dom.getAttribute(doc);
library.xml
<library>
<book>
<author>
Jan Zitniak
</author>
<title>
JSP Guru
</title>
</book>
<book>
<author>
Jan Zitniak
</author>
<title>
JSP Guru
</title>
</book>
</library>

Answer 1

If you have XML like:
<target>value</target>What you actually have in DOM is:
Element
   TextCall getFirstChild() on the Element and cast the result as Text. Then call getNodeValue() on the Text node.
- Saish