XML parsing a spesific value with DOM

Question

Hi guys.
I have the following xml file:
<channel>
      <title>Java Technology Headlines</title>
      <link></link>
      <description>Technical content and news from java.sun.com, the premier source of information about the Java platform.</description>
      <language>en-us</language>
      <image>
        <title>java.sun.com</title>
        <url>http://developers.sun.com/im/logo_java_grey.gif</url>
        <link></link>
        <width>144</width>
        <hight>40</hight>
        <description>Visit java.sun.com</description>
      </image>   
     <item>
        <title>Implementing Service-Oriented Architectures (SOA) with the Java EE 5 SDK</title>
        <link>http://java.sun.com/developer/technicalArticles/WebServices/soa3/?feed=JSC</link>
        <description>This article presents concepts and language constructs needed to develop a Service-Oriented Architecture composite application in Java EE 5. It then describes an example application designed to solve a business problem.</description>
        <date></date>
     </item>
     <item>
        <title>2006 JavaOne Highlights!</title>
        <link>http://java.sun.com/javaone/sf/?feed=JSC</link>
        <description>In It's a Wrap, read about the doings that kept 14,000 attendees percolating. Winner's Circle lists who won the various drawings. And Incoming T-Shirt! Duck! celebrates the Gosling-MythBusters' Wow factor.</description>
        <date></date>
     </item>
     <item>
        <title>Visit us at JavaOne!</title>
        <link>http://java.sun.com/javaone/sf/?feed=JSC</link>
        <description>We are at the 2006 JavaOne conference this week. Find out about the latest happenings, including session coverage, announcements, articles, blogs, photos, and more. Check out all the JavaOne action at java.sun.com/javaone/sf.</description>
        <date></date>
     </item>
</channel>    and the following java class.
public class SimpleDOMExample
  public SimpleDOMExample()
  private static void scanDOMTree(Node node)
    int type = node.getNodeType();
    switch (type)
      case Node.ELEMENT_NODE:
         //System.out.println("Element: " +node.getNodeName());
         if(node.getNodeName().equals("channel")&&node.getNodeName().equals("title"))
              //&& node.getNodeName().equals("title"))
             Node fc = node.getFirstChild();
              //Node sc = fc.getNextSibling();
            System.out.println("the tithe: "+ fc.getNodeValue());}
               if(node.getNodeName().equals("link")){
                // if ( node.getNodeName().equals("title") )//&& node.getNodeName().equals("title")
                  Node fc = node.getFirstChild();
                   //Node sc = fc.getNextSibling();
                 System.out.println("the url: "+ fc.getNodeValue());}
        NamedNodeMap attrs = node.getAttributes();
        for (int i = 0; i < attrs.getLength(); i++)
          Node attr = attrs.item(i);
          //System.out.println("Attribute: " +attr.getNodeName() + "=\"" + attr.getNodeValue());
        NodeList children = node.getChildNodes();
        if (children != null)  
          int len = children.getLength();
          for (int i = 0; i < len; i++)
            scanDOMTree(children.item(i));
        break;
      case Node.DOCUMENT_NODE:
        scanDOMTree(((Document)node).getDocumentElement()); 
        break;
      case Node.ENTITY_REFERENCE_NODE:
        //System.out.print("this &"+node.getNodeName()+";");
        break;
      case Node.TEXT_NODE:
       // System.out.println("TEXT: " + node.getNodeValue().trim());
        break;
     public static void main(String argv[])
          DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
          Document document = null;
    try
               DocumentBuilder builder = factory.newDocumentBuilder();
               document = builder.parse( new File("java.xml"));
    catch (Exception e)
               e.printStackTrace();
    if(document!=null)
               scanDOMTree(document);
}The questions i have are really simple.
1) I am trying to get a specific value from the xml.
for example the <title> after <channel> but i want only this title not the others as well. I can all the titles but i cant get it right for returning only the first. What am i doing wrong?
2) i also want to parse the same values that are in the <item> for all 3 items but when i am using the
               if(node.getNodeName().equals("link")){
                 Node fc = node.getFirstChild();
                 System.out.println("the link: "+ fc.getNodeValue());}i get a nullPointerException because the first link is empty under the <title>. If i change it to <description> it works fine.
The fact is that i dont know how to point it to look a specific tags like only in <item>
I have some comments in there of the different things i tried...
Any suggestions??? Pleaseeeee.... :)
Thx in advance...

Answer 1

thx for the replay
1) i thought of using xpath but wanted to know how to do it over DOM
2) i mean that the 3 <item> have other element inside like that:
<item>
<title>Implementing Service-Oriented Architectures (SOA) with the Java EE 5 SDK</title>
  <link>http://java.sun.com/developer/technicalArticles/WebServices/soa3/?feed=JSC</link>
  <description>This article presents concepts and language constructs needed to develop a Service-Oriented Architecture composite application in Java EE 5. It then describes an example application designed to solve a business problem.</description>
  <date />
  </item>and all of them have <title>, <link> etc. I want to get the same values(eg. <title>) from all the 3 <item> and not including the <title> in the begining of xml
3) i am a professional child.....joke....
try to get to your sensitive side...thats way.