Traverse the children of an given element

Question

Give the element, I want to traverse the children of the element
<?xml version = "1.0"?>
<persons>
<person>
     <name>Joe</name>
     <age>22</age>
     <dept>HR</dept>
</person>
</persons>
Caller: traverseElementChildren("person");
Here's my attempt, but it yield null pointer exception on node.getNodeValue();
public static void traverseElementChildren(String nodeName)
     NodeList rootNode = doc.getElementsByTagName(nodeName);
     Element elem = (Element)rootNode.item(0);
     NodeList n = elem.getChildNodes();
     for (int i=0; i<n.getLength(); i++)
     {     Node node = rootNode.item(i);
          //Exception in thread "main" java.lang.NullPointerException
          System.out.println(node.getNodeValue());
}

Answer 1

OK, now I do the following but surprising return
null
null
nullMaybe you should rebuild your JAVA file(s).
And also verify that the parsed xml file is the one you have posted.
With the following xml file:
<?xml version = "1.0"?>
<persons>
<person>
<name>Joe</name>
<age>22</age>
<dept>HR</dept>
</person>
</persons>
The following statement:
        traverseElementChildren("person");With the following method:
    public static void traverseElementChildren(String nodeName)
        NodeList rootNode = doc.getElementsByTagName(nodeName);
        Element elem = (Element)rootNode.item(0);
        NodeList n = elem.getChildNodes();
        for (int i = 0; i < n.getLength(); i++)
            Node node = n.item(i);
            System.out.println(node.getNodeName());
    }Gives the following output at the console:
#text
name
#text
age
#text
dept
#text
So it IS working perfectly well. No starnge behaviour at all.
Next time please paste your code between code tags exactly like this:
&#91;code&#93;
your code
&#91;/code&#93;
Thank you