How to set a new value for an element inside an XML file....

Hi guys...!
I'm using Java to process an XML file and I want to able to make changes to the document. For instance, let say:
<firstName> John </firstName>
and I want to change the content or value of the element "firstName" to "Marc"
<firstName>Marc</firstName>
How can I get this done?
This is the code that I have in my java file...But it doesn't work. Nothing happens. The firstName remains "John".
Do I need to get the owner document to do this?
firstPersonElement.getElementsByTagName("firstName").item(0).getFirstChild().setNodeValue("Marc");
Any suggestions will be appreciated...
Thanks...
--- Spirit_Away...

IMHO, it should work the way you describe. Do you
actually save the DOM tree to file afterwards?Good point. No, actually.
How do you save the document in that case ???
Any suggestions...
Thanks...
--- Spirit_Away

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Total logical records read:             4
Total logical records rejected:         0
Total logical records discarded:        0
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