How to modify a node value in a DOM tree?

Question

I have following code; it parses a XML file from a file and builds a in-memory DOM tree, but when I tries to modify one of the node value, it keeps telling me: oracle.xml.parser.v2.XMLDOMException: Node cannot be modified. How do I do it?
// ==================================
DOMParser theParser = new DOMParser();
theParser.setValidationMode(false);
InputStream theInputStream = myApp.class.getResourceAsStream("/test.xml");
theParser.parse(theInputStream);
XMLDocument theXMLDoc = theParser.getDocument();
NodeList theNodeList = theXMLDoc.selectNodes("/root/child");
for (int i = 0; i < theNodeList.getLength(); i++)
theNodeList.item(i).setNodeValue("test");
null

Answer 1

You're trying to set the node value of an element, which cannot have a node value.
You need to set the node value of the text-node child of the element instead.
Or remove the current text-node child and append a new text-node child with the new value.