Compilation Error when Readimg XML File.....Help me plz...

Question

Hi Dudes,
I am new to XML, when I am trying to read (parsing) the xml file from url, I am getting the following error.(using JAXP)
xml2jsp.java:50: createTextNode(java.lang.String) in org.w3c.dom.Document cannot
be applied to () Text index = request.createTextNode();
here is the source code:
import java.net.*;
import java.io.*;
import org.w3c.dom.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.dom.DOMSource;
public class xml2jsp {
private static String server
= "http://webservices.amazon.com/onca/xml?Service=AWSECommerceService&SubscriptionId=026CJ8XE8ZGWH4H58YG2&AssociateTag=" +
                                   "bookinscom-20&Operation=ItemLookup&IdType=ASIN&ItemId=0060006781&ResponseGroup=Reviews";
public static void main(String[] args) {
//String server = DEFAULT_SERVER;
try {   
          // Build the request document
          DocumentBuilderFactory builderFactory
          = DocumentBuilderFactory.newInstance();
          DocumentBuilder builder
          = builderFactory.newDocumentBuilder();
          Document request = builder.newDocument();
          Element methodCall = request.createElement("methodCall");
          request.appendChild(methodCall);
          Element methodName = request.createElement("methodName");
          Text text = request.createTextNode("calculatexml2jsp");
          methodName.appendChild(text);
          methodCall.appendChild(methodName);
          Element params = request.createElement("params");
          methodCall.appendChild(params);
          Element param = request.createElement("param");
          params.appendChild(param);
          Element value = request.createElement("value");
          param.appendChild(value);
          // Had to break the naming convention here because of a
          // conflict with the Java keyword int
          Element intElement = request.createElement("int");
          Text index = request.createTextNode();
          intElement.appendChild(index);
          value.appendChild(intElement);
          // Transmit the request document
          URL u = new URL(server);
          URLConnection uc = u.openConnection();
          HttpURLConnection connection = (HttpURLConnection) uc;
          connection.setDoOutput(true);
          connection.setDoInput(true);
          connection.setRequestMethod("POST");
          OutputStream out = connection.getOutputStream();
          TransformerFactory xformFactory
          = TransformerFactory.newInstance();
          Transformer idTransform = xformFactory.newTransformer();
          Source input = new DOMSource(request);
          Result output = new StreamResult(out);
          idTransform.transform(input, output);
          out.flush();
          out.close();
          // Read the response
          InputStream in = connection.getInputStream();
          Document response = builder.parse(in);
          in.close();
          connection.disconnect();
          NodeList doubles = response.getElementsByTagName("double");
          Node datum = doubles.item(0);
          Text result = (Text) datum.getFirstChild();
          System.out.println(result.getNodeValue());
catch (Exception e) {
System.err.println(e);
Please send your valueable suggestions to sort out the error.
Looking forward for your favourable reply.
Regards
Sridhar

Answer 1

You need to spcify a string when you try to create a text node. If your goal is to have the <int> element with no content (like either <int></int> or <int/>) then do not create the text node and that will be the result.
Dave Patterson