Output as null

[Rodricks george]

Hi,
I have created a jws

   
public class Calculator {
  public int add(int i1, int i2) {
    return i1 + i2; 
  }
 
  public int subtract(int i1, int i2) {
    return i1 - i2;
  }
}
 

if i run this client i am getting result as null. Plese give some idea.

   
String arg1 = "20";
        String arg2 = "20";
 
        String operation = "add";    // could also be "subtract"
        String urn = "CalculatorService";
        String destination = "http://localhost:8080/axis/Calculator.jws";
 
        try
        {
            // First create the connection
            SOAPConnectionFactory soapConnFactory = SOAPConnectionFactory.newInstance();
            SOAPConnection connection = soapConnFactory.createConnection();
 
            // Next, create the actual message
            MessageFactory messageFactory = MessageFactory.newInstance();
            SOAPMessage message = messageFactory.createMessage();
 
            SOAPPart soapPart = message.getSOAPPart();
            SOAPEnvelope envelope = soapPart.getEnvelope();
 
            // This method demonstrates how to set HTTP and SOAP headers.
            // setOptionalHeaders(message, envelope);
 
            // Create and populate the body
            SOAPBody body = envelope.getBody();
 
            // Create the main element and namespace
            SOAPElement bodyElement = body.addChildElement(
                    envelope.createName(operation, "ns1", "urn:"+urn));
            // Add parameters
            bodyElement.addChildElement("in0").addTextNode(arg1);
            bodyElement.addChildElement("in1").addTextNode(arg2);
 
            // Save the message
            message.saveChanges();
 
            // Check the input
          
            System.out.println("\nRequest:\n");
            message.writeTo(System.out);
            System.out.println();
         
 
            // Send the message and get the reply
            SOAPMessage reply = connection.call(message, destination);
            
            // Retrieve the result - no error checking is done: BAD!
            soapPart = reply.getSOAPPart();
            envelope = soapPart.getEnvelope();
            body = envelope.getBody();
           
 
            Iterator iter = body.getChildElements();
            Node resultOuter = ((Node) iter.next()).getFirstChild();
            Node result = resultOuter.getFirstChild();
 
            // Check the output
            /*
            System.out.println("\nResponse:\n");
            // Create the transformer
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            // Extract the content of the reply
            Source sourceContent = reply.getSOAPPart().getContent();
            // Set the output for the transformation
            StreamResult result = new StreamResult(System.out);
            transformer.transform(sourceContent, result);
            System.out.println();
            */