Call web service in java

[Harshit]

I am trying to make a program which sends data to web service but I am getting an error. While compiling, I am not getting error but only at runtime, I am getting the error.

import java.util.Iterator;
import javax.xml.soap.*;
import javax.xml.transform.*;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Node;

public class CallWebServiceAdd {

public static void main(String[] args) {
        // TODO code application logic here
        String a = "10";
    String b = "20";

    String op = "Addweb";
    String urn = "WebService1";
    String dest = "http://delecc01.india.jcb.local:8000/sap/bc/srt/wsdl/srvc_002655F3F9821EE5ACEC62338B931F00/wsdl11/allinone/ws_policy/document?sap-client=101";

    try
    {
        SOAPConnectionFactory soapConnFact = SOAPConnectionFactory.newInstance();
        SOAPConnection conn = soapConnFact.createConnection();

        MessageFactory msgFact = MessageFactory.newInstance();
        SOAPMessage msg = msgFact.createMessage();

        String authorization = new sun.misc.BASE64Encoder().encode(("username:password").getBytes());

    SOAPPart soapPart = msg.getSOAPPart();
        SOAPEnvelope envelop = soapPart.getEnvelope();
        envelop.addNamespaceDeclaration("xsd", "http://www.w3.org/2001/XMLSchema");
        SOAPBody body = envelop.getBody();

        SOAPElement bodyelement = body.addChildElement("Addition");
        SOAPElement bodyelement1 = bodyelement.addChildElement("a").addTextNode(a);
        SOAPElement bodyelement2 = bodyelement.addChildElement("b").addTextNode(b);

        MimeHeaders headers = msg.getMimeHeaders();
        headers.addHeader("SOAPAction", "#OP_IF_OP_ZTEST_ALL");
    headers.addHeader("Authorization", "Basic " + authorization);
        msg.writeTo(System.out);
        msg.saveChanges();

        SOAPMessage reply = conn.call(msg, dest);

        soapPart = reply.getSOAPPart();
        envelop = soapPart.getEnvelope();
        body = envelop.getBody();

        Iterator iter = body.getChildElements();
        Node resultOuter = ((Node)iter.next()).getFirstChild();
        Node result = resultOuter.getFirstChild();

        System.out.println("add(" + a + ","+ b + ") = " + result.getNodeValue());
        reply.writeTo(System.out);

        conn.close();
        }
        catch(Exception e)
        {
            System.out.println(e.getMessage());
        }


    }

}

Error

Jan 06, 2
  016 3:27:07 PM com.sun.xml.internal.messaging.saaj.soap.SOAPPartImpl lookForEnve
  lope
  SEVERE: SAAJ0514: Unable to create envelope from given source because the root e
  lement is not named Envelope
  Jan 06, 2016 3:27:07 PM com.sun.xml.internal.messaging.saaj.soap.EnvelopeFactory
  createEnvelope
  SEVERE: SAAJ0511: Unable to create envelope from given source
  Unable to create envelope from given source:

Why this error is coming ?