Field 'Display' inserting activities?

Question

I'm inserting a new Activity with a WSDL and have this error: Field "Display" is required. What is this field? i can't find it in activity.wsdl
This is the code:
Activity actividad = new Activity();
ActivityNWS_Activity_Insert_Input objParam = new ActivityNWS_Activity_Insert_Input();
ActivityNWS_Activity_Insert_Output qRet;
actividad.Url = string.Format(surl, sSessionID);
actividad.CookieContainer = GetCookieContainer();
objParam.ListOfActivity = new Activity1[1];
objParam.ListOfActivity[0] = new Activity1();
objParam.ListOfActivity[0].OwnerExternalSystemId = "12345";
objParam.ListOfActivity[0].Subject = "test";
objParam.ListOfActivity[0].Description = "test2";
actividad.Activity_Insert(objParam);

Answer 1

Hi all,
Anyone help me how to access activity web services methods?
I have used Axis tool kit to generate the stubs and written java client as below.
code:
Activity_ServiceLocator sLoc = new Activity_ServiceLocator();
String url = sLoc.getDefaultAddress() + "/activity;jsessionid="+ SessionString;
sLoc.setDefaultEndpointAddress(url);
Default_BindingStub oClient = (Default_BindingStub)sLoc.getDefault();
ActivityNWS_Activity_QueryPage_Input queryInput = new ActivityNWS_Activity_QueryPage_Input();
ActivityNWS_Activity_QueryPage_Output queryOutput = null;
queryInput.setUseChildAnd("false");
queryInput.setPageSize("20");
queryInput.setStartRowNum("0");
//I Stucked here how to set ListOfActivity. Please post some sample to set input and get output of the queryPage
Activity_Type[] at = queryInput.getListOfActivity();
at[1].getAccountId();
queryInput.setListOfActivity(av);
queryOutput = oClient.activity_QueryPage(queryInput);
System.out.println(queryOutput.toString());
After running this am getting the NullPionterException. Please please give me hints by posting the sample code?
-Vishawnath