public   class  TestWebService {

     public  String getString() {
         return  "test";
    }

     public  ArrayList getCollection() {
         return   new  ArrayList();
    }
}

 import  java.util.ArrayList;
 import  javax.xml.namespace.QName;
 import  org.apache.axis2.AxisFault;
 import  org.apache.axis2.addressing.EndpointReference;
 import  org.apache.axis2.client.Options;
 import  org.apache.axis2.rpc.client.RPCServiceClient;

 public   class  WebServiceRPCClient {

     public   static   void  main(String[] args1)
             throws  AxisFault {
         try  {
            RPCServiceClient serviceClient =  new  RPCServiceClient();

            Options options = serviceClient.getOptions();

            EndpointReference targetEPR =  new  EndpointReference(
                                                                "http://127.0.0.1:7001/axis2/services/PaymentWebService");
            options.setTo(targetEPR);

            QName opEntry =  new  QName("http://me.ru/xsd", "getCollection");
            Object[] opArgs =  new  Object[] {};
             Class [] returnTypes =  new   Class [] {ArrayList. class };

            Object[] response = serviceClient.invokeBlocking(opEntry, opArgs, returnTypes);

            ArrayList result = (ArrayList) response[ 0 ];
        }
         catch  (Exception e) {
            e.printStackTrace();
        }
    }
}