I just need a little help to connect with eCommerce API. Could anyone please give a JAVA sample code

public static void main(String[] args) throws RemoteException, MalformedURLException {

                    String endpoint = "https://CC.sys.com/CatalystWebS1ervice/CatalystEcommerceWebservice.asmx?WSDL"; // endpoint url can be found under Site Settings -> API -> click on eCommerce and copy the URL on the browser here.

                    CatalystEcommerceWebserviceSoapProxy sq = new CatalystEcommerceWebserviceSoapProxy(endpoint);

                    Products[] prod = new Products[2];

                    prod = sq.product_ListRetrieve(Username , Password, SiteID, CatalogueID);

                    System.out.println(prod[1].getDescription());

          }