Method Not Found Error?

Question

I am using an action servlet to call a UseCase Object which calls a Data Access Object and shoot data back to the Servlet and then completes it's task. When when I go to call the UseCase it tells me my method does not exist. Anybody have any ideas.
Thanks in advance
//The Call from the ActionServlet
try {
containers = trackingUC.getContainerListByFreightBill(shipmentTrackForm.getWebID(), freightBillPart1, freightBillPart2) ;
//The UseCase
public Collection getContainerListByFreightBill(String webId, String freightBillPart1, String freightBillPart2)
throws UsecaseException {
//The Data Accessor
public Collection getContainerListByFreightBill(String webId, String freightBillPart1, String freightBillPart2)
throws DataAccessException {
When it gets called and assigned it says it can not find that method. What am I doind wrong.

Answer 1

Hi,
Do u have an interface which is implemented by UseCase class???
For eg:
if you have an interface defined say IUseCase which is implemented by UseCase class and if you create the UseCase object as given below:
IUseCase useCase = new UseCase()
The method implemented in UseCase should also be defined in the interface.