Question

i am facing one problem.i have a class named “ReportingService” and it should be singleton and is is extending “CommonService”.

package MyApp.Services.ReportingService;

public class ReportingService extends CommonService {

    private static ReportingService instance = null;

    public static ReportingService getInstance() {
        if (instance == null) {
            instance = new ReportingService();
        }
        return instance;   

    }
}

and to access this class in other class i am using

package MyApp.Services.WebReportingService;
@WebMethod(operationName = "registerUDP")
    public boolean registerUDP(
            @WebParam(name = "Friendly Name") String friendlyName,
            @WebParam(name = "Username") String username,
            @WebParam(name = "Password") String password,
            @WebParam(name = "Communication Protocol") CommunicationProtocol communicationProtocol,
            @WebParam(name = "IP Address") String ipAddress,
            @WebParam(name = "Port") int port) {

        Consumer client = new Consumer(friendlyName, username, password, communicationProtocol, ipAddress, port);

ReportingService rs = ReportingService.
        return true;

    }

in “ReportingService rs = ReportingService.” it is not showing me getInstance() method of ReportingService class. I also imported correct packages.

NOTE: both classes are in different packages.

Answer 1

I think your package names are broken. You seem to have the name of the class at the end of the package – but the name of the class only appears when you import.

So you would have :

package myApp.Services;

public class ReportService extends CommonService {/* code goes here */}

but then you would include:

import myApp.Services.ReportService;

Same goes for the WebReportingService. The package statement should not include the class name

Edit: if you actually want ReportService in package myApp.Services.ReportService, then you need to import myApp.Services.ReportService.ReportService (or, alternatively, myApp.Services.ReportService.*, but this is not recommended unless you need many classes from the package)