接口类

Question

 public class InterfaceManager
    {
       private static IVehicleCommunicationCtrl _bizCtrl = null;//为什么要定义方法的引用？不定义不是也可以访问方法么？
       private static IGpsReceiveCtrl _gpsCtrl = null;       public static IVehicleCommunicationCtrl GetVehicleCommunicationCtrl() //接口中定义静态方法有什么好处？
        {...}
       public static IGpsReceiveCtrl GetGpsReceiveCtrl()
         {...}    }

Answer 1

public static IVehicleCommunicationCtrl GetVehicleCommunicationCtrl() 
{
 if (_bizCtrl == null)
                {
                    _bizCtrl = new VehicleCommunicationCtrlClass();
                }
}

Answer 2

good good study,day day up

Answer 3

public class InterfaceManager
{
     private static IVehicleCommunicationCtrl _bizCtrl = null;
     public static IVehicleCommunicationCtrl GetVehicleCommunicationCtrl() 
     {
        if (_bizCtrl == null)
        {
        _bizCtrl = new VehicleCommunicationCtrlClass();
         }
      }
}那这样写有什么用么？