Switch Case statement or its alternate If Condition is not working in android

I as using switch case for Condition check. It is not working. Here how I have implemented.

 @Override
public void onReceiveNotification(String notificationType, String message, String flag) {
    super.onReceiveNotification(notificationType, message, flag);
    Log.d("tag", "==onReceive Notivation====1===" + notificationType);
    if (notificationType.equalsIgnoreCase("MULTIPART_TYPES"))
    {
        Log.d("tag", "==onReceive Notivation===2====" + notificationType);
    }
    switch (notificationType) {
        case "MULTIPART_TYPES":
            Log.d("tag", "==onReceive Notivation=======" + message);
            break;
    }
}

However it is entering into the method with respected string message. But it is not entering to the either to switch or if conditions. Any solution is appreciated