training_data.Add(user_mapping.ToInternalID(uid), item_mapping.ToInternalID(iid));
checkForStop();
}
System.out.println(training_data.GetMaxItemID()+" "+training_data.GetMaxUserID());
Random recommendAlg=new Random();
recommendAlg.SetFeedback(training_data);
recommendAlg.user_mapping=user_mapping;