How to use

sum

method

in

gnu.trove.list.TIntList

public int sum() { synchronized( mutex ) { return list.sum(); } }

public int sum()    { return list.sum(); }

@Override
public int sum() { synchronized( mutex ) { return list.sum(); } }

@Override
public int sum()    { return list.sum(); }

public int sum()    { return list.sum(); }

public int sum() { synchronized( mutex ) { return list.sum(); } }

public int sum() { synchronized( mutex ) { return list.sum(); } }

public int sum()    { return list.sum(); }

/**
 * Get total revenue time (in seconds) for set of trips.
 * @param trips
 * @return total revenue time (in seconds)
 */
public long getTotalRevenueTimeForTrips (Collection<Trip> trips) {
  TIntList times = new TIntArrayList();
  for (Trip trip : trips) {
    StopTime first;
    StopTime last;
    Spliterator<StopTime> stopTimes = feed.getOrderedStopTimesForTrip(trip.trip_id).spliterator();;
    first = StreamSupport.stream(stopTimes, false)
        .findFirst()
        .orElse(null);
    last = StreamSupport.stream(stopTimes, false)
        .reduce((a, b) -> b)
        .orElse(null);
    if (last != null && first != null) {
      // revenue time should not include layovers at termini
      int time = last.arrival_time - first.departure_time;
      times.add(time);
    }
  }
  return times.sum();
}

 TIntList tt = new TIntArrayList();
tt.add(1);
tt.add(2);
tt.add(3);
int sum = tt.sum();

return deltas.sum() / deltas.size();