Question

I have this function makeAirportManagers() which should return an ArrayList <MarkerManager> all required variables map, countryMarkers and airportMarkers are global (dirty processing style).

ArrayList  makeAirportManagers(){
  ArrayList  managers = new ArrayList();
  for (Marker country : countryMarkers){
    MarkerManager currentMarkerManager = new MarkerManager();
    for (Marker airport : airportMarkers){
      Location airportLocation = airport.getLocation();
      ScreenPosition airportScreenPos = map.getScreenPosition(airportLocation);
      if(country.isInside(map, airportScreenPos.x, airportScreenPos.y)){
        currentMarkerManager.addMarker(airport);
      }
    }
    currentMarkerManager.disableDrawing();
    managers.add(currentMarkerManager);
    map.addMarkerManager(currentMarkerManager);
    airportManagersBuild = true;
    return managers;
  }
}

The console prints: This method must return a result of Type ArrayList

And really I don’t no why!

In another version of the code, I count the items of managersto make sure it`s not empty and it gets 178 items like expected.

I am using Processing 1.5.1 because of the Unfolding library I’m playing with.

Answer 1

Your return method is inside the for loop. You must move it one line below.