Implementing class used in Constructor Interface parameter

Asked Jan 16 '17 at 00:04

Active Jan 16 '17 at 00:04

Viewed 19 times

public interface Photo {
}

class PlacePhoto implements Photo{}

class PlaceDetail {
  public PlaceDetail(List<Photo> photos)
}

List<PlacePhoto> placePhotos = new ArrayList<PlacePhoto>();

The below line fails type checking: expected argument (List<Photo>) cannot be applied to actual (List<PlacePhoto>)

PlaceDetail placeDetail = new PlaceDetail(placePhotos);

If PlacePhoto implements Photo, why can I not use it for a Photo parameter?

asked Jan 16 '17 at 00:04

Baker

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See the answer for why it doesn't work and the question for the solution. – shmosel Jan 16 '17 at 00:08
@shmosel Looks like inheritance is more appropriate than interface implementation in this case. Thanks. – Baker Jan 16 '17 at 20:44

Implementing class used in Constructor Interface parameter

0 Answers0