Question

Suppose I have an

ArrayList<Fruit>

I would like to get all elements from this list of any given subclass of Fruit, such as an

ArrayList<Apple>

C# seems to have a rather handy

OfType<T>() 

method. Is there an equivalent way of doing this in Java?

Cheers

Answer 1

public static <T> Collection<T> ofType(Collection<? super T> col, Class<T> type) {
  final List<T> ret = new ArrayList<T>();
  for (Object o : col) if (type.isInstance(o)) ret.add((T)o);
  return ret;
}