Java 8/9: Can a character in a String be mapped to its indices (using streams)?

Question

Given a String s and a char c, I\'m curious if there exists some method of producing a List list from s (where

Answer 1

An alternate in Java9 could be to make use of the iterate(int seed, IntPredicate hasNext,IntUnaryOperator next) as follows:-

private static List getIndexList(String word, char c) {
  return IntStream
          .iterate(word.indexOf(c), index -> index >= 0, index -> word.indexOf(c, index + 1))
          .boxed()
          .collect(Collectors.toList());
}