Java – why is maptoint() not in the optionalint class?

The intstream class has map(), maptoobj(), maptolong() and maptodouble() methods, but these methods seem to be missing from the optionalint class

Are there good reasons why these methods are flawed?

Solution

It's quite dull. You can do it

OptionalInt oi = OptionalInt.of(1);
oi.ifPresent(i -> IntStream.of(i).map(j -> j + 1).forEach(System.out::println));

However, it is not clear why optionalint has a different approach from intstream, but I noticed that the optional has a subset of stream