Java 8 collect() only isPresent() Optional values [duplicate]

Answer 1

Not sure if its so different but you could just filter based on your optional instead of getting the optional and filtering next. Something like this?

list.stream()
    .filter(e -> myclass.returnsOptional(e).isPresent())
    .collect(Collectors.toList());

Note: This will only work if returnsOptional returns the same object type as your original list item types.