Reports redundant Stream or Optional calls like map(x -> x) or filter(x -> true), redundant sorted or distinct.

Note that a mapping operation in code like streamOfIntegers.map(Integer::valueOf) works as requireNonNull check: if the stream contains null, it throws a NullPointerException, thus it's not absolutely redundant. Disable the Report redundant boxing in Stream.map option if you do not want such cases to be reported.

This inspection only reports if the language level of the project or module is 8 or higher.