Does Stream.boxed() preserve order?

Question

Assume I have an infinite Stream.

IntStream istream = IntStream.iterate(0, i -> i + 1).limit(100);
Stream<Integer> boxedStream = istream.boxed();

Does the boxed() method preserve order? Probably yes, but I cannot find it in the documentation.

Answer 1

Actually every intermediate operation preserves an order by default. The only exceptions are:

• unordered() which removes the ordering constraint.
• sorted() which changes the order.

When it's not explicitly specified, you can assume that operation keeps the order. Even distinct() keeps the order, though it adds much complexity for parallel stream.