Is Java case-sensitive string sorting broken?

Question

I’ve tried to case-sensitive sort some strings in Java and I was quite surprised by the result. Here is the code:

List<String> words = List.of("aLocalized", "aaLocalized", "aaaLocalized", "ALocalized", "AALocalized", "AAALocalized");
System.out.println(words.stream().sorted().collect(Collectors.joining(" ")));

And here is the result: AAALocalized AALocalized ALocalized aLocalized aaLocalized aaaLocalized

To me this doesn’t look right. Why for small letters a comes before aa and aa comes before aaa, but for capital letters AAA comes before AA and AA comes before A?

Answer 1

What you maybe fail to realize is that all capital letters come before small letters. So a List.of("A", "a", "B", "b", "C", "c"); would result in A B C a b c

Answer 2

This post helped me when I faced this issue

https://cursos.alura.com.br/forum/topico-pumpandsettle-timed-out-175044

so basically remove the tester.pumpAndSettle()

and replace it with

for (int i = 0; i < 5; i++) { await tester.pump(Duration(seconds: 1)); }