Does Java have an alphabetical order like this?

Like in this example, https://www.duden.de/rechtschreibung/Regen_Niederschlag , the words are sorted in the following way: "regelwidrig, Regelwidrigkeit, Regelzeit, regen, Regen, Regenabflussrohr, Regenanlage, regenarm, Regenbö, Regenbogen..." that is, it is a "more non-case-sensitive" sorting than Collections.Sort() automatically does. Lowercase words come before uppercase ones like "regen, Regen".

ArrayList<String> regen = new ArrayList<String>( );
for(String x : new String[]{"regelwidrig", "Regelwidrigkeit", "Regelzeit",
        "regen", "Regen", "Regenabflussrohr",
        "Regenanlage", "regenarm", "Regenbö", "Regenbogen"}) {
        regen.add(x);
}

Collections.sort(regen) response:

[Regelwidrigkeit, Regelzeit, Regen, Regenabflussrohr, Regenanlage, Regenbogen, Regenbö,
regelwidrig, regen, regenarm]// lowercase at the end

I can implement a comparator for this, but I'd rather take one-liner of code to get this way of sorting. Such as: Collections.SomeMethod(regen); or Collections.Sort(regen, some_extra_parameter); But I haven't found after deep google search, unfortunately.

• You can use String.CASE_INSENSITIVE_ORDER to order strings in case-insensitive way.

• If you also at the same time want to farther specify order of elements which current comparator considers as equal (like String.CASE_INSENSITIVE_ORDER would do for "Regen" and "regen") then you can use Comparator#thenComparing method and pass to it Comparator which would sort those equal elements like you want.

  • Assuming you would also want to order "Regen", "regen" as "regen", "Regen" (lower-case before upper-case) you can simply reverse their natural order with Comparator.reverseOrder().

So your code can look like:

regen.sort(String.CASE_INSENSITIVE_ORDER.thenComparing(Comparator.reverseOrder()));

Demo:

ArrayList<String> regen = new ArrayList<String>(
        Arrays.asList("regelwidrig", "Regelwidrigkeit", "Regelzeit",
            "Regen", "regen", "Regenabflussrohr",
            "Regenanlage", "regenarm", "Regenbö", "Regenbogen")
);

regen.sort(String.CASE_INSENSITIVE_ORDER.thenComparing(Comparator.reverseOrder()));
System.out.println(regen);

Result: [regelwidrig, Regelwidrigkeit, Regelzeit, regen, Regen, Regenabflussrohr, Regenanlage, regenarm, Regenbogen, Regenbö]

(notice "Regen", "regen" ware swapped)