Java how to sort lowercase before uppercase strings

Question

I want the files to be ordered by their abs path name, but I want the lowercase to be sorted before the uppercase. Example: Let\'s say I got 4 files:

files2.         


        

Answer 1

Collections.sort(); lets you pass a custom comparator for ordering. For case insensitive ordering String class provides a static final comparator called CASE_INSENSITIVE_ORDER.

So in your case all that's needed is:

Collections.sort(caps, String.CASE_INSENSITIVE_ORDER);