Unicode String Matching

I want to match two strings with Unicode encoding in Java. I want to map something like:

"asdfeo"
"ásdfeó"

How can I return 0 in a method compareTo()?

EDIT:

When I enter a line into the autocomplete view without diacritics (for some reason I don’t have a keyboard to write these diacritics), I want to see sentences between objects with diacritics between autocomplete. That is why I want to overwrite the method compareTo().