Is there a better way for getting rid of accents and making those letters regular apart from using String.replaceAll()
method and replacing letters one by one?
I think the best solution is converting each char to HEX and replace it with another HEX. It's because there are 2 Unicode typing:
Composite Unicode
Precomposed Unicode
For example "Ồ" written by Composite Unicode is different from "Ồ" written by Precomposed Unicode. You can copy my sample chars and convert them to see the difference.
In Composite Unicode, "Ồ" is combined from 2 char: Ô (U+00d4) and ̀ (U+0300)
In Precomposed Unicode, "Ồ" is single char (U+1ED2)
I have developed this feature for some banks to convert the info before sending it to core-bank (usually don't support Unicode) and faced this issue when the end-users use multiple Unicode typing to input the data. So I think, converting to HEX and replace it is the most reliable way.