Unicode-correct title case in Java

Question

I\'ve been looking through all StackOverflow in the bazillion of questions about capitalizing a word in Java, and none of them seem to care the least about internationalizat

Answer 1

Like you, I was unable to find a suitable method in the core Java API.

However, there does seem to be a locale-sensitive string-title-case method (UCharacter#toTitleCase) in the ICU library.

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Looking at the source for the relevant ICU methods (UCharacter#toTitleCase and UCaseProps#toUpperOrTitle), there don't seem to be many locale-specific special cases for title-casing, so you might be able to get away with the following:

1. Find the first cased character in the string.
2. If it has a title-case form distinct from its upper-case form, use that.
3. Otherwise, perform a locale-sensitive upper-case on that first character and its combining characters.
4. Perform a locale-sensitive lower-case on the rest of the string.
5. If the locale is Dutch and the first cased character is an "I" followed by a "j", upper-case the "j".