Convert upper case text to mixed case in English language using Java tool

[Sam Gehouse]

Anyone aware of any free or licensed Java based product for converting upper case text into mixed case, as understood by English language?

All the text characters are saved in upper case in the database. Can we convert the entire text into mixed case to the best of its knowledge, as understood best by the English language.

For example, text saved in database as:

MY NAME IS JACK

The goal is to use some kind of utility, or rules engine that will convert the text above into:

My name is Jack

The above is only one example.