Constructor.
Gets the text for the specified field value, locale and style for the purpose of printing.
Gets an iterator of text to field for the specified style for the purpose of parsing. !(p) The iterator must be returned _in order from the longest text to the shortest.
Stores the text for a single locale. !(p) Some fields have a textual representation, such as day-of-week or month-of-year. These textual representations can be captured _in this class for printing and parsing. !(p) This class is immutable and thread-safe.