Converts all of the characters in this
String to upper
case using the rules of the default locale. This method is equivalent to
Note: This method is locale sensitive, and may produce unexpected
results if used for strings that are intended to be interpreted locale
Examples are programming language identifiers, protocol keys, and HTML
"title".toUpperCase() in a Turkish locale
"T\u0130TLE", where '\u0130' is the
LATIN CAPITAL LETTER I WITH DOT ABOVE character.
To obtain correct results for locale insensitive strings, use
String, converted to uppercase.