Converts all of the characters in this
String to lower case using the rules of the given
Locale. Case mapping is based on the Unicode Standard version specified by the {@link java.lang.Character Character}class. Since case mappings are not always 1:1 char mappings, the resulting
String may be a different length than the original
String.
Examples of lowercase mappings are in the following table:
| Language Code of Locale | Upper Case | Lower Case | Description |
| tr (Turkish) | \u0130 | \u0069 | capital letter I with dot above -> small letter i |
| tr (Turkish) | \u0049 | \u0131 | capital letter I -> small letter dotless i |
| (all) | French Fries | french fries | lowercased all chars in String |
| (all) |    |    | lowercased all chars in String |
@param locale use the case transformation rules for this locale
@return the
String, converted to lowercase.
@see java.lang.String#toLowerCase()
@see java.lang.String#toUpperCase()
@see java.lang.String#toUpperCase(Locale)
@since 1.1