Method: Returns TRUE if every character in text is a lowercase letter.

Method: Returns TRUE if every character in text will actually create output (including blanks). Returns FALSE if text contains control characters or characters that do not have any output or control function at all.

Method: Returns TRUE if every character in text is printable, but neither letter, digit or blank, FALSE otherwise.

Method: Returns TRUE if every character in text creates some sort of white space, FALSE otherwise. Besides the blank character this also includes tab, vertical tab, line feed, carriage return and form feed characters.

Method: Returns TRUE if every character in text is an uppercase letter.

Method: Returns TRUE if every character in text is a hexadecimal ‘digit’, that is a decimal digit or a character from [A-Fa-f] , FALSE otherwise.