Which of the following functions checks whether a character is a blank or not?

1. Character.isBlankSpace( )
2. Character.isWhiteSpace( )
3. Character.isEmptySpace( )
4. Character.isNull( )

Which of the following statements is true?

1. Character.isLowerCase( ) and Character.toLowerCase( ) are same.
2. Character.isLetter( ) and Character.isAlphabet( ) are same.
3. parse and valueOf functions are same.
4. Character.isDigit( ) and Character.isNumber( ) are same.