ASCIIBits clear(String chars) {
        for (int i=0, n=chars.length() ; i<n ; ++i) {
            char ch = chars.charAt(i);
            if (ch < 64) {
                _lowerMask &= ~(1L << ch);
            } else {
                _upperMask &= ~(1L << ch);
            }
        }
        return this;
    }
ASCIIBits clear(String chars) {
        for (int i=0, n=chars.length() ; i<n ; ++i) {
            char ch = chars.charAt(i);
            if (ch < 64) {
                _lowerMask &= ~(1L << ch);
            } else {
                _upperMask &= ~(1L << ch);
            }
        }
        return this;
    }
ASCIIBits clear ( String chars ) { for ( int i = 0 , n = chars . length ( ) ; i < n ; ++ i ) { char ch = chars . charAt ( i ) ; if ( ch < 64 ) { _lowerMask &= ~ ( 1L << ch ) ; } else { _upperMask &= ~ ( 1L << ch ) ; } } return this ; }
Clears the bit (sets to 0) for each character in the argument string.

@param chars the characters to clear.
@return {@code this}
Clears the bit ( sets to 0 ) for each character in the argument string .