public static double parseDouble( String buffer, int from, int to ) {
        return CharScanner.parseDouble( FastStringUtils.toCharArray(buffer), from , to );
    }
public static double parseDouble( String buffer, int from, int to ) {
        return CharScanner.parseDouble( FastStringUtils.toCharArray(buffer), from , to );
    }
public static double parseDouble ( String buffer , int from , int to ) { return CharScanner . parseDouble ( FastStringUtils . toCharArray ( buffer ) , from , to ) ; }
parse a double
@param buffer input string
@return value
parse a double