public static String rpad ( String base , Integer len , String pad ) { if ( len < 0 ) { return null ; } else if ( len == 0 ) { return "" ; } char [ ] data = new char [ len ] ; int pos = 0 ; // Copy the base for ( ; pos < base . length ( ) && pos < len ; pos ++ ) { data [ pos ] = base . charAt ( pos ) ; } // Copy the padding for ( ; pos < len ; pos += pad . length ( ) ) { for ( int i = 0 ; i < pad . length ( ) && i < len - pos ; i ++ ) { data [ pos + i ] = pad . charAt ( i ) ; } } return new String ( data ) ; }
Returns the string right - padded with the string pad to a length of len characters . If str is longer than len the return value is shortened to len characters .