private static String addSpaces(String value) {
        final int length = value.length();
        final int lastPossibleBlock = length - 4;
        final StringBuilder sb = new StringBuilder(length + (length - 1) / 4);
        int i;
        for (i = 0; i < lastPossibleBlock; i += 4) {
            sb.append(value, i, i + 4);
            sb.append(' ');
        }
        sb.append(value, i, length);
        return sb.toString();
    }
private static String addSpaces ( String value ) { final int length = value . length ( ) ; final int lastPossibleBlock = length - 4 ; final StringBuilder sb = new StringBuilder ( length + ( length - 1 ) / 4 ) ; int i ; for ( i = 0 ; i < lastPossibleBlock ; i += 4 ) { sb . append ( value , i , i + 4 ) ; sb . append ( ' ' ) ; } sb . append ( value , i , length ) ; return sb . toString ( ) ; }
Converts a plain to a pretty printed IBAN

@param value
plain iban
@return pretty printed IBAN