intTo32bitBCD Java

gistfile1.java

public static byte[] intTo32BitBCD(Integer data) {
        if (i == null) {
            i = 0;
        }

        /* NumberFormat will format the integer and return a string with length 8 */
        NumberFormat numberFormat = NumberFormat.getNumberInstance();
        numberFormat.setMaximumFractionDigits(0);
        numberFormat.setMinimumIntegerDigits(8);
        numberFormat.setMaximumIntegerDigits(8);
        numberFormat.setGroupingUsed(false);

        String integerString = numberFormat.format(data);

        //Calculate BCD :)
        int size = integerString.length(); //always 8
        byte bcd[] = new byte[4];
        int index = 0;
        boolean advance = size % 2 != 0;
        
        for (char c : integerString.toCharArray()) {
            byte tmp = (byte) (c - '0');
            if (advance) {
                bcd[index++] |= tmp;
            } else {
                bcd[index] |= (byte) (tmp << 4);
            }
            advance = !advance;
        }
        return bcd;
    }