BCD Length From Long

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public static byte[] intToBCDBytes(long num) { return intToBCDBytes(num, 0); } public static byte[] intToBCDBytes(long num, int minBytes) { int digits = 0; long temp = num; while (temp != 0) { digits++; temp /= 10; } int byteLen = digits % 2 == 0 ? digits / 2 : (digits + 1) / 2; boolean isOdd = digits % 2 != 0; if (byteLen < minBytes) byteLen = minBytes; byte bcd[] = new byte[byteLen]; for (int i = 0; i < digits; i++) { byte tmp = (byte) (num % 10); if (i == digits - 1 && isOdd) bcd[i / 2] = tmp; else if (i % 2 == 0) bcd[i / 2] = tmp; else { byte foo = (byte) (tmp << 4); bcd[i / 2] |= foo; } num /= 10; } for (int i = 0; i < byteLen / 2; i++) { byte tmp = bcd[i]; bcd[i] = bcd[byteLen - i - 1]; bcd[byteLen - i - 1] = tmp; } return bcd; } public static String bcdToString(byte bcd) { StringBuffer sb = new StringBuffer(); byte high = (byte) (bcd & 0xf0); high >>>= (byte) 4; high = (byte) (high & 0x0f); byte low = (byte) (bcd & 0x0f); sb.append(high); sb.append(low); return sb.toString(); } public static Integer bcdToInt(byte[] bcd) { StringBuffer sb = new StringBuffer(); for (int i = 0; i < bcd.length; i++) { sb.append(bcdToString(bcd[i])); } return new Integer(sb.toString()); }