Question

I have got the String MacAddress, which i need to convert in to a byte array. Java wouldn’t let me do a direct conversion throwing a numberformat exception. This is what I’m doing right now

clientMac[0] = (byte)Integer.parseInt(strCameraMacId.substring(0, 2));

I tried doing it step by step

String mc = strCameraMacId.substring(0,2);
        int test = Integer.parseInt(mc);
        clientMac[0] = (byte) test;

But the String mc consists of a value “08” and after doing the int to byte converion im losing the zero.
the mac address im trying to convert is “08-00-23-91-06-48” and I might end up losing all the zeros. will I? and has anyone got an idea regarding how to approach this issue?

Thanks a lot

Answer 1

The zero is going to be implied in the byte value. Remember that 0x08 == 8. You should be able to convert your to an array of 6 bytes. Youre approach is fine, just remember that if you are going to convert this back to a string, that you need to let Java know that you want to pad each number back to 2 chars. That will put your implied zeros back in place.