Getting the CRC checksum of a byte array and adding it to that byte array

Question

I have this byte array:

static byte[] buf = new byte[] { (byte) 0x01, (byte) 0x04, (byte)0x00, (byte)0x01,(byte)0x00, (byte) 0x01};

Now, th

Answer 1

Would CRC32 do, or does it have to be CRC16? If 32 is okay, have you tried using the CRC32 in java.util.zip?

import java.util.zip.CRC32;

byte[] buf = new byte[] { (byte) 0x01, (byte) 0x04, (byte)0x00, (byte)0x01,(byte)0x00, (byte) 0x01};
CRC32 crc32 = new CRC32();
crc32.update(buf);
System.out.printf("%X\n", crc32.getValue());

The output is:

F9DB8E67

Then you can do whatever additional calculation you want on top of that.