Possible loss of precision in java declaring bytes

Question

I'm currently attempting to write a serial implementation of MODbus in java. The main problem I'm having is that when I declare a byte (or short for that matter) as something like 0xC4 (for a byte) I get a "Loss of precision error".

Is there someway around this? Or am I forced to treat all numeric types like their 1 bit shorter then they really are (ala 7bit, 15 bit, 31 bit, 63 bit)?

And example:

 byte[] test = 
    {
        0x11,
        0x02,
        0x00,
        0xC4,
        0x00,
        0x16
    };

This throws a warning on 0xC4 that "Possible loss of precision" required byte, found int.

Answer 1

When you say 0xC4, that is an integer literal that is bigger than the maximum value for a byte, 127, so you must explicitly cast it to a byte.

Try

byte[] test = 
{
    0x11,
    0x02,
    0x00,
    (byte) 0xC4,
    0x00,
    0x16
};