How to send commands to the controller from under Java?

Question

Java

There is a list of commands, but I don’t understand how to transfer them.
For example, there is a command to get the device status:
03h
I send it like this:
address, com, -, -, -, -, crc low, crc hi
1, 3, 0, 0, 0, 0, crc low, crc hi
crc low , crc hi is a checksum that is automatically calculated by the software. The
question is, how can I send the following commands as byte:
-05h
A0h
90h
A1h
?
I would like to see how to correctly send these commands using some examples written in java, and ideally under Android

Answer 1

It is not clear what is not clear. )))

byte cmd[] = {0x01, 0x05, 0x00, 0x00, 0x00, 0x00, crc low, crc hi}
SomeStream s = ...
s.write(smd);

UPD:
For the byte to be unsigned
byte b = (byte)(0xFF & 0x90); // b == 144