Negative Byte?

Question

Java

Good morning!
There is a Java code like this

public static boolean GMSetGameAttriByte(byte type, byte value) throws Exception {
        OctetsStream os = new OctetsStream();
        os.marshal(value);
        return DeliveryDB.GMSetGameAttri(-1, type, (Octets)os);
    }

    public static byte GMGetDoubleExp() throws Exception {
        return DeliveryDB.GMGetGameAttriByte(-52);
    }

But I can’t understand how to make a negative byte, can someone tell me?
For those in the tank: need to figure out how to send a negative byte in C#.
Thank you.

Answer 1

Firstly, you need a different GMGetGameAttriByte function, with 1 argument, and you have 2, and secondly, what kind of code is this in general?

Answer 2

what's the mess in your head?
a byte is 8 bits. it is neither negative nor positive. these are eight bits, each of which can be either set or reset.
next level.
number encoding. integer (signed/unsigned), fixed point, floating point. you google it yourself.
here's a starter for you: signed integers - the most significant bit is reserved for the sign, from which the number of bits encoding the number decreases, (in the same bytes, unsigned 0-256, signed -127 +128 but a sign appears)
10000001 = this is 129 or minus one.

Answer 3

If you have a server written in one language (Java), and a client in another (C#), byte types do not run between them, they send data to each other. Types are just descriptive structures of a programming language and have nothing to do with data. It's just easier for a programmer to get the value of byte myVar = 129 instead of 10000001.
byte in Java min value = -128, max value = 127.
byte in C# min value = 0, max value = 255
sbyte in C# min value = -128, max value = 127
My opinion is that you are simply entangled in three pines.
Another very important difference between Java and .Net is in byte order . .Net defaults to Little Endian, Java defaults to Big Endian. This information is not specific to your question, but it may be useful in the future.