Thread: Socket connections and Unsigned values

unsigned values when using sockets

Not sure what the relationship is between signs and sockets.
Can you explain?

The problem mostly happens when compiler expands bytes to ints, spreading the sign bit. If you know the compiler is doing that, AND the int with 0xFF to remove the spread sign bits.

In most cases if I feel I need a bigger number than offered I would just use the next step method and use a long rather than an int. I don't believe the overhead is that massive for this and especially if you use primitives the JVM handles those brilliantly for you.

It's an interesting question though.

// Json

Not sure how understanding your data is related to using sockets.

the issue comes when doing arithmetic in the Java program

Can you explain this bit?
If the data your java program is reading from an int field that has the H.O. bit = 1 (ie an unsigned 4 billion value) then java would treat it as negative. If your data values are that large, I guess you need to expand the field.
If you wanted to be able to set values that large in an unsigned int field, you could assign the value to a long and then AND the long with 0xFFFFFFFF to strip the sign bits.