Datagram byte[] values over 2^7-1

Thread view:

mswope - 20 Apr 2005 17:27 GMT

Howdy!
I'm trying to construct an UDP datagram packet with an array of values. Two
of the values should be 0xC1 and 0xEA (as captured on the wire).
If I build a byte array with these values, I get a loss of precision
warning.

How can I send values larger than 2^7-1 in a datagram packet array?

Thanks,
mas

Reply to this Message

Thomas Fritsch - 20 Apr 2005 18:15 GMT

> Howdy!
> I'm trying to construct an UDP datagram packet with an array of values. Two
[quoted text clipped - 6 lines]
> Thanks,
> mas

Use negative byte values. Or use type-casts, for example:
(byte) 0xC1
Remember: the Java 'byte' is signed, in the range from -128 to +127.

Signature

"Thomas:Fritsch$ops:de".replace(':','.').replace('$','@')

Reply to this Message

mswope - 20 Apr 2005 20:16 GMT

>> Howdy!
>> I'm trying to construct an UDP datagram packet with an array of values.
[quoted text clipped - 10 lines]
> (byte) 0xC1
> Remember: the Java 'byte' is signed, in the range from -128 to +127.

Thomas,
I do remember that 'byte' is signed, thus my question. I used type-casting
per each affected element of the array and
it worked.
Thank you!

mas

Reply to this Message

Boudewijn Dijkstra - 20 Apr 2005 22:35 GMT

>>> Howdy!
>>> I'm trying to construct an UDP datagram packet with an array of values.
[quoted text clipped - 15 lines]
> per each affected element of the array and
> it worked.

Signed or unsigned, it will preserve values in any 256-sized range, including
0..255 and -128..127.

Well, as long as you remember which range it is. ;)

Reply to this Message

Datagram byte[] values over 2^7-1

Free Magazines