How to assign Signed integer value to byte.

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Hello Developer,
Any body tell me,
hows signed integer value assigned to byte value.
I want to migrate one java code line to C#
This is java code

abyte3[l++] = (new Integer(i<<4 | j)).byteValue();

This java line assigned signed integer to byte value and store in byte array.
This code i have migrate in c#.
I used this line of code in c#,

abyte3[l++] = (byte)(i<<4 | j)

but this only give the correct output upto 0 to 255 value and not take negative signed integer.
Any body tell me, Alternative of java .bytevalue() method in c#.

Regards,
Ravi

Posted 2-May-11 20:56pm

Ravi Sharma 2

Updated 2-May-11 20:57pm

Rajesh Anuhya

v2

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BobJanova · Answer 1 · 2011-05-03T00:42:00

Your code snippet is correct. The difference is that byte in Java is signed (-128 to +127) and in C#/.Net it is unsigned (0 to 255). In both cases they will contain the same 8 bits, and depending on what you want to do with them next, this may or may not matter. (For example, reconstructing a string, saving to file, throwing down a socket and other such uses of a byte 'stream' will work the same way in both. But anything involving arithmetic, other than ~, & and |, will be different.)

If the sign is important to you you should use sbyte, not byte, in .Net.

OriginalGriff · Answer 2 · 2011-05-02T21:03:00

Solution 1

Look at the System.BitConverter.GetBytes method: MSDN[^]
You can then select the least signficant byte if that is what you need.

Posted 2-May-11 21:03pm

OriginalGriff

Comments

Ravi Sharma 2 3-May-11 6:16am

Sir i try this but its not work, because its convert only unsigned integer not signed intger.I want conversion ,who accept both signed and unsigned integer.

OriginalGriff 3-May-11 6:55am

See BobJanova's answer re the relevance of signed / unsigned bytes.