Help me with byte and bits

[John Cobra]

Hi all,

i have a problem... and maybe you can help

in the end i need a Byte with the "0" and "1" in the position that i want..

it means...

if (...){
set in the position x the value "1"
}

so in the begin i need a byte like 00000000

and then i start setting "1" in each position...


how can i do this??
any good soluction?

thanks a lot.

[John Cobra]

If i have string like

string bits = "00010010";

this will work?

byte bits = Byte.parseByte(bits , 2);

??

[fred rosenberger]

I wouldn't use a string at all. I'd use a byte, a bit mask, and bit-shift operations.

[John Cobra]

can you give a small example??

thanks

[fred rosenberger]

I don't have time to put together formal code...beside, you'll learn more if you do it. but, in a nutshell, i'd do something like this:

byte finalValue = 0;  //set all bits to '0'
byte mask = 1;          //set bit pattern to '0000 0001'
int x = 3                  //which bit of finalValue i want to make a '1';

mask << (x - 1);      //shifts the '1' to the correct spot

finalValue | mask;    /bitwise or should set the one new bit, leaving others untouched.