binary Search

[Birbal]

hi frieds,

I am facing problem in Binary Search

my code is under following


int binarySearch(byte[] a, byte key)
{
int low=0;
int hi=a.length -1;
int mid=0;
while(low<=hi)
{
mid= (low+ hi)>>1;
final byte d= a[mid];
if (d==key)
return mid;
else if (d>key)
hi=mid-1;
else

low=++mid;
}
return -mid -1;
}




please check it and why it is not working,
if u have code , please give me.