Menu
If I have a byte, how would the method look to retrieve a bit at a certain position?
Here is what I have know, and I don't think it works.
public byte getBit(int position) { return (byte) (ID >> (position - 1)); } where ID is the name of the byte I am retrieving information from.
211
For accessing a specific bit, you can use Shift Operators . If it is always a 1 that you are going to reset, then you could use an & operation. But, if it can also take 0 value, then & operation will fail as 0 & 1 = 0 . You could use | (OR) during that time.
You can mask out the bits you want from a byte using bitwise AND. In general, to test for individual bits, C has bitwise operators. Example: SO: C/C++ check if one bit is set in, i.e. int variable.
Use Long. toString with the radix: String bits = Long. toString(someLong, 2);
public byte getBit(int position) { return (ID >> position) & 1; } Right shifting ID by position will make bit #position be in the furthest spot to the right in the number. Combining that with the bitwise AND & with 1 will tell you if the bit is set.
position = 2 ID = 5 = 0000 0101 (in binary) ID >> position = 0000 0001 0000 0001 & 0000 0001( 1 in binary ) = 1, because the furthest right bit is set. If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
