Specify binary digits length for Java AtomicInteger

Asked Oct 23 '15 at 18:38

Active Oct 23 '15 at 18:38

Viewed 242 times

Java AtomicInteger is using the regular 4 bytes length of int.

If we run the following code

AtomicInteger i = new AtomicInteger(Integer.MIN_VALUE);
System.out.println(i);
i.decrementAndGet();
System.out.println(i);

We will get

-2147483648
2147483647

Is there a way to set the size of the atomic integer, to make it 20 bits long instead of 32 bits and maintain the atomicity?

for example, the new result will be

-524288
524287

which is -2^19 and 2^19-1

asked Oct 23 '15 at 18:38

Yifei

for what purpose do you need to restrict `AtomicInteger` to only 20 bits? – user1231232141214124 Oct 23 '15 at 18:46
2

I would just write my own based on the code for `AtomicInteger`. – Chris Fei Oct 23 '15 at 18:49
1

You could build something similar to http://stackoverflow.com/a/4811021/285976 using modulo 2^20. – Chris Fei Oct 23 '15 at 18:51

0 Answers0