Value does not update in while loop unless printed out [duplicate]

Answer 1

Without seeing any other code there are a number of things that can be going on here. If you give us a short reproduce able example that may help.

As far as 'a number of things' It is possible that the the compiler can re-order the write of size outside of the while loop for instance

int size = t.getSize();
while(working){
   if(size >= 10){ 

   }
}

But again that is just speculation at this point.