Can synchronized blocks be faster than Atomics?

Question

Suppose two following counter implementations:

class Counter {
  private final AtomicInteger atomic = new AtomicInteger(0);
  private int i = 0;

  public void i         


        

Answer 1

As others have said this is implementation dependent . But keep in mind that if your program invariants involve more than one variable , then you have to use synchronization to update them together . You can't do atomic operation on two related variables together just because they are of Atomic type. In that case your only friend is synchronized .