What does Future.cancel() do if not interrupting?

Question

From java docs on Future.cancel()

boolean cancel(boolean mayInterruptIfRunning)

Attempts to cancel execution of this task. This

Answer 1

nothing will be done if the task has already started and mayInterruptIfRunning is false,

below is the cancel()

public boolean cancel(boolean mayInterruptIfRunning) {
    if (state != NEW)
        return false;
    if (mayInterruptIfRunning) {
        if (!UNSAFE.compareAndSwapInt(this, stateOffset, NEW, INTERRUPTING))
            return false;
        Thread t = runner;
        if (t != null)
            t.interrupt();
        UNSAFE.putOrderedInt(this, stateOffset, INTERRUPTED); // final state
    }
    else if (!UNSAFE.compareAndSwapInt(this, stateOffset, NEW, CANCELLED))
        return false;
    finishCompletion();
    return true;
}

we can see that if mayInterruptIfRunning is false,cancel() just change state from NEW to CANCELLED and return false,nothing else will be done