Question

So if a program does this:

    static ArrayList<X> a = null;
    static{
            for(;;){X x = new X(); a.add(x)}
          }

and the only operations called after the static initializing, on the shared list, are get() and x.t()

       X x = a.get(i); x.t();

and X doesn’t have access to container & is thread safe, that should mean that using Arraylist like this, without synchronization is thread safe, correct?

Answer 1

If nothing is modifying the ArrayList than there is no reason that you should be worried about it’s thread-safety.

That static block is thread-safe by default, because it’s ran only once when the class is loaded (for initialization).