Java並行処理プログラミング--follow-up

//某社の入社試験問題
//このプログラムは何をプリントしますか？
public class Initializer{
  private static boolean initialized = false;

  static{
    Thread t = new Thread(new Runnable(){
      public void run(){
        initialized = true;
      }
    });
    t.start();

    try{
      t.join();
    }
    catch (InterruptedException e){
      throw new AssertionError(e);
    }
  }

  public static void main(String[] args){
    System.out.println(initialized);
  }
}

    public Iterator iterator() {
        return new COWIterator(getArray(), 0);
    }
    ---------
    private static class COWIterator implements ListIterator {
        /** Snapshot of the array **/
        private final Object[] snapshot;
        /** Index of element to be returned by subsequent call to next.  */
        private int cursor;

        private COWIterator(Object[] elements, int initialCursor) {
            cursor = initialCursor;
            snapshot = elements;
        }

public class DistributionSet extends CopyOnWriteArraySet{
  private Iterator i;

  public void enqueue(Object message){
    for (i = this.iterator(); i.hasNext(); ){
      EventListener listener = (EventListener)i.next();
      listener.eventObserved(message) ;
    }
  }

  public  boolean add(EventListener consumer){
    super.add(consumer);
    return true;  
  }
}