!7

static new AtomicLong ended;

p {
  new L<Thread> threads;
  repeat with ms sleep 1 {
    threads.add(startThread(r { incAtomicLong(ended) }));
    print("Number of Thread objects: " + l(threads) + ". Not ended: " + (l(threads)-ended.longValue()) + ". Number of threads: " + numberOfAllThreads());
  }
}