code: @Deprecated
      public synchronized void interruptAll() {
          for (Iterator it = threads_.values().iterator(); it.hasNext();) {
              Thread t = (Thread) (it.next());
              t.interrupt();
          }
      }
docs: Interrupt all threads in the pool, causing them all to
  terminate. Assuming that executed tasks do not disable (clear)
  interruptions, each thread will terminate after processing its
  current task. Threads will terminate sooner if the executed tasks
  themselves respond to interrupts.
  
  @deprecated