public class StackUser extends Thread
{
  StackDemo stackDemo;

  public StackUser(StackDemo _stackDemo)
  {
    stackDemo = _stackDemo;
  }

  public void run()
  {
    try
    {
      while (true)
      {
        int k = stackDemo.pop();
        System.out.println("removed " + k + " from the stack");
        sleep(2000);
      }
    }
    catch (InterruptedException ie)
    {}
  }

}