ecolban

/**
 * A BlockingQueue comes with an iterator() method which is more or less unusable because its hasNext()
 * method may return false before the last element has been placed on the queue. To indicate that the last
 * element has been put on the queue, we use the same trick used at some airports to indicate that the last 
 * piece of baggage has been placed on the baggage conveyor belt: A red suitcase marks the end.
 */
 
 public class MyClass implements Iterable<String> {
   
   private BlockingQueue<String> queue = new ArrayBlockingQueue<>(10);