FairQueue implements BlockingQueue<E> { @Override public boolean removeAll (Collection<?> c) { boolean modified = false; for (Object o : c) { boolean res = remove (o); modified = modified || res; } return modified; } FairQueue(); @Override int size(); @Override int remainingCapacity(); @Override void put(E e); @Override boolean offer(E e); @Override boolean offer(E e, long timeout, TimeUnit unit); @Override E take(); @Override E peek(); @Override E poll(); @Override E poll(long timeout, TimeUnit unit); @Override int drainTo(Collection<? super E> c); @Override int drainTo(Collection<? super E> c, int maxElements); @Override void clear(); @Override boolean contains(Object o); @Override Object[] toArray(); @Override T[] toArray(T[] a); @Override Iterator<E> iterator(); @Override E remove(); @Override E element(); @Override boolean isEmpty(); @Override boolean containsAll(Collection<?> c); @Override boolean addAll(Collection<? extends E> c); @Override boolean removeAll(Collection<?> c); @Override boolean retainAll(Collection<?> c); @Override boolean add(E e); @Override boolean remove(Object o);  }
@Test public void testRemoveAll () { ArrayList<FairQueueTestString> list = new ArrayList<FairQueueTestString> (); list.add (new FairQueueTestString ("key1", "item1")); list.add (new FairQueueTestString ("key1", "item2")); list.add (new FairQueueTestString ("key1", "item7")); list.add (new FairQueueTestString ("key2", "item4")); list.add (new FairQueueTestString ("key2", "item5")); queue.offer (new FairQueueTestString ("key1", "item1")); queue.offer (new FairQueueTestString ("key1", "item2")); queue.offer (new FairQueueTestString ("key1", "item3")); queue.offer (new FairQueueTestString ("key2", "item4")); queue.offer (new FairQueueTestString ("key2", "item5")); Assert.assertEquals (queue.size (), 5); Assert.assertEquals (queue.removeAll (list), true); Assert.assertEquals (queue.size (), 1); ArrayList<FairQueueTestString> list2 = new ArrayList<FairQueueTestString> (); list2.add (new FairQueueTestString ("key2", "item5")); Assert.assertEquals (queue.removeAll (list2), false); }