| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package java.util; |
| |
| /** |
| * A collection designed for holding elements prior to processing. <a |
| * href="http://docs.oracle.com/javase/6/docs/api/java/util/Deque.html">Deque</a> |
| * |
| * @param <E> element type. |
| */ |
| public interface Deque<E> extends Queue<E> { |
| |
| void addFirst(E e); |
| |
| void addLast(E e); |
| |
| Iterator<E> descendingIterator(); |
| |
| E getFirst(); |
| |
| E getLast(); |
| |
| boolean offerFirst(E e); |
| |
| boolean offerLast(E e); |
| |
| E peekFirst(); |
| |
| E peekLast(); |
| |
| E pollFirst(); |
| |
| E pollLast(); |
| |
| E pop(); |
| |
| void push(E e); |
| |
| E removeFirst(); |
| |
| boolean removeFirstOccurrence(Object o); |
| |
| E removeLast(); |
| |
| boolean removeLastOccurrence(Object o); |
| |
| } |