/* * 基于双向链表实现双端队列结构 */ package dsa; public class Deque_DLNode implements Deque { protected DLNode header;//指向头节点(哨兵) protected DLNode trailer;//指向尾节点(哨兵) protected int size;//队列中元素的数目 //构造函数 public Deque_DLNode() { header = new DLNode(); trailer = new DLNode(); header.setNext(trailer)