用于串口通讯测试的工具软件。完全使用java语言编写。

				/***********************************************************************
				 * Module:  Queue.java
				 * Author:  jzx
				 * Purpose: Defines the Class Queue
				 ***********************************************************************/
				
				package com.zcsoft.comm;
				
				import java.util.*;
				
				/** Title: 串口通信
				  * Description: 队列 
				  * Copyright: Copyright (c) 2002
				  * Company: Zhicheng Software&Service Co. Ltd.
				  *
				  * @author 蒋智湘
				  * @version 1.0 */
				public class Queue
				{
					/** 队列中的项 */
					private Vector entries;
					/** 终止其它线程从队列中取出项 */
					private boolean stop;
				
					public Queue()
					{
						entries = new Vector();
					}
				
					/** @param entry */
					public synchronized void put(Object entry)
					{
						entries.addElement(entry);
						notify();
					}
				
					public synchronized void stop()
					{
						stop  = true;
						notify();
					}
				
					public synchronized Object pull()
					{
						while(isEmpty() && !stop)
						{
							try
							{
								wait();
							}
							catch (InterruptedException ex){}
							if(stop == true)
							{
								return null;
							}
						}
						return get();
					}
				
					public synchronized Object get()
					{
						Object object = peek();
						if(object != null)
						{
							entries.removeElementAt(0);
						}
						return object;
					}
				
					public Object peek()
					{
						return isEmpty()?null:entries.elementAt(0);
					}
				
					public boolean isEmpty()
					{
						return entries.isEmpty();
					}
				
					public int size()
					{
						return entries.size();
					}
				
					/**
					 * 判断队列中是否存在同指定对象相等的成员
					 * @param entry
					 * @return 如果存在，则返回true，否则返回false
					 */
					public boolean exists(Object entry)
					{
						return this.entries.indexOf(entry) != -1;
					}
				
					/** 枚举队列中的所有成员 */
					public Enumeration elements()
					{
						return entries.elements();
					}
				
				}