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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.5.0_03) on Wed Nov 02 09:53:16 CST 2005 --><META http-equiv="Content-Type" content="text/html; charset=gb2312"><TITLE>软件包 java.util.concurrent 的使用 (Java 2 Platform SE 5.0)</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){    parent.document.title="软件包 java.util.concurrent 的使用 (Java 2 Platform SE 5.0)";}</SCRIPT><NOSCRIPT></NOSCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="跳过导航链接"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" 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CLASS="NavBarCell1">    <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>帮助</B></FONT></A>&nbsp;</TD>  </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Java<sup><font size=-2>TM</font></sup>&nbsp;2&nbsp;Platform<br>Standard&nbsp;Ed. 5.0</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">&nbsp;上一个&nbsp;&nbsp;下一个</FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">  <A HREF="../../../index.html@java_2Futil_2Fconcurrent_2Fpackage-use.html" target="_top"><B>框架</B></A>  &nbsp;&nbsp;<A HREF="package-use.html" target="_top"><B>无框架</B></A>  &nbsp;&nbsp;<SCRIPT type="text/javascript">  <!--  if(window==top) {    document.writeln('<A HREF="../../../allclasses-noframe.html"><B>所有类</B></A>');  }  //--></SCRIPT><NOSCRIPT>  <A HREF="../../../allclasses-noframe.html"><B>所有类</B></A></NOSCRIPT></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><CENTER><H2><B>软件包 java.util.concurrent<br>的使用</B></H2></CENTER><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">使用 <A HREF="package-summary.html">java.util.concurrent</A> 的软件包</FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><A HREF="#java.util.concurrent"><B>java.util.concurrent</B></A></TD><TD> 在并发编程中很常用的实用工具类。&nbsp;</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><A HREF="#java.util.concurrent.locks"><B>java.util.concurrent.locks</B></A></TD><TD>为锁定和等待条件提供一个框架的接口和类,它不同于内置同步和监视器。&nbsp;</TD></TR></TABLE>&nbsp;<P><A NAME="java.util.concurrent"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><A HREF="package-summary.html">java.util.concurrent</A> 使用的 <A HREF="package-summary.html">java.util.concurrent</A> 中的类</FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/AbstractExecutorService.html#java.util.concurrent"><B>AbstractExecutorService</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;提供 <A HREF="ExecutorService.html" title="java.util.concurrent 中的接口"><CODE>ExecutorService</CODE></A> 执行方法的默认实现。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/BlockingQueue.html#java.util.concurrent"><B>BlockingQueue</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;支持两个附加操作的 <A HREF="../Queue.html" title="java.util 中的接口"><CODE>Queue</CODE></A>,这两个操作是:检索元素时等待队列变为非空,以及存储元素时等待空间变得可用。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/BrokenBarrierException.html#java.util.concurrent"><B>BrokenBarrierException</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;当某个线程试图等待处于断开状态的 barrier 时,或者 barrier 进入断开状态而线程处于等待状态时,抛出该异常。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/Callable.html#java.util.concurrent"><B>Callable</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;返回结果并且可能抛出异常的任务。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/CompletionService.html#java.util.concurrent"><B>CompletionService</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;将生产新的异步任务与使用已完成任务的结果分离开来的服务。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/ConcurrentMap.html#java.util.concurrent"><B>ConcurrentMap</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;提供其他原子 <tt>putIfAbsent</tt>、<tt>remove</tt>、<tt>replace</tt> 方法的 <A HREF="../Map.html" title="java.util 中的接口"><CODE>Map</CODE></A>。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/Delayed.html#java.util.concurrent"><B>Delayed</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;一种混合风格的接口,用来标记那些应该在给定延迟时间之后执行的对象。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/ExecutionException.html#java.util.concurrent"><B>ExecutionException</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;当试图检索已通过抛出异常而中止的任务的结果时,抛出此异常。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/Executor.html#java.util.concurrent"><B>Executor</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;执行已提交的 <A HREF="../../lang/Runnable.html" title="java.lang 中的接口"><CODE>Runnable</CODE></A> 任务的对象。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/ExecutorService.html#java.util.concurrent"><B>ExecutorService</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<A HREF="Executor.html" title="java.util.concurrent 中的接口"><CODE>Executor</CODE></A> 提供了管理终止的方法,以及可为跟踪一个或多个异步任务执行状况而生成 <A HREF="Future.html" title="java.util.concurrent 中的接口"><CODE>Future</CODE></A> 的方法。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/Future.html#java.util.concurrent"><B>Future</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<tt>Future</tt> 表示异步计算的结果。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/RejectedExecutionHandler.html#java.util.concurrent"><B>RejectedExecutionHandler</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;无法由 <A HREF="ThreadPoolExecutor.html" title="java.util.concurrent 中的类"><CODE>ThreadPoolExecutor</CODE></A> 执行的任务的处理程序。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/ScheduledExecutorService.html#java.util.concurrent"><B>ScheduledExecutorService</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;一个 <A HREF="ExecutorService.html" title="java.util.concurrent 中的接口"><CODE>ExecutorService</CODE></A>,可安排在给定的延迟后运行或定期执行的命令。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/ScheduledFuture.html#java.util.concurrent"><B>ScheduledFuture</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;一个延迟的、结果可接受的操作,可将其取消。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/ThreadFactory.html#java.util.concurrent"><B>ThreadFactory</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;根据需要创建新线程的对象。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/ThreadPoolExecutor.html#java.util.concurrent"><B>ThreadPoolExecutor</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;一个 <A HREF="ExecutorService.html" title="java.util.concurrent 中的接口"><CODE>ExecutorService</CODE></A>,它使用可能的几个池线程之一执行每个提交的任务,通常使用 <A HREF="Executors.html" title="java.util.concurrent 中的类"><CODE>Executors</CODE></A> 工厂方法配置。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/TimeoutException.html#java.util.concurrent"><B>TimeoutException</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;阻塞操作超时时,抛出该异常。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/TimeUnit.html#java.util.concurrent"><B>TimeUnit</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<tt>TimeUnit</tt> 表示给定单元粒度的时间段,它提供在这些单元中进行跨单元转换和执行计时及延迟操作的实用工具方法。</TD></TR></TABLE>&nbsp;<P><A NAME="java.util.concurrent.locks"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><A HREF="locks/package-summary.html">java.util.concurrent.locks</A> 使用的 <A HREF="package-summary.html">java.util.concurrent</A> 中的类</FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/TimeUnit.html#java.util.concurrent.locks"><B>TimeUnit</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<tt>TimeUnit</tt> 表示给定单元粒度的时间段,它提供在这些单元中进行跨单元转换和执行计时及延迟操作的实用工具方法。</TD></TR></TABLE>&nbsp;<P><HR><!-- ======= START OF BOTTOM NAVBAR ====== --><A NAME="navbar_bottom"><!-- --></A><A HREF="#skip-navbar_bottom" title="跳过导航链接"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY="">  <TR ALIGN="center" VALIGN="top">  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>概述</B></FONT></A>&nbsp;</TD>  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>软件包</B></FONT></A>&nbsp;</TD>  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <FONT 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