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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.locks 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.locks 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" 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> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>软件包</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">类</FONT> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>使用</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>树</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>已过时</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-files/index-1.html"><FONT CLASS="NavBarFont1"><B>索引</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>帮助</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Standard Ed. 5.0</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 上一个 下一个</FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html@java_2Futil_2Fconcurrent_2Flocks_2Fpackage-use.html" target="_top"><B>框架</B></A> <A HREF="package-use.html" target="_top"><B>无框架</B></A> <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.locks<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.locks</A> 的软件包</FONT></TH></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。 </TD></TR></TABLE> <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="package-summary.html">java.util.concurrent.locks</A> 使用的 <A HREF="package-summary.html">java.util.concurrent.locks</A> 中的类</FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/AbstractQueuedSynchronizer.ConditionObject.html#java.util.concurrent.locks"><B>AbstractQueuedSynchronizer.ConditionObject</B></A></B><BR> <A HREF="AbstractQueuedSynchronizer.html" title="java.util.concurrent.locks 中的类"><CODE>AbstractQueuedSynchronizer</CODE></A> 的 Condition 实现是 <A HREF="Lock.html" title="java.util.concurrent.locks 中的接口"><CODE>Lock</CODE></A> 实现的基础。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/Condition.html#java.util.concurrent.locks"><B>Condition</B></A></B><BR> <tt>Condition</tt> 将 <tt>Object</tt> 监视器方法（<A HREF="../../../lang/Object.html#wait()"><CODE>wait</CODE></A>、<A HREF="../../../lang/Object.html#notify()"><CODE>notify</CODE></A> 和 <A HREF="../../../lang/Object.html#notifyAll()"><CODE>notifyAll</CODE></A>）分解成截然不同的对象，以便通过将这些对象与任意 <A HREF="Lock.html" title="java.util.concurrent.locks 中的接口"><CODE>Lock</CODE></A> 实现组合使用，为每个对象提供多个等待 set（wait-set）。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/Lock.html#java.util.concurrent.locks"><B>Lock</B></A></B><BR> <tt>Lock</tt> 实现提供了比使用 <tt>synchronized</tt> 方法和语句可获得的更广泛的锁定操作。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/ReadWriteLock.html#java.util.concurrent.locks"><B>ReadWriteLock</B></A></B><BR> <tt>ReadWriteLock</tt> 维护了一对相关的<A HREF="Lock.html" title="java.util.concurrent.locks 中的接口"><CODE>锁定</CODE></A>，一个用于只读操作，另一个用于写入操作。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/ReentrantReadWriteLock.html#java.util.concurrent.locks"><B>ReentrantReadWriteLock</B></A></B><BR> 支持与 <A HREF="ReentrantLock.html" title="java.util.concurrent.locks 中的类"><CODE>ReentrantLock</CODE></A> 类似语义的 <A HREF="ReadWriteLock.html" title="java.util.concurrent.locks 中的接口"><CODE>ReadWriteLock</CODE></A> 实现。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/ReentrantReadWriteLock.ReadLock.html#java.util.concurrent.locks"><B>ReentrantReadWriteLock.ReadLock</B></A></B><BR> <A HREF="ReentrantReadWriteLock.html#readLock()"><CODE>ReentrantReadWriteLock.readLock()</CODE></A> 方法返回的锁定。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/ReentrantReadWriteLock.WriteLock.html#java.util.concurrent.locks"><B>ReentrantReadWriteLock.WriteLock</B></A></B><BR> <A HREF="ReentrantReadWriteLock.html#writeLock()"><CODE>ReentrantReadWriteLock.writeLock()</CODE></A> 方法返回的锁定。</TD></TR></TABLE> <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> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>软件包</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">类</FONT> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>使用</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>树</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>已过时</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-files/index-1.html"><FONT CLASS="NavBarFont1"><B>索引</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>帮助</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Standard Ed. 5.0</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 上一个 下一个</FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A 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