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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 09:53:17 CST 2005 --><META http-equiv="Content-Type" content="text/html; charset=gb2312"><TITLE>软件包 java.util.prefs 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.prefs 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 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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_2Fprefs_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.prefs<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.prefs</A> 的软件包</FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><A HREF="#java.util.prefs"><B>java.util.prefs</B></A></TD><TD>此包允许应用程序存储并检索用户和系统首选项和配置数据。&nbsp;</TD></TR></TABLE>&nbsp;<P><A NAME="java.util.prefs"><!-- --></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.prefs</A> 使用的 <A HREF="package-summary.html">java.util.prefs</A> 中的类</FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/AbstractPreferences.html#java.util.prefs"><B>AbstractPreferences</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;此类提供了 <A HREF="Preferences.html" title="java.util.prefs 中的类"><CODE>Preferences</CODE></A> 类的骨干实现,从而大大简化了实现此类的任务。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/BackingStoreException.html#java.util.prefs"><B>BackingStoreException</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;抛出该异常表明由于内部存储故障或者不能联系内部存储而无法完成 preferences 操作。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/InvalidPreferencesFormatException.html#java.util.prefs"><B>InvalidPreferencesFormatException</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;抛出此异常表明根据 <A HREF="Preferences.html" title="java.util.prefs 中的类"><CODE>Preferences</CODE></A> 规范,输入内容不符合 preferences 集合的正确 XML 文档类型,从而无法完成操作。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/NodeChangeEvent.html#java.util.prefs"><B>NodeChangeEvent</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<tt>Preferences</tt> 节点发出的事件,用于指示已添加或移除该节点的子节点。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/NodeChangeListener.html#java.util.prefs"><B>NodeChangeListener</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;用于接收首选项节点更改事件的侦听器。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/PreferenceChangeEvent.html#java.util.prefs"><B>PreferenceChangeEvent</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<tt>Preferences</tt> 节点发出的事件,用于指示已经添加或移除首选项,或者首选项的值已被更改。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/PreferenceChangeListener.html#java.util.prefs"><B>PreferenceChangeListener</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;用于接收首选项节点更改事件的侦听器。</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><B><A HREF="class-use/Preferences.html#java.util.prefs"><B>Preferences</B></A></B><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;首选项数据的层次结构 collection 中的节点。</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 CLASS="NavBarFont1">类</FONT>&nbsp;</TD>  <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> &nbsp;<FONT CLASS="NavBarFont1Rev"><B>使用</B></FONT>&nbsp;</TD>  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>树</B></FONT></A>&nbsp;</TD>  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>已过时</B></FONT></A>&nbsp;</TD>  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../index-files/index-1.html"><FONT CLASS="NavBarFont1"><B>索引</B></FONT></A>&nbsp;</TD>  <TD BGCOLOR="#EEEEFF" 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_2Fprefs_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 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