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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Fri Dec 06 19:57:10 CET 2002 --><TITLE>jakarta-turbine-2 2.2 API: Class SequencedHashtable</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/SequencedHashtable.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../org/apache/turbine/util/SecurityCheck.html"><B>PREV CLASS</B></A> <A HREF="../../../../org/apache/turbine/util/ServerData.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="SequencedHashtable.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.apache.turbine.util</FONT><BR>Class SequencedHashtable</H2><PRE>java.lang.Object | +--java.util.Dictionary | +--java.util.Hashtable | +--<B>org.apache.turbine.util.SequencedHashtable</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>java.lang.Cloneable, java.util.Map, java.io.Serializable</DD></DL><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../org/apache/turbine/util/BufferCache.html">BufferCache</A></DD></DL><HR><DL><DT>public class <B>SequencedHashtable</B><DT>extends java.util.Hashtable</DL><P>A <CODE>Hashtable</CODE> whose keys are sequenced. The sequencing of the keys allow easy access to the values in the order which they were added in. This class is thread safe. <p> Implementing the List interface is not possible due to a instance method name clash between the Collection and the List interface: <table> <tr><td>Collections</td><td>boolean remove(Object o)</td></tr> <tr><td>Lists</td><td>Object remove(Object o)</td></tr> </table> So one cannot implement both interfaces at the same, which is unfortunate because the List interface would be very nice in conjuction with Velocity. <p> A slightly more complex implementation and interface could involve the use of a list of <code>Map.Entry</code> objects.<P><DL><DT><B>Version: </B><DD>$Id: SequencedHashtable.java,v 1.1.1.1 2001/08/16 05:09:41 jvanzyl Exp $</DD><DT><B>Author: </B><DD><a href="mailto:dlr@collab.net">Daniel Rall</a></DD><DT><B>See Also: </B><DD><A HREF="../../../../serialized-form.html#org.apache.turbine.util.SequencedHashtable">Serialized Form</A></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><A NAME="inner_classes_inherited_from_class_java.util.Map"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Inner classes inherited from class java.util.Map</B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>java.util.Map.Entry</CODE></TD></TR></TABLE> <!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#SequencedHashtable()">SequencedHashtable</A></B>()</CODE><BR> Creates a new instance with default storage.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#SequencedHashtable(int)">SequencedHashtable</A></B>(int size)</CODE><BR> Creates a new instance with the specified storage.</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#clear()">clear</A></B>()</CODE><BR> Clears all elements.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Object</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#clone()">clone</A></B>()</CODE><BR> Creates a shallow copy of this object, preserving the internal structure by copying only references.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#freshenSequence(java.lang.Object, java.lang.Object)">freshenSequence</A></B>(java.lang.Object key, java.lang.Object value)</CODE><BR> Freshens the sequence of the element <code>value</code> if <code>value</code> is not <code>null</code>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Object</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#get(int)">get</A></B>(int index)</CODE><BR> Returns the key at the specified index.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Object</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#getValue(int)">getValue</A></B>(int index)</CODE><BR> Returns the value at the specified index.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#indexOf(java.lang.Object)">indexOf</A></B>(java.lang.Object key)</CODE><BR> Returns the index of the specified key.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.util.Iterator</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#iterator()">iterator</A></B>()</CODE><BR> Returns a key iterator.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#lastIndexOf(java.lang.Object)">lastIndexOf</A></B>(java.lang.Object key)</CODE><BR> Returns the last index of the specified key.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Object</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#put(java.lang.Object, java.lang.Object)">put</A></B>(java.lang.Object key, java.lang.Object value)</CODE><BR> Stores the provided key/value pair.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#putAll(java.util.Map)">putAll</A></B>(java.util.Map t)</CODE><BR> Stores the provided key/value pairs.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Object</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#remove(int)">remove</A></B>(int index)</CODE><BR> Removes the element at the specified index.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Object</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#remove(java.lang.Object)">remove</A></B>(java.lang.Object key)</CODE><BR> Removes the element with the specified key.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.util.List</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#sequence()">sequence</A></B>()</CODE><BR> Returns the ordered sequence of keys.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.util.Collection</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/apache/turbine/util/SequencedHashtable.html#values()">values</A></B>()</CODE><BR> Slightly cheaper implementation of <code>values()</code> method.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.util.Hashtable"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class java.util.Hashtable</B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>contains, containsKey, containsValue, elements, entrySet, equals, get, hashCode, isEmpty, keys, keySet, rehash, size, toString</CODE></TD></TR>⌨️ 快捷键说明
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