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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 1.4.2_06) on Wed Oct 26 05:17:04 CEST 2005 --><TITLE>SimpleHashtable</TITLE><META NAME="keywords" CONTENT="util.SimpleHashtable class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="SimpleHashtable";}</SCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=3 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>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="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="../util/ResetableIterator.html" title="interface in util"><B>PREV CLASS</B></A> NEXT CLASS</FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../index.html" target="_top"><B>FRAMES</B></A> <A HREF="SimpleHashtable.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">util</FONT><BR>Class SimpleHashtable</H2><PRE>java.lang.Object <IMG SRC="../resources/inherit.gif" ALT="extended by"><B>util.SimpleHashtable</B></PRE><HR><DL><DT>public class <B>SimpleHashtable</B><DT>extends java.lang.Object</DL><P>This class provides a simple, open and unsynchronized hashtable, which implements the most important methods known from the <code>java.util.Hashtable</code> class. <p> Despite the more comprehensive functionality of the <code>java.util.Hashtable</code> the <code>SimpleHashtable</code> has also its advantages. It permits <cod>null</code> objects both as keys and values and provides more control of the dynamic memory allocation when increasing or decreasing its capacity of the internal <i>bucket</i> array. (See the description of the object constructors for more information.) The two default <code>ResetableIterator</code>s can be used to access the keys or values sequentially, without the instantiation of any new object, which is especially useful in <code>finalize</code> methods, where memory is short.<P><P><DL><DT><B>See Also:</B><DD><CODE>Hashtable</CODE></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Field Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../util/ResetableIterator.html" title="interface in util">ResetableIterator</A></CODE></FONT></TD><TD><CODE><B><A HREF="../util/SimpleHashtable.html#entryIterator">entryIterator</A></B></CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../util/ResetableIterator.html" title="interface in util">ResetableIterator</A></CODE></FONT></TD><TD><CODE><B><A HREF="../util/SimpleHashtable.html#keyIterator">keyIterator</A></B></CODE><BR> The hashtable's default iterator returning the key objects.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../util/ResetableIterator.html" title="interface in util">ResetableIterator</A></CODE></FONT></TD><TD><CODE><B><A HREF="../util/SimpleHashtable.html#valueIterator">valueIterator</A></B></CODE><BR> The hashtable's default iterator returning the value objects.</TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><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="../util/SimpleHashtable.html#SimpleHashtable()">SimpleHashtable</A></B>()</CODE><BR> Constructs a new <code>SimpleHashtable</code> object with the following default parameters: <code>minCapacity = 10</code>, <code>maxCapacity = Integer.MAX_VALUE</code>, <code>minLoadFactor = 0.0f</code>, <code>maxLoadFactor = 0.75f</code> and <code>capacityRate = 2.0f</code>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../util/SimpleHashtable.html#SimpleHashtable(int, float)">SimpleHashtable</A></B>(int minCapacity, float maxLoadFactor)</CODE><BR> Constructs a new <code>SimpleHashtable</code> object with the specified and following default parameters: <code>maxCapacity = Integer.MAX_VALUE</code>, <code>minLoadFactor = 0.0f</code> and <code>capacityRate = 2.0f</code>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../util/SimpleHashtable.html#SimpleHashtable(int, int, float, float, float)">SimpleHashtable</A></B>(int minCapacity, int maxCapacity, float minLoadFactor, float maxLoadFactor, float capacityRate)</CODE><BR> Constructs a new empty <code>SimpleHashtable</code> object with the specified parameters. </TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><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="../util/SimpleHashtable.html#clear()">clear</A></B>()</CODE><BR> Clears this hashtable by replacing the internal bucket arry with an empty new one of minimum capacity.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../util/SimpleHashtable.html#contains(java.lang.Object)">contains</A></B>(java.lang.Object value)</CODE><BR> Tests if the specified value is stored in this hashtable. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../util/SimpleHashtable.html#containsKey(java.lang.Object)">containsKey</A></B>(java.lang.Object key)</CODE><BR> Tests if the specified object is a key in this hashtable.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../util/SimpleHashtable.html#containsValue(java.lang.Object)">containsValue</A></B>(java.lang.Object value)</CODE><BR> Tests if the specified value is stored in this hashtable. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../util/ResetableIterator.html" title="interface in util">ResetableIterator</A></CODE></FONT></TD><TD><CODE><B><A HREF="../util/SimpleHashtable.html#entryIterator()">entryIterator</A></B>()</CODE><BR> </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="../util/SimpleHashtable.html#get(java.lang.Object)">get</A></B>(java.lang.Object key)</CODE><BR> Returns the value to which the specified key is mapped in this hashtable.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../util/SimpleHashtable.html#isEmpty()">isEmpty</A></B>()</CODE><BR> Tests if this hashtable stores any entries.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../util/ResetableIterator.html" title="interface in util">ResetableIterator</A></CODE></FONT></TD><TD><CODE><B><A HREF="../util/SimpleHashtable.html#keyIterator()">keyIterator</A></B>()</CODE><BR> Returns a new iterator of the hashtable keys, which is <i>not</i> fail-fast. </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="../util/SimpleHashtable.html#put(java.lang.Object, java.lang.Object)">put</A></B>(java.lang.Object key, java.lang.Object value)</CODE><BR> Maps the specified <code>key</code> to the specified <code>value</code> in this hashtable. </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="../util/SimpleHashtable.html#rehash(int)">rehash</A></B>(int capacity)</CODE><BR> Reorganizes the hashtable to use a new internal bucket array of the specified capacity. </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="../util/SimpleHashtable.html#remove(java.lang.Object)">remove</A></B>(java.lang.Object key)</CODE><BR> Removes the key (and its corresponding value) from this hashtable. </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="../util/SimpleHashtable.html#size()">size</A></B>()</CODE><BR> Returns the number of entries stored in this hashtable.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../util/ResetableIterator.html" title="interface in util">ResetableIterator</A></CODE></FONT></TD><TD><CODE><B><A HREF="../util/SimpleHashtable.html#valueIterator()">valueIterator</A></B>()</CODE><BR> Returns a new iterator of the hashtable values, which is <i>not</i> fail-fast. </TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class java.lang.Object</B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><A NAME="field_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Field Detail</B></FONT></TD></TR></TABLE><A NAME="keyIterator"><!-- --></A><H3>keyIterator</H3><PRE>public final <A HREF="../util/ResetableIterator.html" title="interface in util">ResetableIterator</A> <B>keyIterator</B></PRE><DL><DD>The hashtable's default iterator returning the key objects.<P><DL></DL></DL><HR><A NAME="valueIterator"><!-- --></A><H3>valueIterator</H3><PRE>public final <A HREF="../util/ResetableIterator.html" title="interface in util">ResetableIterator</A> <B>valueIterator</B></PRE><DL><DD>The hashtable's default iterator returning the value objects.<P><DL></DL></DL><HR><A NAME="entryIterator"><!-- --></A><H3>entryIterator</H3><PRE>public final <A HREF="../util/ResetableIterator.html" title="interface in util">ResetableIterator</A> <B>entryIterator</B></PRE><DL><DL></DL></DL><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2">⌨️ 快捷键说明
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