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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_03) on Mon Jun 07 16:42:22 BST 2004 --><TITLE>AbstractDataset (JFreeChart Class Library (version 0.9.20))</TITLE><META NAME="keywords" CONTENT="org.jfree.data.AbstractDataset class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="AbstractDataset (JFreeChart Class Library (version 0.9.20))";}</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"> PREV CLASS <A HREF="../../../org/jfree/data/AbstractIntervalXYDataset.html" title="class in org.jfree.data"><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="AbstractDataset.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 | 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><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.jfree.data</FONT><BR>Class AbstractDataset</H2><PRE>java.lang.Object <IMG SRC="../../../resources/inherit.gif" ALT="extended by"><B>org.jfree.data.AbstractDataset</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>java.lang.Cloneable, <A HREF="../../../org/jfree/data/Dataset.html" title="interface in org.jfree.data">Dataset</A>, java.io.ObjectInputValidation, java.io.Serializable</DD></DL><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../org/jfree/data/AbstractSeriesDataset.html" title="class in org.jfree.data">AbstractSeriesDataset</A>, <A HREF="../../../org/jfree/data/CategoryToPieDataset.html" title="class in org.jfree.data">CategoryToPieDataset</A>, <A HREF="../../../org/jfree/data/statistics/DefaultBoxAndWhiskerCategoryDataset.html" title="class in org.jfree.data.statistics">DefaultBoxAndWhiskerCategoryDataset</A>, <A HREF="../../../org/jfree/data/DefaultCategoryDataset.html" title="class in org.jfree.data">DefaultCategoryDataset</A>, <A HREF="../../../org/jfree/data/DefaultKeyedValueDataset.html" title="class in org.jfree.data">DefaultKeyedValueDataset</A>, <A HREF="../../../org/jfree/data/DefaultMeterDataset.html" title="class in org.jfree.data">DefaultMeterDataset</A>, <A HREF="../../../org/jfree/data/DefaultPieDataset.html" title="class in org.jfree.data">DefaultPieDataset</A>, <A HREF="../../../org/jfree/data/statistics/DefaultStatisticalCategoryDataset.html" title="class in org.jfree.data.statistics">DefaultStatisticalCategoryDataset</A>, <A HREF="../../../org/jfree/data/DefaultValueDataset.html" title="class in org.jfree.data">DefaultValueDataset</A>, <A HREF="../../../org/jfree/data/WaferMapDataset.html" title="class in org.jfree.data">WaferMapDataset</A></DD></DL><HR><DL><DT>public abstract class <B>AbstractDataset</B><DT>extends java.lang.Object<DT>implements <A HREF="../../../org/jfree/data/Dataset.html" title="interface in org.jfree.data">Dataset</A>, java.lang.Cloneable, java.io.Serializable, java.io.ObjectInputValidation</DL><P>An abstract implementation of the <A HREF="../../../org/jfree/data/Dataset.html" title="interface in org.jfree.data"><CODE>Dataset</CODE></A> interface, containing a mechanism for registering change listeners.<P><P><DL><DT><B>See Also:</B><DD><A HREF="../../../serialized-form.html#org.jfree.data.AbstractDataset">Serialized Form</A></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== 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 ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected </CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/AbstractDataset.html#AbstractDataset()">AbstractDataset</A></B>()</CODE><BR> Constructs a dataset.</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="../../../org/jfree/data/AbstractDataset.html#addChangeListener(org.jfree.data.DatasetChangeListener)">addChangeListener</A></B>(<A HREF="../../../org/jfree/data/DatasetChangeListener.html" title="interface in org.jfree.data">DatasetChangeListener</A> listener)</CODE><BR> Registers an object to receive notification of changes to the dataset.</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/jfree/data/AbstractDataset.html#clone()">clone</A></B>()</CODE><BR> Returns a clone of the dataset.</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/jfree/data/AbstractDataset.html#fireDatasetChanged()">fireDatasetChanged</A></B>()</CODE><BR> Notifies all registered listeners that the dataset has changed.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../org/jfree/data/DatasetGroup.html" title="class in org.jfree.data">DatasetGroup</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/data/AbstractDataset.html#getGroup()">getGroup</A></B>()</CODE><BR> Returns the dataset group for the dataset.</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/jfree/data/AbstractDataset.html#notifyListeners(org.jfree.data.DatasetChangeEvent)">notifyListeners</A></B>(<A HREF="../../../org/jfree/data/DatasetChangeEvent.html" title="class in org.jfree.data">DatasetChangeEvent</A> event)</CODE><BR> Notifies all registered listeners that the dataset has changed.</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/jfree/data/AbstractDataset.html#removeChangeListener(org.jfree.data.DatasetChangeListener)">removeChangeListener</A></B>(<A HREF="../../../org/jfree/data/DatasetChangeListener.html" title="interface in org.jfree.data">DatasetChangeListener</A> listener)</CODE><BR> Deregisters an object so that it no longer receives notification of changes to the dataset.</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/jfree/data/AbstractDataset.html#setGroup(org.jfree.data.DatasetGroup)">setGroup</A></B>(<A HREF="../../../org/jfree/data/DatasetGroup.html" title="class in org.jfree.data">DatasetGroup</A> group)</CODE><BR> Sets the dataset group for the dataset.</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/jfree/data/AbstractDataset.html#validateObject()">validateObject</A></B>()</CODE><BR> Validates the object.</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>equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><!-- ========= 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"><B>Constructor Detail</B></FONT></TD></TR></TABLE>⌨️ 快捷键说明
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