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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 16:42:30 BST 2004 --><TITLE>Plot (JFreeChart Class Library (version 0.9.20))</TITLE><META NAME="keywords" CONTENT="org.jfree.chart.plot.Plot class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="Plot (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"> <A HREF="../../../../org/jfree/chart/plot/PiePlotState.html" title="class in org.jfree.chart.plot"><B>PREV CLASS</B></A> <A HREF="../../../../org/jfree/chart/plot/PlotOrientation.html" title="class in org.jfree.chart.plot"><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="Plot.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">org.jfree.chart.plot</FONT><BR>Class Plot</H2><PRE>java.lang.Object <IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><B>org.jfree.chart.plot.Plot</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../org/jfree/chart/event/AxisChangeListener.html" title="interface in org.jfree.chart.event">AxisChangeListener</A>, java.lang.Cloneable, <A HREF="../../../../org/jfree/data/DatasetChangeListener.html" title="interface in org.jfree.data">DatasetChangeListener</A>, java.util.EventListener, java.io.Serializable</DD></DL><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../org/jfree/chart/plot/CategoryPlot.html" title="class in org.jfree.chart.plot">CategoryPlot</A>, <A HREF="../../../../org/jfree/chart/plot/CompassPlot.html" title="class in org.jfree.chart.plot">CompassPlot</A>, <A HREF="../../../../org/jfree/chart/plot/ContourPlot.html" title="class in org.jfree.chart.plot">ContourPlot</A>, <A HREF="../../../../org/jfree/chart/plot/FastScatterPlot.html" title="class in org.jfree.chart.plot">FastScatterPlot</A>, <A HREF="../../../../org/jfree/chart/plot/MeterPlot.html" title="class in org.jfree.chart.plot">MeterPlot</A>, <A HREF="../../../../org/jfree/chart/plot/MultiplePiePlot.html" title="class in org.jfree.chart.plot">MultiplePiePlot</A>, <A HREF="../../../../org/jfree/chart/plot/PiePlot.html" title="class in org.jfree.chart.plot">PiePlot</A>, <A HREF="../../../../org/jfree/chart/plot/PolarPlot.html" title="class in org.jfree.chart.plot">PolarPlot</A>, <A HREF="../../../../org/jfree/chart/plot/ThermometerPlot.html" title="class in org.jfree.chart.plot">ThermometerPlot</A>, <A HREF="../../../../org/jfree/chart/plot/WaferMapPlot.html" title="class in org.jfree.chart.plot">WaferMapPlot</A>, <A HREF="../../../../org/jfree/chart/plot/XYPlot.html" title="class in org.jfree.chart.plot">XYPlot</A></DD></DL><HR><DL><DT>public abstract class <B>Plot</B><DT>extends java.lang.Object<DT>implements <A HREF="../../../../org/jfree/chart/event/AxisChangeListener.html" title="interface in org.jfree.chart.event">AxisChangeListener</A>, <A HREF="../../../../org/jfree/data/DatasetChangeListener.html" title="interface in org.jfree.data">DatasetChangeListener</A>, java.io.Serializable, java.lang.Cloneable</DL><P>The base class for all plots in JFreeChart. The <A HREF="../../../../org/jfree/chart/JFreeChart.html" title="class in org.jfree.chart"><CODE>JFreeChart</CODE></A> class delegates the drawing of axes and data to the plot. This base class provides facilities common to most plot types.<P><P><DL><DT><B>See Also:</B><DD><A HREF="../../../../serialized-form.html#org.jfree.chart.plot.Plot">Serialized Form</A></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>static float</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#DEFAULT_BACKGROUND_ALPHA">DEFAULT_BACKGROUND_ALPHA</A></B></CODE><BR> The default background alpha transparency.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static java.awt.Paint</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#DEFAULT_BACKGROUND_PAINT">DEFAULT_BACKGROUND_PAINT</A></B></CODE><BR> The default background color.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static float</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#DEFAULT_FOREGROUND_ALPHA">DEFAULT_FOREGROUND_ALPHA</A></B></CODE><BR> The default foreground alpha transparency.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static java.awt.Insets</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#DEFAULT_INSETS">DEFAULT_INSETS</A></B></CODE><BR> The default insets.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static java.awt.Paint</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#DEFAULT_OUTLINE_PAINT">DEFAULT_OUTLINE_PAINT</A></B></CODE><BR> The default outline color.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static java.awt.Stroke</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#DEFAULT_OUTLINE_STROKE">DEFAULT_OUTLINE_STROKE</A></B></CODE><BR> The default outline stroke.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#MINIMUM_HEIGHT_TO_DRAW">MINIMUM_HEIGHT_TO_DRAW</A></B></CODE><BR> The minimum height at which the plot should be drawn.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#MINIMUM_WIDTH_TO_DRAW">MINIMUM_WIDTH_TO_DRAW</A></B></CODE><BR> The minimum width at which the plot should be drawn.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static java.lang.Number</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#ZERO">ZERO</A></B></CODE><BR> Useful constant representing zero.</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 ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected </CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#Plot()">Plot</A></B>()</CODE><BR> Creates a new plot.</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/chart/plot/Plot.html#addChangeListener(org.jfree.chart.event.PlotChangeListener)">addChangeListener</A></B>(<A HREF="../../../../org/jfree/chart/event/PlotChangeListener.html" title="interface in org.jfree.chart.event">PlotChangeListener</A> listener)</CODE><BR> Registers an object for notification of changes to the plot.</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/chart/plot/Plot.html#axisChanged(org.jfree.chart.event.AxisChangeEvent)">axisChanged</A></B>(<A HREF="../../../../org/jfree/chart/event/AxisChangeEvent.html" title="class in org.jfree.chart.event">AxisChangeEvent</A> event)</CODE><BR> Receives notification of a change to one of the plot's axes.</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/chart/plot/Plot.html#clone()">clone</A></B>()</CODE><BR> Creates a clone of the plot.</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/chart/plot/Plot.html#datasetChanged(org.jfree.data.DatasetChangeEvent)">datasetChanged</A></B>(<A HREF="../../../../org/jfree/data/DatasetChangeEvent.html" title="class in org.jfree.data">DatasetChangeEvent</A> event)</CODE><BR> Receives notification of a change to the plot's dataset.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>abstract void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#draw(java.awt.Graphics2D, java.awt.geom.Rectangle2D, org.jfree.chart.plot.PlotState, org.jfree.chart.plot.PlotRenderingInfo)">draw</A></B>(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D plotArea, <A HREF="../../../../org/jfree/chart/plot/PlotState.html" title="class in org.jfree.chart.plot">PlotState</A> parentState, <A HREF="../../../../org/jfree/chart/plot/PlotRenderingInfo.html" title="class in org.jfree.chart.plot">PlotRenderingInfo</A> info)</CODE><BR> Draws the plot on a Java 2D graphics device (such as the screen or a printer).</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/chart/plot/Plot.html#draw(java.awt.Graphics2D, java.awt.geom.Rectangle2D, java.awt.geom.Point2D, org.jfree.chart.plot.PlotState, org.jfree.chart.plot.PlotRenderingInfo)">draw</A></B>(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D area, java.awt.geom.Point2D anchor, <A HREF="../../../../org/jfree/chart/plot/PlotState.html" title="class in org.jfree.chart.plot">PlotState</A> parentState, <A HREF="../../../../org/jfree/chart/plot/PlotRenderingInfo.html" title="class in org.jfree.chart.plot">PlotRenderingInfo</A> info)</CODE><BR> Implement later to make use of anchor.</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/chart/plot/Plot.html#drawBackground(java.awt.Graphics2D, java.awt.geom.Rectangle2D)">drawBackground</A></B>(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D area)</CODE><BR> Draws the plot background (the background color and/or image).</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/chart/plot/Plot.html#drawBackgroundImage(java.awt.Graphics2D, java.awt.geom.Rectangle2D)">drawBackgroundImage</A></B>(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D area)</CODE><BR> Draws the background image (if there is one) aligned within the specified area.</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/chart/plot/Plot.html#drawNoDataMessage(java.awt.Graphics2D, java.awt.geom.Rectangle2D)">drawNoDataMessage</A></B>(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D area)</CODE><BR> Draws a message to state that there is no data to plot.</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/chart/plot/Plot.html#drawOutline(java.awt.Graphics2D, java.awt.geom.Rectangle2D)">drawOutline</A></B>(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D area)</CODE><BR> Draws the plot outline.</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="../../../../org/jfree/chart/plot/Plot.html#equals(java.lang.Object)">equals</A></B>(java.lang.Object obj)</CODE><BR> Tests this plot for equality with another object.</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/chart/plot/Plot.html#fillBackground(java.awt.Graphics2D, java.awt.geom.Rectangle2D)">fillBackground</A></B>(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D area)</CODE><BR> Fills the specified area with the background paint.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> float</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#getBackgroundAlpha()">getBackgroundAlpha</A></B>()</CODE>⌨️ 快捷键说明
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