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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Thu Sep 11 11:26:58 BST 2003 --><TITLE>Plot (JFreeChart Class Library (version 0.9.12))</TITLE><META NAME="keywords" CONTENT="org.jfree.chart.plot.Plot,Plot class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"></HEAD><SCRIPT>function asd(){parent.document.title="Plot (JFreeChart Class Library (version 0.9.12))";}</SCRIPT><BODY BGCOLOR="white" onload="asd();"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=3 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="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/PiePlot.html"><B>PREV CLASS</B></A> <A HREF="../../../../org/jfree/chart/plot/PlotOrientation.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="Plot.html" TARGET="_top"><B>NO FRAMES</B></A> <SCRIPT> <!-- if(window==top) { document.writeln('<A HREF="../../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT><A HREF="../../../../allclasses-noframe.html" TARGET=""><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><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.jfree.chart.plot</FONT><BR>Class Plot</H2><PRE>java.lang.Object | +--<B>org.jfree.chart.plot.Plot</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../org/jfree/chart/event/AxisChangeListener.html">AxisChangeListener</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html">AxisConstants</A>, <A HREF="../../../../org/jfree/data/DatasetChangeListener.html">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">CategoryPlot</A>, <A HREF="../../../../org/jfree/chart/plot/CompassPlot.html">CompassPlot</A>, <A HREF="../../../../org/jfree/chart/plot/ContourPlot.html">ContourPlot</A>, <A HREF="../../../../org/jfree/chart/plot/FastScatterPlot.html">FastScatterPlot</A>, <A HREF="../../../../org/jfree/chart/plot/MeterPlot.html">MeterPlot</A>, <A HREF="../../../../org/jfree/chart/plot/PiePlot.html">PiePlot</A>, <A HREF="../../../../org/jfree/chart/plot/ThermometerPlot.html">ThermometerPlot</A>, <A HREF="../../../../org/jfree/chart/plot/XYPlot.html">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">AxisChangeListener</A>, <A HREF="../../../../org/jfree/data/DatasetChangeListener.html">DatasetChangeListener</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html">AxisConstants</A>, java.io.Serializable</DL><P>The base class for all plots in JFreeChart. The <A HREF="../../../../org/jfree/chart/JFreeChart.html"><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>Author:</B></DT> <DD>David Gilbert</DD><DT><B>See Also:</B><DD><A HREF="../../../../serialized-form.html" TARGET="org.jfree.chart.plot.Plot">Serialized Form</A></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><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> <A NAME="fields_inherited_from_class_org.jfree.chart.axis.AxisConstants"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Fields inherited from interface org.jfree.chart.axis.<A HREF="../../../../org/jfree/chart/axis/AxisConstants.html">AxisConstants</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../../org/jfree/chart/axis/AxisConstants.html#DEFAULT_AXIS_LABEL_FONT">DEFAULT_AXIS_LABEL_FONT</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html#DEFAULT_AXIS_LABEL_INSETS">DEFAULT_AXIS_LABEL_INSETS</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html#DEFAULT_AXIS_LABEL_PAINT">DEFAULT_AXIS_LABEL_PAINT</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html#DEFAULT_AXIS_VISIBLE">DEFAULT_AXIS_VISIBLE</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html#DEFAULT_TICK_LABEL_FONT">DEFAULT_TICK_LABEL_FONT</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html#DEFAULT_TICK_LABEL_INSETS">DEFAULT_TICK_LABEL_INSETS</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html#DEFAULT_TICK_LABEL_PAINT">DEFAULT_TICK_LABEL_PAINT</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html#DEFAULT_TICK_LABELS_VISIBLE">DEFAULT_TICK_LABELS_VISIBLE</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html#DEFAULT_TICK_MARK_INSIDE_LENGTH">DEFAULT_TICK_MARK_INSIDE_LENGTH</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html#DEFAULT_TICK_MARK_OUTSIDE_LENGTH">DEFAULT_TICK_MARK_OUTSIDE_LENGTH</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html#DEFAULT_TICK_MARK_PAINT">DEFAULT_TICK_MARK_PAINT</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html#DEFAULT_TICK_MARK_STROKE">DEFAULT_TICK_MARK_STROKE</A>, <A HREF="../../../../org/jfree/chart/axis/AxisConstants.html#DEFAULT_TICK_MARKS_VISIBLE">DEFAULT_TICK_MARKS_VISIBLE</A></CODE></TD></TR></TABLE> <!-- ======== 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 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" 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/jfree/chart/plot/Plot.html#addChangeListener(org.jfree.chart.event.PlotChangeListener)">addChangeListener</A></B>(<A HREF="../../../../org/jfree/chart/event/PlotChangeListener.html">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">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>protected 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">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.ChartRenderingInfo)">draw</A></B>(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D plotArea, <A HREF="../../../../org/jfree/chart/ChartRenderingInfo.html">ChartRenderingInfo</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#drawBackground(java.awt.Graphics2D, java.awt.geom.Rectangle2D)">drawBackground</A></B>(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D area)</CODE><BR> Draw the plot background.</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> Draw 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> float</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#getBackgroundAlpha()">getBackgroundAlpha</A></B>()</CODE><BR> Returns the alpha transparency of the plot area background.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.awt.Image</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#getBackgroundImage()">getBackgroundImage</A></B>()</CODE><BR> Returns the background image that is used to fill the plot's background area.</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/jfree/chart/plot/Plot.html#getBackgroundImageAlignment()">getBackgroundImageAlignment</A></B>()</CODE><BR> Returns the background image alignment.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.awt.Paint</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#getBackgroundPaint()">getBackgroundPaint</A></B>()</CODE><BR> Returns the background color of the plot area.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> double</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#getDataAreaRatio()">getDataAreaRatio</A></B>()</CODE><BR> Returns the data area ratio.</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">DatasetGroup</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/plot/Plot.html#getDatasetGroup()">getDatasetGroup</A></B>()</CODE><BR> Returns the dataset group for the plot.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../../org/jfree/chart/plot/DrawingSupplier.html">DrawingSupplier</A></CODE></FONT></TD>⌨️ 快捷键说明
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