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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 16:42:26 BST 2004 --><TITLE>ChartUtilities (JFreeChart Class Library (version 0.9.20))</TITLE><META NAME="keywords" CONTENT="org.jfree.chart.ChartUtilities class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="ChartUtilities (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/ChartRenderingInfo.html" title="class in org.jfree.chart"><B>PREV CLASS</B></A> <A HREF="../../../org/jfree/chart/ClipPath.html" title="class in org.jfree.chart"><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="ChartUtilities.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.chart</FONT><BR>Class ChartUtilities</H2><PRE>java.lang.Object <IMG SRC="../../../resources/inherit.gif" ALT="extended by"><B>org.jfree.chart.ChartUtilities</B></PRE><HR><DL><DT>public abstract class <B>ChartUtilities</B><DT>extends java.lang.Object</DL><P>A collection of utility methods for JFreeChart. Includes methods for converting charts to image formats (PNG and JPEG) plus creating simple HTML image maps.<P><P><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><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#ChartUtilities()">ChartUtilities</A></B>()</CODE><BR> </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>static byte[]</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#encodeAsPNG(java.awt.image.BufferedImage)">encodeAsPNG</A></B>(java.awt.image.BufferedImage image)</CODE><BR> Encodes a <CODE>BufferedImage</CODE> to PNG format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static byte[]</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#encodeAsPNG(java.awt.image.BufferedImage, boolean, int)">encodeAsPNG</A></B>(java.awt.image.BufferedImage image, boolean encodeAlpha, int compression)</CODE><BR> Encodes a <CODE>BufferedImage</CODE> to PNG format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static java.lang.String</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#getImageMap(java.lang.String, org.jfree.chart.ChartRenderingInfo)">getImageMap</A></B>(java.lang.String name, <A HREF="../../../org/jfree/chart/ChartRenderingInfo.html" title="class in org.jfree.chart">ChartRenderingInfo</A> info)</CODE><BR> Creates an HTML image map.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static java.lang.String</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#getImageMap(java.lang.String, org.jfree.chart.ChartRenderingInfo, org.jfree.chart.imagemap.ToolTipTagFragmentGenerator, org.jfree.chart.imagemap.URLTagFragmentGenerator)">getImageMap</A></B>(java.lang.String name, <A HREF="../../../org/jfree/chart/ChartRenderingInfo.html" title="class in org.jfree.chart">ChartRenderingInfo</A> info, <A HREF="../../../org/jfree/chart/imagemap/ToolTipTagFragmentGenerator.html" title="interface in org.jfree.chart.imagemap">ToolTipTagFragmentGenerator</A> toolTipTagFragmentGenerator, <A HREF="../../../org/jfree/chart/imagemap/URLTagFragmentGenerator.html" title="interface in org.jfree.chart.imagemap">URLTagFragmentGenerator</A> urlTagFragmentGenerator)</CODE><BR> Creates an HTML image map.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#saveChartAsJPEG(java.io.File, float, org.jfree.chart.JFreeChart, int, int)">saveChartAsJPEG</A></B>(java.io.File file, float quality, <A HREF="../../../org/jfree/chart/JFreeChart.html" title="class in org.jfree.chart">JFreeChart</A> chart, int width, int height)</CODE><BR> Saves a chart to a file in JPEG format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#saveChartAsJPEG(java.io.File, float, org.jfree.chart.JFreeChart, int, int, org.jfree.chart.ChartRenderingInfo)">saveChartAsJPEG</A></B>(java.io.File file, float quality, <A HREF="../../../org/jfree/chart/JFreeChart.html" title="class in org.jfree.chart">JFreeChart</A> chart, int width, int height, <A HREF="../../../org/jfree/chart/ChartRenderingInfo.html" title="class in org.jfree.chart">ChartRenderingInfo</A> info)</CODE><BR> Saves a chart to a file in JPEG format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#saveChartAsJPEG(java.io.File, org.jfree.chart.JFreeChart, int, int)">saveChartAsJPEG</A></B>(java.io.File file, <A HREF="../../../org/jfree/chart/JFreeChart.html" title="class in org.jfree.chart">JFreeChart</A> chart, int width, int height)</CODE><BR> Saves a chart to a file in JPEG format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#saveChartAsJPEG(java.io.File, org.jfree.chart.JFreeChart, int, int, org.jfree.chart.ChartRenderingInfo)">saveChartAsJPEG</A></B>(java.io.File file, <A HREF="../../../org/jfree/chart/JFreeChart.html" title="class in org.jfree.chart">JFreeChart</A> chart, int width, int height, <A HREF="../../../org/jfree/chart/ChartRenderingInfo.html" title="class in org.jfree.chart">ChartRenderingInfo</A> info)</CODE><BR> Saves a chart to a file in JPEG format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#saveChartAsPNG(java.io.File, org.jfree.chart.JFreeChart, int, int)">saveChartAsPNG</A></B>(java.io.File file, <A HREF="../../../org/jfree/chart/JFreeChart.html" title="class in org.jfree.chart">JFreeChart</A> chart, int width, int height)</CODE><BR> Saves a chart to the specified file in PNG format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#saveChartAsPNG(java.io.File, org.jfree.chart.JFreeChart, int, int, org.jfree.chart.ChartRenderingInfo)">saveChartAsPNG</A></B>(java.io.File file, <A HREF="../../../org/jfree/chart/JFreeChart.html" title="class in org.jfree.chart">JFreeChart</A> chart, int width, int height, <A HREF="../../../org/jfree/chart/ChartRenderingInfo.html" title="class in org.jfree.chart">ChartRenderingInfo</A> info)</CODE><BR> Saves a chart to a file in PNG format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#saveChartAsPNG(java.io.File, org.jfree.chart.JFreeChart, int, int, org.jfree.chart.ChartRenderingInfo, boolean, int)">saveChartAsPNG</A></B>(java.io.File file, <A HREF="../../../org/jfree/chart/JFreeChart.html" title="class in org.jfree.chart">JFreeChart</A> chart, int width, int height, <A HREF="../../../org/jfree/chart/ChartRenderingInfo.html" title="class in org.jfree.chart">ChartRenderingInfo</A> info, boolean encodeAlpha, int compression)</CODE><BR> Saves a chart to a file in PNG format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#writeBufferedImageAsJPEG(java.io.OutputStream, java.awt.image.BufferedImage)">writeBufferedImageAsJPEG</A></B>(java.io.OutputStream out, java.awt.image.BufferedImage image)</CODE><BR> Writes a <CODE>BufferedImage</CODE> to an output stream in JPEG format.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/jfree/chart/ChartUtilities.html#writeBufferedImageAsJPEG(java.io.OutputStream, float, java.awt.image.BufferedImage)">writeBufferedImageAsJPEG</A></B>(java.io.OutputStream out,⌨️ 快捷键说明
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