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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 16:42:29 BST 2004 --><TITLE>CategoryAxis (JFreeChart Class Library (version 0.9.20))</TITLE><META NAME="keywords" CONTENT="org.jfree.chart.axis.CategoryAxis class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="CategoryAxis (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" 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ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../org/jfree/chart/axis/CategoryAnchor.html" title="class in org.jfree.chart.axis"><B>PREV CLASS</B></A> <A HREF="../../../../org/jfree/chart/axis/CategoryAxis3D.html" title="class in org.jfree.chart.axis"><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="CategoryAxis.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.axis</FONT><BR>Class CategoryAxis</H2><PRE>java.lang.Object <IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><A HREF="../../../../org/jfree/chart/axis/Axis.html" title="class in org.jfree.chart.axis">org.jfree.chart.axis.Axis</A> <IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><B>org.jfree.chart.axis.CategoryAxis</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>java.lang.Cloneable, java.io.Serializable</DD></DL><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../org/jfree/chart/axis/CategoryAxis3D.html" title="class in org.jfree.chart.axis">CategoryAxis3D</A>, <A HREF="../../../../org/jfree/chart/axis/ExtendedCategoryAxis.html" title="class in org.jfree.chart.axis">ExtendedCategoryAxis</A>, <A HREF="../../../../org/jfree/chart/axis/SubCategoryAxis.html" title="class in org.jfree.chart.axis">SubCategoryAxis</A></DD></DL><HR><DL><DT>public class <B>CategoryAxis</B><DT>extends <A HREF="../../../../org/jfree/chart/axis/Axis.html" title="class in org.jfree.chart.axis">Axis</A><DT>implements java.lang.Cloneable, java.io.Serializable</DL><P>An axis that displays categories.<P><P><DL><DT><B>See Also:</B><DD><A HREF="../../../../serialized-form.html#org.jfree.chart.axis.CategoryAxis">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 double</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/axis/CategoryAxis.html#DEFAULT_AXIS_MARGIN">DEFAULT_AXIS_MARGIN</A></B></CODE><BR> The default margin for the axis (used for both lower and upper margins).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static double</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/axis/CategoryAxis.html#DEFAULT_CATEGORY_MARGIN">DEFAULT_CATEGORY_MARGIN</A></B></CODE><BR> The default margin between categories (a percentage of the overall axis length).</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected static org.jfree.util.LogContext</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/axis/CategoryAxis.html#logger">logger</A></B></CODE><BR> Access to logging facilities.</TD></TR></TABLE> <A NAME="fields_inherited_from_class_org.jfree.chart.axis.Axis"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Fields inherited from class org.jfree.chart.axis.<A HREF="../../../../org/jfree/chart/axis/Axis.html" title="class in org.jfree.chart.axis">Axis</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_AXIS_LABEL_FONT">DEFAULT_AXIS_LABEL_FONT</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_AXIS_LABEL_INSETS">DEFAULT_AXIS_LABEL_INSETS</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_AXIS_LABEL_PAINT">DEFAULT_AXIS_LABEL_PAINT</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_AXIS_LINE_PAINT">DEFAULT_AXIS_LINE_PAINT</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_AXIS_LINE_STROKE">DEFAULT_AXIS_LINE_STROKE</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_AXIS_VISIBLE">DEFAULT_AXIS_VISIBLE</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_TICK_LABEL_FONT">DEFAULT_TICK_LABEL_FONT</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_TICK_LABEL_INSETS">DEFAULT_TICK_LABEL_INSETS</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_TICK_LABEL_PAINT">DEFAULT_TICK_LABEL_PAINT</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_TICK_LABELS_VISIBLE">DEFAULT_TICK_LABELS_VISIBLE</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_TICK_MARK_INSIDE_LENGTH">DEFAULT_TICK_MARK_INSIDE_LENGTH</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_TICK_MARK_OUTSIDE_LENGTH">DEFAULT_TICK_MARK_OUTSIDE_LENGTH</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_TICK_MARK_PAINT">DEFAULT_TICK_MARK_PAINT</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_TICK_MARK_STROKE">DEFAULT_TICK_MARK_STROKE</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#DEFAULT_TICK_MARKS_VISIBLE">DEFAULT_TICK_MARKS_VISIBLE</A>, <A HREF="../../../../org/jfree/chart/axis/Axis.html#LOGGER">LOGGER</A></CODE></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="../../../../org/jfree/chart/axis/CategoryAxis.html#CategoryAxis()">CategoryAxis</A></B>()</CODE><BR> Creates a new category axis with no label.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../org/jfree/chart/axis/CategoryAxis.html#CategoryAxis(java.lang.String)">CategoryAxis</A></B>(java.lang.String label)</CODE><BR> Constructs a category axis, using default values where necessary.</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/axis/CategoryAxis.html#addCategoryLabelToolTip(java.lang.Comparable, java.lang.String)">addCategoryLabelToolTip</A></B>(java.lang.Comparable category, java.lang.String tooltip)</CODE><BR> Adds a tooltip to the specified category and sends an <A HREF="../../../../org/jfree/chart/event/AxisChangeEvent.html" title="class in org.jfree.chart.event"><CODE>AxisChangeEvent</CODE></A> to all registered listeners.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected double</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/axis/CategoryAxis.html#calculateCategoryGapSize(int, java.awt.geom.Rectangle2D, org.jfree.ui.RectangleEdge)">calculateCategoryGapSize</A></B>(int categoryCount, java.awt.geom.Rectangle2D area, org.jfree.ui.RectangleEdge edge)</CODE><BR> Calculates the size (width or height, depending on the location of the axis) of a category gap.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected double</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/axis/CategoryAxis.html#calculateCategorySize(int, java.awt.geom.Rectangle2D, org.jfree.ui.RectangleEdge)">calculateCategorySize</A></B>(int categoryCount, java.awt.geom.Rectangle2D area, org.jfree.ui.RectangleEdge edge)</CODE><BR> Calculates the size (width or height, depending on the location of the axis) of a category.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected double</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/axis/CategoryAxis.html#calculateTextBlockHeight(org.jfree.text.TextBlock, org.jfree.chart.axis.CategoryLabelPosition, java.awt.Graphics2D)">calculateTextBlockHeight</A></B>(org.jfree.text.TextBlock block, <A HREF="../../../../org/jfree/chart/axis/CategoryLabelPosition.html" title="class in org.jfree.chart.axis">CategoryLabelPosition</A> position, java.awt.Graphics2D g2)</CODE><BR> A utility method for determining the height of a text block.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected double</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/chart/axis/CategoryAxis.html#calculateTextBlockWidth(org.jfree.text.TextBlock, org.jfree.chart.axis.CategoryLabelPosition, java.awt.Graphics2D)">calculateTextBlockWidth</A></B>(org.jfree.text.TextBlock block, <A HREF="../../../../org/jfree/chart/axis/CategoryLabelPosition.html" title="class in org.jfree.chart.axis">CategoryLabelPosition</A> position, java.awt.Graphics2D g2)</CODE><BR> A utility method for determining the width of a text block.</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/axis/CategoryAxis.html#clearCategoryLabelToolTips()">clearCategoryLabelToolTips</A></B>()</CODE>⌨️ 快捷键说明
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