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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 1.5.0_07) on Fri Aug 25 15:15:36 BST 2006 --><TITLE>CategoryToPieDataset (JFreeChart Class Library (version 1.0.2))</TITLE><META NAME="keywords" CONTENT="org.jfree.data.category.CategoryToPieDataset class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="CategoryToPieDataset (JFreeChart Class Library (version 1.0.2))";}</SCRIPT><NOSCRIPT></NOSCRIPT></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=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE 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//--></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.category</FONT><BR>Class CategoryToPieDataset</H2><PRE>java.lang.Object <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../org/jfree/data/general/AbstractDataset.html" title="class in org.jfree.data.general">org.jfree.data.general.AbstractDataset</A> <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.jfree.data.category.CategoryToPieDataset</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>java.io.ObjectInputValidation, java.io.Serializable, java.lang.Cloneable, java.util.EventListener, <A HREF="../../../../org/jfree/data/general/Dataset.html" title="interface in org.jfree.data.general">Dataset</A>, <A HREF="../../../../org/jfree/data/general/DatasetChangeListener.html" title="interface in org.jfree.data.general">DatasetChangeListener</A>, <A HREF="../../../../org/jfree/data/general/PieDataset.html" title="interface in org.jfree.data.general">PieDataset</A>, <A HREF="../../../../org/jfree/data/KeyedValues.html" title="interface in org.jfree.data">KeyedValues</A>, <A HREF="../../../../org/jfree/data/Values.html" title="interface in org.jfree.data">Values</A></DD></DL><HR><DL><DT><PRE>public class <A HREF="../../../../src-html/org/jfree/data/category/CategoryToPieDataset.html#line.66"><B>CategoryToPieDataset</B></A><DT>extends <A HREF="../../../../org/jfree/data/general/AbstractDataset.html" title="class in org.jfree.data.general">AbstractDataset</A><DT>implements <A HREF="../../../../org/jfree/data/general/PieDataset.html" title="interface in org.jfree.data.general">PieDataset</A>, <A HREF="../../../../org/jfree/data/general/DatasetChangeListener.html" title="interface in org.jfree.data.general">DatasetChangeListener</A></DL></PRE><P>A <A HREF="../../../../org/jfree/data/general/PieDataset.html" title="interface in org.jfree.data.general"><CODE>PieDataset</CODE></A> implementation that obtains its data from one row or column of a <A HREF="../../../../org/jfree/data/category/CategoryDataset.html" title="interface in org.jfree.data.category"><CODE>CategoryDataset</CODE></A>.<P><P><DL><DT><B>See Also:</B><DD><A HREF="../../../../serialized-form.html#org.jfree.data.category.CategoryToPieDataset">Serialized Form</A></DL><HR><P><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../org/jfree/data/category/CategoryToPieDataset.html#CategoryToPieDataset(org.jfree.data.category.CategoryDataset, org.jfree.util.TableOrder, int)">CategoryToPieDataset</A></B>(<A HREF="../../../../org/jfree/data/category/CategoryDataset.html" title="interface in org.jfree.data.category">CategoryDataset</A> source, org.jfree.util.TableOrder extract, int index)</CODE><BR> An adaptor class that converts any <A HREF="../../../../org/jfree/data/category/CategoryDataset.html" title="interface in org.jfree.data.category"><CODE>CategoryDataset</CODE></A> into a <A HREF="../../../../org/jfree/data/general/PieDataset.html" title="interface in org.jfree.data.general"><CODE>PieDataset</CODE></A>, by taking the values from a single row or column.</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"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Method Summary</B></FONT></TH></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/category/CategoryToPieDataset.html#datasetChanged(org.jfree.data.general.DatasetChangeEvent)">datasetChanged</A></B>(<A HREF="../../../../org/jfree/data/general/DatasetChangeEvent.html" title="class in org.jfree.data.general">DatasetChangeEvent</A> event)</CODE><BR> Sends a <A HREF="../../../../org/jfree/data/general/DatasetChangeEvent.html" title="class in org.jfree.data.general"><CODE>DatasetChangeEvent</CODE></A> to all registered listeners, with this (not the underlying) dataset as the source.</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/data/category/CategoryToPieDataset.html#equals(java.lang.Object)">equals</A></B>(java.lang.Object obj)</CODE><BR> Tests this dataset for equality with an arbitrary object, returning <code>true</code> if <code>obj</code> is a dataset containing the same keys and values in the same order as this dataset.</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/data/category/CategoryToPieDataset.html#getExtractIndex()">getExtractIndex</A></B>()</CODE><BR> Returns the index of the row or column from which to extract the data.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> org.jfree.util.TableOrder</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/data/category/CategoryToPieDataset.html#getExtractType()">getExtractType</A></B>()</CODE><BR> Returns the extract type, which determines whether data is read from one row or one column of the underlying dataset.</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/data/category/CategoryToPieDataset.html#getIndex(java.lang.Comparable)">getIndex</A></B>(java.lang.Comparable key)</CODE><BR> Returns the index for a given key, or <code>-1</code> if there is no such key.</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/data/category/CategoryToPieDataset.html#getItemCount()">getItemCount</A></B>()</CODE><BR> Returns the number of items (values) in the collection.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Comparable</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/data/category/CategoryToPieDataset.html#getKey(int)">getKey</A></B>(int index)</CODE><BR> Returns the key at the specified index.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.util.List</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/data/category/CategoryToPieDataset.html#getKeys()">getKeys</A></B>()</CODE><BR> Returns the keys for the dataset.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../../org/jfree/data/category/CategoryDataset.html" title="interface in org.jfree.data.category">CategoryDataset</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/data/category/CategoryToPieDataset.html#getUnderlyingDataset()">getUnderlyingDataset</A></B>()</CODE><BR> Returns the underlying dataset.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Number</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/data/category/CategoryToPieDataset.html#getValue(java.lang.Comparable)">getValue</A></B>(java.lang.Comparable key)</CODE><BR> Returns the value for a given key.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.Number</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../org/jfree/data/category/CategoryToPieDataset.html#getValue(int)">getValue</A></B>(int item)</CODE><BR> Returns a value from the dataset.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_org.jfree.data.general.AbstractDataset"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TH ALIGN="left"><B>Methods inherited from class org.jfree.data.general.<A HREF="../../../../org/jfree/data/general/AbstractDataset.html" title="class in org.jfree.data.general">AbstractDataset</A></B></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../../org/jfree/data/general/AbstractDataset.html#addChangeListener(org.jfree.data.general.DatasetChangeListener)">addChangeListener</A>, <A HREF="../../../../org/jfree/data/general/AbstractDataset.html#clone()">clone</A>, <A HREF="../../../../org/jfree/data/general/AbstractDataset.html#fireDatasetChanged()">fireDatasetChanged</A>, <A HREF="../../../../org/jfree/data/general/AbstractDataset.html#getGroup()">getGroup</A>, <A HREF="../../../../org/jfree/data/general/AbstractDataset.html#hasListener(java.util.EventListener)">hasListener</A>, <A HREF="../../../../org/jfree/data/general/AbstractDataset.html#notifyListeners(org.jfree.data.general.DatasetChangeEvent)">notifyListeners</A>, <A HREF="../../../../org/jfree/data/general/AbstractDataset.html#removeChangeListener(org.jfree.data.general.DatasetChangeListener)">removeChangeListener</A>, <A HREF="../../../../org/jfree/data/general/AbstractDataset.html#setGroup(org.jfree.data.general.DatasetGroup)">setGroup</A>, <A HREF="../../../../org/jfree/data/general/AbstractDataset.html#validateObject()">validateObject</A></CODE></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"><TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_org.jfree.data.general.Dataset"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TH ALIGN="left"><B>Methods inherited from interface org.jfree.data.general.<A HREF="../../../../org/jfree/data/general/Dataset.html" title="interface in org.jfree.data.general">Dataset</A></B></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../../org/jfree/data/general/Dataset.html#addChangeListener(org.jfree.data.general.DatasetChangeListener)">addChangeListener</A>, <A HREF="../../../../org/jfree/data/general/Dataset.html#getGroup()">getGroup</A>, <A HREF="../../../../org/jfree/data/general/Dataset.html#removeChangeListener(org.jfree.data.general.DatasetChangeListener)">removeChangeListener</A>, <A HREF="../../../../org/jfree/data/general/Dataset.html#setGroup(org.jfree.data.general.DatasetGroup)">setGroup</A></CODE></TD></TR></TABLE> <P><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"><B>Constructor Detail</B></FONT></TH></TR></TABLE><A NAME="CategoryToPieDataset(org.jfree.data.category.CategoryDataset, org.jfree.util.TableOrder, int)"><!-- --></A><H3>CategoryToPieDataset</H3><PRE>public <A HREF="../../../../src-html/org/jfree/data/category/CategoryToPieDataset.html#line.92"><B>CategoryToPieDataset</B></A>(<A HREF="../../../../org/jfree/data/category/CategoryDataset.html" title="interface in org.jfree.data.category">CategoryDataset</A> source, org.jfree.util.TableOrder extract, int index)</PRE><DL><DD>An adaptor class that converts any <A HREF="../../../../org/jfree/data/category/CategoryDataset.html" title="interface in org.jfree.data.category"><CODE>CategoryDataset</CODE></A> into a <A HREF="../../../../org/jfree/data/general/PieDataset.html" title="interface in org.jfree.data.general"><CODE>PieDataset</CODE></A>, by taking the values from a single row or column. <p> If <code>source</code> is <code>null</code>, the created dataset will be empty.<P>⌨️ 快捷键说明
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