defaultcategorydataset.html
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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 11:26:54 BST 2003 --><TITLE>DefaultCategoryDataset (JFreeChart Class Library (version 0.9.12))</TITLE><META NAME="keywords" CONTENT="org.jfree.data.DefaultCategoryDataset,DefaultCategoryDataset class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"></HEAD><SCRIPT>function asd(){parent.document.title="DefaultCategoryDataset (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 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SIZE="-2"> <A HREF="../../../org/jfree/data/DateRange.html"><B>PREV CLASS</B></A> <A HREF="../../../org/jfree/data/DefaultContourDataset.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="DefaultCategoryDataset.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 | 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><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.jfree.data</FONT><BR>Class DefaultCategoryDataset</H2><PRE>java.lang.Object | +--<A HREF="../../../org/jfree/data/AbstractDataset.html">org.jfree.data.AbstractDataset</A> | +--<B>org.jfree.data.DefaultCategoryDataset</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../org/jfree/data/CategoryDataset.html">CategoryDataset</A>, java.lang.Cloneable, <A HREF="../../../org/jfree/data/Dataset.html">Dataset</A>, <A HREF="../../../org/jfree/data/KeyedValues2D.html">KeyedValues2D</A>, java.io.ObjectInputValidation, java.io.Serializable, <A HREF="../../../org/jfree/data/Values2D.html">Values2D</A></DD></DL><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../org/jfree/data/DefaultKeyedValues2DDataset.html">DefaultKeyedValues2DDataset</A>, <A HREF="../../../org/jfree/data/JDBCCategoryDataset.html">JDBCCategoryDataset</A></DD></DL><HR><DL><DT>public class <B>DefaultCategoryDataset</B><DT>extends <A HREF="../../../org/jfree/data/AbstractDataset.html">AbstractDataset</A><DT>implements <A HREF="../../../org/jfree/data/CategoryDataset.html">CategoryDataset</A>, java.io.Serializable</DL><P>A default implementation of the <A HREF="../../../org/jfree/data/CategoryDataset.html"><CODE>CategoryDataset</CODE></A> interface.<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.data.DefaultCategoryDataset">Serialized Form</A></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== 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><CODE><B><A HREF="../../../org/jfree/data/DefaultCategoryDataset.html#DefaultCategoryDataset()">DefaultCategoryDataset</A></B>()</CODE><BR> Creates a new (empty) dataset.</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/data/DefaultCategoryDataset.html#addValue(double, java.lang.Comparable, java.lang.Comparable)">addValue</A></B>(double value, java.lang.Comparable rowKey, java.lang.Comparable columnKey)</CODE><BR> Adds a value to the table.</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/data/DefaultCategoryDataset.html#addValue(java.lang.Number, java.lang.Comparable, java.lang.Comparable)">addValue</A></B>(java.lang.Number value, java.lang.Comparable rowKey, java.lang.Comparable columnKey)</CODE><BR> Adds a value to the table.</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/DefaultCategoryDataset.html#equals(java.lang.Object)">equals</A></B>(java.lang.Object o)</CODE><BR> Tests if this object is equal to another.</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/DefaultCategoryDataset.html#getColumnCount()">getColumnCount</A></B>()</CODE><BR> Returns the number of columns in the table.</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/DefaultCategoryDataset.html#getColumnIndex(java.lang.Comparable)">getColumnIndex</A></B>(java.lang.Comparable key)</CODE><BR> Returns the column index for a given key.</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/DefaultCategoryDataset.html#getColumnKey(int)">getColumnKey</A></B>(int column)</CODE><BR> Returns a column key.</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/DefaultCategoryDataset.html#getColumnKeys()">getColumnKeys</A></B>()</CODE><BR> Returns the column keys.</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/DefaultCategoryDataset.html#getRowCount()">getRowCount</A></B>()</CODE><BR> Returns the number of rows in the table.</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/DefaultCategoryDataset.html#getRowIndex(java.lang.Comparable)">getRowIndex</A></B>(java.lang.Comparable key)</CODE><BR> Returns the row index for a given key.</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/DefaultCategoryDataset.html#getRowKey(int)">getRowKey</A></B>(int row)</CODE><BR> Returns a row key.</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/DefaultCategoryDataset.html#getRowKeys()">getRowKeys</A></B>()</CODE><BR> Returns the row keys.</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/DefaultCategoryDataset.html#getValue(java.lang.Comparable, java.lang.Comparable)">getValue</A></B>(java.lang.Comparable rowKey, java.lang.Comparable columnKey)</CODE><BR> Returns the value for a pair of keys.</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/DefaultCategoryDataset.html#getValue(int, int)">getValue</A></B>(int row, int column)</CODE><BR> Returns a value from the table.</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/data/DefaultCategoryDataset.html#removeColumn(java.lang.Comparable)">removeColumn</A></B>(java.lang.Comparable columnKey)</CODE><BR> Removes a column from the dataset.</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/data/DefaultCategoryDataset.html#removeColumn(int)">removeColumn</A></B>(int columnIndex)</CODE><BR> Removes a column from the dataset.</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/data/DefaultCategoryDataset.html#removeRow(java.lang.Comparable)">removeRow</A></B>(java.lang.Comparable rowKey)</CODE><BR> Removes a row from the dataset.</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/data/DefaultCategoryDataset.html#removeRow(int)">removeRow</A></B>(int rowIndex)</CODE><BR> Removes a row from the dataset.</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/data/DefaultCategoryDataset.html#removeValue(java.lang.Comparable, java.lang.Comparable)">removeValue</A></B>(java.lang.Comparable rowKey, java.lang.Comparable columnKey)</CODE><BR> Removes a value from the dataset.</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/data/DefaultCategoryDataset.html#setValue(double, java.lang.Comparable, java.lang.Comparable)">setValue</A></B>(double value, java.lang.Comparable rowKey, java.lang.Comparable columnKey)</CODE><BR> Adds or updates a value in the table.</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/data/DefaultCategoryDataset.html#setValue(java.lang.Number, java.lang.Comparable, java.lang.Comparable)">setValue</A></B>(java.lang.Number value, java.lang.Comparable rowKey, java.lang.Comparable columnKey)</CODE><BR> Adds or updates a value in the table.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_org.jfree.data.AbstractDataset"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class org.jfree.data.<A HREF="../../../org/jfree/data/AbstractDataset.html">AbstractDataset</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../org/jfree/data/AbstractDataset.html#addChangeListener(org.jfree.data.DatasetChangeListener)">addChangeListener</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#clone()">clone</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#fireDatasetChanged()">fireDatasetChanged</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#getGroup()">getGroup</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#notifyListeners(org.jfree.data.DatasetChangeEvent)">notifyListeners</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#removeChangeListener(org.jfree.data.DatasetChangeListener)">removeChangeListener</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#setGroup(org.jfree.data.DatasetGroup)">setGroup</A>, <A HREF="../../../org/jfree/data/AbstractDataset.html#validateObject()">validateObject</A></CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from class java.lang.Object</B></TD></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.Dataset"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from interface org.jfree.data.<A HREF="../../../org/jfree/data/Dataset.html">Dataset</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../org/jfree/data/Dataset.html#addChangeListener(org.jfree.data.DatasetChangeListener)">addChangeListener</A>, <A HREF="../../../org/jfree/data/Dataset.html#getGroup()">getGroup</A>, <A HREF="../../../org/jfree/data/Dataset.html#removeChangeListener(org.jfree.data.DatasetChangeListener)">removeChangeListener</A>, <A HREF="../../../org/jfree/data/Dataset.html#setGroup(org.jfree.data.DatasetGroup)">setGroup</A></CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Constructor Detail</B></FONT></TD></TR></TABLE><A NAME="DefaultCategoryDataset()"><!-- --></A><H3>DefaultCategoryDataset</H3><PRE>public <B>DefaultCategoryDataset</B>()</PRE><DL><DD>Creates a new (empty) dataset.<P></DL><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Method Detail</B></FONT></TD></TR></TABLE><A NAME="getRowCount()"><!-- --></A><H3>getRowCount</H3><PRE>public int <B>getRowCount</B>()</PRE><DL><DD>Returns the number of rows in the table.<P><DD><DL><DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/jfree/data/Values2D.html#getRowCount()">getRowCount</A></CODE> in interface <CODE><A HREF="../../../org/jfree/data/Values2D.html">Values2D</A></CODE></DL></DD><DD><DL><DT><B>Returns:</B><DD>the row count.</DL></DD></DL><HR>⌨️ 快捷键说明
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