categorytopiedataset.html

JFreeChart 9.20的文档 需要用JAVA在网页上做统计图的东东

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<A NAME="ROW"><!-- --></A><H3>
ROW</H3>
<PRE>
public static final int <B>ROW</B></PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I>Use the TableOrder class.</I>
<P>
<DD>A constant indicating that data should be extracted from a row.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#org.jfree.data.CategoryToPieDataset.ROW">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="COLUMN"><!-- --></A><H3>
COLUMN</H3>
<PRE>
public static final int <B>COLUMN</B></PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I>Use the TableOrder class.</I>
<P>
<DD>A constant indicating that data should be extracted from a column.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#org.jfree.data.CategoryToPieDataset.COLUMN">Constant Field Values</A></DL>
</DL>

<!-- ========= CONSTRUCTOR DETAIL ======== -->

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<A NAME="CategoryToPieDataset(org.jfree.data.CategoryDataset, org.jfree.util.TableOrder, int)"><!-- --></A><H3>
CategoryToPieDataset</H3>
<PRE>
public <B>CategoryToPieDataset</B>(<A HREF="../../../org/jfree/data/CategoryDataset.html" title="interface in org.jfree.data">CategoryDataset</A>&nbsp;source,
                            org.jfree.util.TableOrder&nbsp;extract,
                            int&nbsp;index)</PRE>
<DL>
<DD>An adaptor class that converts any <A HREF="../../../org/jfree/data/CategoryDataset.html" title="interface in org.jfree.data"><CODE>CategoryDataset</CODE></A> into a <A HREF="../../../org/jfree/data/PieDataset.html" title="interface in org.jfree.data"><CODE>PieDataset</CODE></A>, by
 taking the values from a single row or column.
<P>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - the source dataset (<code>null</code> permitted).<DD><CODE>extract</CODE> - extract data from rows or columns? (<code>null</code> not permitted).<DD><CODE>index</CODE> - the row or column index.</DL>
<HR>

<A NAME="CategoryToPieDataset(org.jfree.data.CategoryDataset, int, int)"><!-- --></A><H3>
CategoryToPieDataset</H3>
<PRE>
public <B>CategoryToPieDataset</B>(<A HREF="../../../org/jfree/data/CategoryDataset.html" title="interface in org.jfree.data">CategoryDataset</A>&nbsp;source,
                            int&nbsp;extract,
                            int&nbsp;index)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I>Use the other constructor.</I>
<P>
<DD>An adaptor class that converts any <A HREF="../../../org/jfree/data/CategoryDataset.html" title="interface in org.jfree.data"><CODE>CategoryDataset</CODE></A> into a <A HREF="../../../org/jfree/data/PieDataset.html" title="interface in org.jfree.data"><CODE>PieDataset</CODE></A>, by
 taking the values from a single row or column.
<P>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - the source dataset.<DD><CODE>extract</CODE> - ROW or COLUMN.<DD><CODE>index</CODE> - the row or column index.</DL>

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<A NAME="getItemCount()"><!-- --></A><H3>
getItemCount</H3>
<PRE>
public int <B>getItemCount</B>()</PRE>
<DL>
<DD>Returns the number of items (values) in the collection.  If the underlying
 dataset is <code>null</code>, this method returns zero.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/jfree/data/Values.html#getItemCount()">getItemCount</A></CODE> in interface <CODE><A HREF="../../../org/jfree/data/Values.html" title="interface in org.jfree.data">Values</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The item count.</DL>
</DD>
</DL>
<HR>

<A NAME="getValue(int)"><!-- --></A><H3>
getValue</H3>
<PRE>
public java.lang.Number <B>getValue</B>(int&nbsp;item)</PRE>
<DL>
<DD>Returns a value.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/jfree/data/Values.html#getValue(int)">getValue</A></CODE> in interface <CODE><A HREF="../../../org/jfree/data/Values.html" title="interface in org.jfree.data">Values</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>item</CODE> - the item index (zero-based).
<DT><B>Returns:</B><DD>The value (possibly <code>null</code>).</DL>
</DD>
</DL>
<HR>

<A NAME="getKey(int)"><!-- --></A><H3>
getKey</H3>
<PRE>
public java.lang.Comparable <B>getKey</B>(int&nbsp;index)</PRE>
<DL>
<DD>Returns a key.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/jfree/data/KeyedValues.html#getKey(int)">getKey</A></CODE> in interface <CODE><A HREF="../../../org/jfree/data/KeyedValues.html" title="interface in org.jfree.data">KeyedValues</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - the item index (zero-based).
<DT><B>Returns:</B><DD>The key.</DL>
</DD>
</DL>
<HR>

<A NAME="getIndex(java.lang.Comparable)"><!-- --></A><H3>
getIndex</H3>
<PRE>
public int <B>getIndex</B>(java.lang.Comparable&nbsp;key)</PRE>
<DL>
<DD>Returns the index for a given key.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/jfree/data/KeyedValues.html#getIndex(java.lang.Comparable)">getIndex</A></CODE> in interface <CODE><A HREF="../../../org/jfree/data/KeyedValues.html" title="interface in org.jfree.data">KeyedValues</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - the key.
<DT><B>Returns:</B><DD>The index.</DL>
</DD>
</DL>
<HR>

<A NAME="getKeys()"><!-- --></A><H3>
getKeys</H3>
<PRE>
public java.util.List <B>getKeys</B>()</PRE>
<DL>
<DD>Returns the keys.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/jfree/data/KeyedValues.html#getKeys()">getKeys</A></CODE> in interface <CODE><A HREF="../../../org/jfree/data/KeyedValues.html" title="interface in org.jfree.data">KeyedValues</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The keys.</DL>
</DD>
</DL>
<HR>

<A NAME="getValue(java.lang.Comparable)"><!-- --></A><H3>
getValue</H3>
<PRE>
public java.lang.Number <B>getValue</B>(java.lang.Comparable&nbsp;key)</PRE>
<DL>
<DD>Returns the value for a given key.  If the key is not recognised, the method should 
 return <code>null</code> (but note that <code>null</code> can be associated with a 
 valid key also).
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/jfree/data/KeyedValues.html#getValue(java.lang.Comparable)">getValue</A></CODE> in interface <CODE><A HREF="../../../org/jfree/data/KeyedValues.html" title="interface in org.jfree.data">KeyedValues</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - the key.
<DT><B>Returns:</B><DD>The value (possibly <code>null</code>).</DL>
</DD>
</DL>
<HR>

<A NAME="datasetChanged(org.jfree.data.DatasetChangeEvent)"><!-- --></A><H3>
datasetChanged</H3>
<PRE>
public void <B>datasetChanged</B>(<A HREF="../../../org/jfree/data/DatasetChangeEvent.html" title="class in org.jfree.data">DatasetChangeEvent</A>&nbsp;event)</PRE>
<DL>
<DD>Passes the <A HREF="../../../org/jfree/data/DatasetChangeEvent.html" title="class in org.jfree.data"><CODE>DatasetChangeEvent</CODE></A> through.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/jfree/data/DatasetChangeListener.html#datasetChanged(org.jfree.data.DatasetChangeEvent)">datasetChanged</A></CODE> in interface <CODE><A HREF="../../../org/jfree/data/DatasetChangeListener.html" title="interface in org.jfree.data">DatasetChangeListener</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>event</CODE> - the event.</DL>
</DD>
</DL>
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