xydataset.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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<TD><B>Methods inherited from interface org.jfree.data.<A HREF="../../../org/jfree/data/Dataset.html" title="interface in org.jfree.data">Dataset</A></B></TD>
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<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>
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<B>Method Detail</B></FONT></TD>
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<A NAME="getItemCount(int)"><!-- --></A><H3>
getItemCount</H3>
<PRE>
public int <B>getItemCount</B>(int&nbsp;series)</PRE>
<DL>
<DD>Returns the number of items in a series.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>series</CODE> - the series (zero-based index).
<DT><B>Returns:</B><DD>The item count.</DL>
</DD>
</DL>
<HR>

<A NAME="getXValue(int, int)"><!-- --></A><H3>
getXValue</H3>
<PRE>
public java.lang.Number <B>getXValue</B>(int&nbsp;series,
                                  int&nbsp;item)</PRE>
<DL>
<DD>Returns the x-value for an item within a series.  The x-values may or may not be returned
 in ascending order, that is up to the class implementing the interface.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>series</CODE> - the series (zero-based index).<DD><CODE>item</CODE> - the item (zero-based index).
<DT><B>Returns:</B><DD>The x-value (possibly <code>null</code>).</DL>
</DD>
</DL>
<HR>

<A NAME="getX(int, int)"><!-- --></A><H3>
getX</H3>
<PRE>
public double <B>getX</B>(int&nbsp;series,
                   int&nbsp;item)</PRE>
<DL>
<DD>Returns the x-value (as a double primitive) for an item within a series.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>series</CODE> - the series (zero-based index).<DD><CODE>item</CODE> - the item (zero-based index).
<DT><B>Returns:</B><DD>The x-value.</DL>
</DD>
</DL>
<HR>

<A NAME="getYValue(int, int)"><!-- --></A><H3>
getYValue</H3>
<PRE>
public java.lang.Number <B>getYValue</B>(int&nbsp;series,
                                  int&nbsp;item)</PRE>
<DL>
<DD>Returns the y-value for an item within a series.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>series</CODE> - the series (zero-based index).<DD><CODE>item</CODE> - the item (zero-based index).
<DT><B>Returns:</B><DD>the y-value (possibly <code>null</code>).</DL>
</DD>
</DL>
<HR>

<A NAME="getY(int, int)"><!-- --></A><H3>
getY</H3>
<PRE>
public double <B>getY</B>(int&nbsp;series,
                   int&nbsp;item)</PRE>
<DL>
<DD>Returns the y-value (as a double primitive) for an item within a series.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>series</CODE> - the series (zero-based index).<DD><CODE>item</CODE> - the item (zero-based index).
<DT><B>Returns:</B><DD>The y-value.</DL>
</DD>
</DL>
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