abstractdataset.html

JFreeChart 9.20的文档 需要用JAVA在网页上做统计图的东东

<A NAME="AbstractDataset()"><!-- --></A><H3>
AbstractDataset</H3>
<PRE>
protected <B>AbstractDataset</B>()</PRE>
<DL>
<DD>Constructs a dataset.
 <P>
 By default, the dataset is assigned to its own group.
<P>
</DL>

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<B>Method Detail</B></FONT></TD>
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<A NAME="getGroup()"><!-- --></A><H3>
getGroup</H3>
<PRE>
public <A HREF="../../../org/jfree/data/DatasetGroup.html" title="class in org.jfree.data">DatasetGroup</A> <B>getGroup</B>()</PRE>
<DL>
<DD>Returns the dataset group for the dataset.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/jfree/data/Dataset.html#getGroup()">getGroup</A></CODE> in interface <CODE><A HREF="../../../org/jfree/data/Dataset.html" title="interface in org.jfree.data">Dataset</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the dataset group.</DL>
</DD>
</DL>
<HR>

<A NAME="setGroup(org.jfree.data.DatasetGroup)"><!-- --></A><H3>
setGroup</H3>
<PRE>
public void <B>setGroup</B>(<A HREF="../../../org/jfree/data/DatasetGroup.html" title="class in org.jfree.data">DatasetGroup</A>&nbsp;group)</PRE>
<DL>
<DD>Sets the dataset group for the dataset.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/jfree/data/Dataset.html#setGroup(org.jfree.data.DatasetGroup)">setGroup</A></CODE> in interface <CODE><A HREF="../../../org/jfree/data/Dataset.html" title="interface in org.jfree.data">Dataset</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>group</CODE> - the dataset group.</DL>
</DD>
</DL>
<HR>

<A NAME="addChangeListener(org.jfree.data.DatasetChangeListener)"><!-- --></A><H3>
addChangeListener</H3>
<PRE>
public void <B>addChangeListener</B>(<A HREF="../../../org/jfree/data/DatasetChangeListener.html" title="interface in org.jfree.data">DatasetChangeListener</A>&nbsp;listener)</PRE>
<DL>
<DD>Registers an object to receive notification of changes to the dataset.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/jfree/data/Dataset.html#addChangeListener(org.jfree.data.DatasetChangeListener)">addChangeListener</A></CODE> in interface <CODE><A HREF="../../../org/jfree/data/Dataset.html" title="interface in org.jfree.data">Dataset</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>listener</CODE> - the object to register.</DL>
</DD>
</DL>
<HR>

<A NAME="removeChangeListener(org.jfree.data.DatasetChangeListener)"><!-- --></A><H3>
removeChangeListener</H3>
<PRE>
public void <B>removeChangeListener</B>(<A HREF="../../../org/jfree/data/DatasetChangeListener.html" title="interface in org.jfree.data">DatasetChangeListener</A>&nbsp;listener)</PRE>
<DL>
<DD>Deregisters an object so that it no longer receives notification of changes to the dataset.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/jfree/data/Dataset.html#removeChangeListener(org.jfree.data.DatasetChangeListener)">removeChangeListener</A></CODE> in interface <CODE><A HREF="../../../org/jfree/data/Dataset.html" title="interface in org.jfree.data">Dataset</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>listener</CODE> - the object to deregister.</DL>
</DD>
</DL>
<HR>

<A NAME="fireDatasetChanged()"><!-- --></A><H3>
fireDatasetChanged</H3>
<PRE>
protected void <B>fireDatasetChanged</B>()</PRE>
<DL>
<DD>Notifies all registered listeners that the dataset has changed.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="notifyListeners(org.jfree.data.DatasetChangeEvent)"><!-- --></A><H3>
notifyListeners</H3>
<PRE>
protected void <B>notifyListeners</B>(<A HREF="../../../org/jfree/data/DatasetChangeEvent.html" title="class in org.jfree.data">DatasetChangeEvent</A>&nbsp;event)</PRE>
<DL>
<DD>Notifies all registered listeners that the dataset has changed.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>event</CODE> - contains information about the event that triggered the notification.</DL>
</DD>
</DL>
<HR>

<A NAME="clone()"><!-- --></A><H3>
clone</H3>
<PRE>
public java.lang.Object <B>clone</B>()
                       throws java.lang.CloneNotSupportedException</PRE>
<DL>
<DD>Returns a clone of the dataset. 
 <p>
 The cloned dataset will NOT include the <A HREF="../../../org/jfree/data/DatasetChangeListener.html" title="interface in org.jfree.data"><CODE>DatasetChangeListener</CODE></A> references that have
 been registered with this dataset.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>A clone.
<DT><B>Throws:</B>
<DD><CODE>java.lang.CloneNotSupportedException</CODE> - if the dataset does not support cloning.</DL>
</DD>
</DL>
<HR>

<A NAME="validateObject()"><!-- --></A><H3>
validateObject</H3>
<PRE>
public void <B>validateObject</B>()
                    throws java.io.InvalidObjectException</PRE>
<DL>
<DD>Validates the object. We use this opportunity to call listeners who have registered during 
 the deserialization process, as listeners are not serialized. This method is called by the 
 serialization system after the entire graph is read.
  
 This object has registered itself to the system with a priority of 10. Other callbacks may 
 register with a higher priority number to be called before this object, or with a lower 
 priority number to be called after the listeners were notified.
 
 All listeners are supposed to have register by now, either in their readObject or 
 validateObject methods. Notify them that this dataset has changed.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>validateObject</CODE> in interface <CODE>java.io.ObjectInputValidation</CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>java.io.InvalidObjectException</CODE> - If the object cannot validate itself.</DL>
</DD>
</DL>
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