xydataitem.html

JFreeChart 9.20的文档 需要用JAVA在网页上做统计图的东东

<TD COLSPAN=1><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TD>
</TR>
</TABLE>

<A NAME="XYDataItem(java.lang.Number, java.lang.Number)"><!-- --></A><H3>
XYDataItem</H3>
<PRE>
public <B>XYDataItem</B>(java.lang.Number&nbsp;x,
                  java.lang.Number&nbsp;y)</PRE>
<DL>
<DD>Constructs a new data item.
<P>
<DT><B>Parameters:</B><DD><CODE>x</CODE> - the x-value (<code>null</code> NOT permitted).<DD><CODE>y</CODE> - the y-value (<code>null</code> permitted).</DL>
<HR>

<A NAME="XYDataItem(double, double)"><!-- --></A><H3>
XYDataItem</H3>
<PRE>
public <B>XYDataItem</B>(double&nbsp;x,
                  double&nbsp;y)</PRE>
<DL>
<DD>Constructs a new data pair.
<P>
<DT><B>Parameters:</B><DD><CODE>x</CODE> - the x-value.<DD><CODE>y</CODE> - the y-value.</DL>

<!-- ============ METHOD DETAIL ========== -->

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<B>Method Detail</B></FONT></TD>
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<A NAME="getX()"><!-- --></A><H3>
getX</H3>
<PRE>
public java.lang.Number <B>getX</B>()</PRE>
<DL>
<DD>Returns the x-value.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the x-value (never <code>null</code>).</DL>
</DD>
</DL>
<HR>

<A NAME="getY()"><!-- --></A><H3>
getY</H3>
<PRE>
public java.lang.Number <B>getY</B>()</PRE>
<DL>
<DD>Returns the y-value.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the y-value (possibly <code>null</code>).</DL>
</DD>
</DL>
<HR>

<A NAME="setY(java.lang.Number)"><!-- --></A><H3>
setY</H3>
<PRE>
public void <B>setY</B>(java.lang.Number&nbsp;y)</PRE>
<DL>
<DD>Sets the y-value for this data pair.
 <P>
 Note that there is no corresponding method to change the x-value.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>y</CODE> - the new y-value (<code>null</code> permitted).</DL>
</DD>
</DL>
<HR>

<A NAME="compareTo(java.lang.Object)"><!-- --></A><H3>
compareTo</H3>
<PRE>
public int <B>compareTo</B>(java.lang.Object&nbsp;o1)</PRE>
<DL>
<DD>Returns an integer indicating the order of this object relative to another object.
 <P>
 For the order we consider only the x-value:
 negative == "less-than", zero == "equal", positive == "greater-than".
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>compareTo</CODE> in interface <CODE>java.lang.Comparable</CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o1</CODE> - the object being compared to.
<DT><B>Returns:</B><DD>an integer indicating the order of this data pair object
      relative to another object.</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 this object.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a clone.
<DT><B>Throws:</B>
<DD><CODE>java.lang.CloneNotSupportedException</CODE> - not thrown by this class, but subclasses may differ.</DL>
</DD>
</DL>
<HR>

<A NAME="equals(java.lang.Object)"><!-- --></A><H3>
equals</H3>
<PRE>
public boolean <B>equals</B>(java.lang.Object&nbsp;o)</PRE>
<DL>
<DD>Tests if this object is equal to another.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>o</CODE> - the object to test against for equality (<code>null</code> permitted).
<DT><B>Returns:</B><DD>A boolean.</DL>
</DD>
</DL>
<HR>

<A NAME="hashCode()"><!-- --></A><H3>
hashCode</H3>
<PRE>
public int <B>hashCode</B>()</PRE>
<DL>
<DD>Returns a hash code.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a hash code.</DL>
</DD>
</DL>
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