eventfrequencydemo1.html

Jfreechart 源码例子 是和jfreechart development Guide文档相配套的

<b>EventFrequencyDemo1</b>
<p>
This demo illustrates the use of a <code>DateAxis</code> instance as the range
axis for a chart.  You can use this technique for both the
<code>CategoryPlot</code> and <code>XYPlot</code> classes.