我在使用JFreechart -Api 创建时间序列图时遇到问题。在时间序列图中,我希望 x 轴显示 DAYS-MONTH。确实如此,但是由于SeriesException,我无法在创建时间序列数据时正确设置日期。
我可以提供一个可以编译的最小示例,以查看错误是如何发生的。
我知道 Month-Class 可以将 Date 作为参数
以我使用 Month(Date date)-Consturctor 的方式使用它有什么问题?以及如何设置时间序列数据中的日期,以便它们显示在图中?
(注:不包括进口。)
public class MyTimeSeriesGraphMinimalExample {
public static void main(String args[]) {
TimeSeries timeseries = new TimeSeries("Series 1");
//works not
timeseries.add(new Month(new Date(2002, 1, 1, 12, 45, 23)),
100.10000000000002D);//day 1
timeseries.add(new Month(new Date(2002, 1, 2, 12, 45, 23)),
694.10000000000002D);// day 2
// works timeseries.add(new Month(3, 2002), 734.39999999999998D);
// works timeseries.add(new Month(4, 2002), 453.19999999999999D);
TimeSeries timeseries1 = new TimeSeries("Series 2");
//works not
timeseries1.addOrUpdate(new Month(new Date(2002, 1, 1, 12, 45, 23)),
234.09999999999999D);// day 1
timeseries1.addOrUpdate(new Month(new Date(2002, 1, 2, 12, 45, 23)),
623.70000000000005D);// day 2
//works timeseries1.add(new Month(3, 2002), 642.5D);
//works timeseries1.add(new Month(4, 2002), 700.39999999999998D);
TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();
timeseriescollection.addSeries(timeseries);
timeseriescollection.addSeries(timeseries1);
XYDataset xydataset = timeseriescollection;
//chart-visual-property-settings
JFreeChart jfreechart = ChartFactory.createTimeSeriesChart(
"Time Series Demo 3", "Time", "Value", xydataset, true, true,
false);
XYPlot xyplot = (XYPlot) jfreechart.getPlot();
DateAxis dateaxis = (DateAxis) xyplot.getDomainAxis();
dateaxis.setTickUnit(new DateTickUnit(DateTickUnitType.MONTH, 1,
new SimpleDateFormat("dd-MMM")));
dateaxis.setVerticalTickLabels(true);
XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer) xyplot
.getRenderer();
xylineandshaperenderer.setBaseShapesVisible(true);
xylineandshaperenderer.setSeriesFillPaint(0, Color.red);
xylineandshaperenderer.setSeriesFillPaint(1, Color.green);
xylineandshaperenderer.setSeriesPaint(0, Color.red);
xylineandshaperenderer.setSeriesPaint(1, Color.green);
xylineandshaperenderer.setUseFillPaint(true);
xylineandshaperenderer
.setLegendItemToolTipGenerator(new StandardXYSeriesLabelGenerator(
"Tooltip {0}"));
//draw
try {
ChartUtilities.saveChartAsJPEG(new File("C:/series.jpeg"),
jfreechart, 600, 500);
} catch (Exception e) {
// TODO: handle exception
}
}
}