如何让一月份的数据显示在Y轴上,让01月和Y轴没有间距
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import javax.swing.JPanel;
import org.jfree.chart.*;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.data.time.*;
import org.jfree.data.xy.XYDataset;
import org.jfree.date.SerialDate;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;// Referenced classes of package demo:
// DemoPanelpublic class TimeSeriesDemo11 extends ApplicationFrame
{ public TimeSeriesDemo11(String s)
{
super(s);
setContentPane(createDemoPanel());
} private static JFreeChart createChart(String s, XYDataset xydataset)
{
JFreeChart jfreechart = ChartFactory.createTimeSeriesChart(s, "Date", "Price", xydataset, true, true, false);
XYPlot xyplot = (XYPlot)jfreechart.getPlot();
xyplot.setOrientation(PlotOrientation.VERTICAL);
XYItemRenderer xyitemrenderer = xyplot.getRenderer();
xyitemrenderer.setSeriesPaint(0, Color.blue);
return jfreechart;
} private static XYDataset createDataset(String s, double d, RegularTimePeriod regulartimeperiod, int i)
{
TimeSeries timeseries = new TimeSeries(s, regulartimeperiod.getClass());
RegularTimePeriod regulartimeperiod1 = regulartimeperiod;
double d1 = d;
for (int j = 0; j < i; j++)
{
timeseries.add(regulartimeperiod1, d1);
regulartimeperiod1 = regulartimeperiod1.previous();
d1 *= 1.0D + (Math.random() - 0.495D) / 10D;
} TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();
timeseriescollection.addSeries(timeseries);
return timeseriescollection;
} public static JPanel createDemoPanel()
{
DemoPanel demopanel = new DemoPanel(new GridLayout(2, 2));
demopanel.setPreferredSize(new Dimension(800, 600));
Day day = new Day();
XYDataset xydataset = createDataset("Series 1", 100D, day, 365);
JFreeChart jfreechart = createChart("Chart 1 : 1 Year", xydataset);
ChartPanel chartpanel = new ChartPanel(jfreechart);
demopanel.add(chartpanel);
JFreeChart jfreechart1 = createChart("Chart 2 : 6 Months", xydataset);
SerialDate serialdate = day.getSerialDate();
SerialDate serialdate1 = SerialDate.addMonths(-6, serialdate);
Day day1 = new Day(serialdate1);
XYPlot xyplot = (XYPlot)jfreechart1.getPlot();
DateAxis dateaxis = (DateAxis)xyplot.getDomainAxis();
dateaxis.setRange(day1.getStart(), day.getEnd());
ChartPanel chartpanel1 = new ChartPanel(jfreechart1);
demopanel.add(chartpanel1);
JFreeChart jfreechart2 = createChart("Chart 3 : 3 Months", xydataset);
SerialDate serialdate2 = SerialDate.addMonths(-3, serialdate);
Day day2 = new Day(serialdate2);
XYPlot xyplot1 = (XYPlot)jfreechart2.getPlot();
DateAxis dateaxis1 = (DateAxis)xyplot1.getDomainAxis();
dateaxis1.setRange(day2.getStart(), day.getEnd());
ChartPanel chartpanel2 = new ChartPanel(jfreechart2);
demopanel.add(chartpanel2);
JFreeChart jfreechart3 = createChart("Chart 4 : 1 Month", xydataset);
SerialDate serialdate3 = SerialDate.addMonths(-1, serialdate);
Day day3 = new Day(serialdate3);
XYPlot xyplot2 = (XYPlot)jfreechart3.getPlot();
DateAxis dateaxis2 = (DateAxis)xyplot2.getDomainAxis();
dateaxis2.setRange(day3.getStart(), day.getEnd());
ChartPanel chartpanel3 = new ChartPanel(jfreechart3);
demopanel.add(chartpanel3);
demopanel.addChart(jfreechart);
demopanel.addChart(jfreechart1);
demopanel.addChart(jfreechart2);
demopanel.addChart(jfreechart3);
return demopanel;
} public static void main(String args[])
{
TimeSeriesDemo11 timeseriesdemo11 = new TimeSeriesDemo11("Time Series Demo 11");
timeseriesdemo11.pack();
RefineryUtilities.centerFrameOnScreen(timeseriesdemo11);
timeseriesdemo11.setVisible(true);
}
}