我正在使用JFreeChart
创建时间序列图,但是当我将Integer值传递为Y轴时,它会将它们显示为float!
问题是什么?
我正在创建这样的图表:
this.TodaySeriesGoldPrice = new TimeSeries("Price",Minute.class);
if(TDD!=null){
for(Map<String, Object> D: TDD){
Calendar C=Calendar.getInstance();
C.setTime(new Date((Long)D.get("timestamp")));
this.TodaySeriesGoldPrice.add(new Minute(C.get(Calendar.MINUTE),C.get(Calendar.HOUR),C.get(Calendar.DAY_OF_MONTH),C.get(Calendar.MONTH),C.get(Calendar.YEAR)),(Integer)(((Map<String,Object>)D.get("tala")).get("Coin")));
}
}
TimeSeriesCollection TodayDataset = new TimeSeriesCollection();
TodayDataset.addSeries(this.TodaySeriesGoldPrice);
TodayDataset.setDomainIsPointsInTime(true);
JFreeChart chart = ChartFactory.createTimeSeriesChart(
"", // title
"Time",// x-axis label
"Price",// y-axis label
TodayDataset,// data
true, // create legend?
true, // generate tooltips?
false // generate URLs?
);
chart.setBackgroundPaint(Color.white);
XYPlot plot = (XYPlot) chart.getPlot();
plot.setBackgroundPaint(Color.lightGray);
plot.setDomainGridlinePaint(Color.white);
plot.setRangeGridlinePaint(Color.white);
plot.setAxisOffset(new RectangleInsets(5.0, 5.0, 5.0, 5.0));
plot.setDomainCrosshairVisible(true);
plot.setRangeCrosshairVisible(true);
plot.getDomainAxis().setLabelFont(new Font("Tahoma",Font.PLAIN,13));
plot.getRangeAxis().setLabelFont(new Font("Tahoma",Font.PLAIN,13));
XYItemRenderer r = plot.getRenderer();
DateAxis axis = (DateAxis) plot.getDomainAxis();
axis.setDateFormatOverride(new SimpleDateFormat("H:mm"));
ChartPanel DCP=new ChartPanel(chart);
dispPanel.setLayout(new BorderLayout());
dispPanel.add(DCP,BorderLayout.CENTER);
结果:
最佳答案
您可以将整数刻度单位强制为:
priceAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
但是,您有可能可以通过重写Dataset()的getY()以返回Integer的实例来控制滴答单位。