JFreeChart 在 Y 轴上将整数值显示为浮点数

Question

我正在使用 JFreeChart 创建时间序列图，但是当我将整数值作为 Y 轴传递时，它显示为浮点数！！
什么问题？
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：

Answer 1

您可以强制整数刻度单位为：

priceAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

但是，您可以通过覆盖 Dataset() 的 getY() 以返回 Integer 实例来控制刻度单位。