如果橫座標是時間,我們可以改變時間的顯示格式
XYPlot plot = chart.getXYPlot();
DateAxis axis = (DateAxis) plot.getDomainAxis();
axis.setDateFormatOverride(new SimpleDateFormat("MM-dd-yyyy"));
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縱向顯示
XYPlot plot = chart.getXYPlot();
plot.setOrientation(PlotOrientation.HORIZONTAL);
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自定義橫座標步長
XYPlot plot = chart.getXYPlot();
DateAxis dateaxis = (DateAxis)plot.getDomainAxis();
dateaxis.setAutoTickUnitSelection(false);
dateaxis.setTickUnit(new DateTickUnit(DateTickUnit.MONTH,2));