如何使用JFreeChart TimeSeries图表在绘图点处显示形状？

Question

我正在使用JFreeChart v1.0.19创建以下时间序列图：

...使用以下代码：

final String chartTitle = "";
final XYDataset dataset = createDataset1();

final JFreeChart chart = ChartFactory.createTimeSeriesChart(
    chartTitle, "Year End", "Turnover", dataset, true, false, false);

final XYPlot plot = chart.getXYPlot();
final NumberAxis axis2 = new NumberAxis("Cash");
axis2.setAutoRangeIncludesZero(false);
plot.setRangeAxis(1, axis2);
plot.setDataset(1, createDataset2());
plot.mapDatasetToRangeAxis(1, 1);

final StandardXYItemRenderer renderer1 = new StandardXYItemRenderer();
renderer1.setSeriesPaint(0, Color.blue);
renderer1.setSeriesShape(0, ShapeUtilities.createDiamond(5));
renderer1.setSeriesShapesFilled(0, true);
plot.setRenderer(0, renderer1);

final StandardXYItemRenderer renderer2 = new StandardXYItemRenderer();
renderer2.setSeriesPaint(0, Color.black);
renderer2.setSeriesShape(0, ShapeUtilities.createDiamond(5));
renderer2.setSeriesShapesFilled(0, true);
plot.setRenderer(1, renderer2);

chart.getPlot().setBackgroundPaint(Color.WHITE);
chart.getXYPlot().setDomainGridlinePaint(Color.LIGHT_GRAY);
chart.getXYPlot().setRangeGridlinePaint(Color.LIGHT_GRAY);

...但是我无法获得显示形状的数据点。这可能吗？

Answer 1

问题出在我的渲染器上。从StandardXYItemRenderer更改为XYLineAndShapeRenderer，例如

XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(true,true);

...成功了。构造函数中的两个布尔args分别用于打开/关闭线条和形状。