在散点图中更改系列轮廓描边和绘画

Question

我有一个用 ChartFactory.createScatterPlot 创建的散点图。我想在每个点周围画一个轮廓，以便在具有聚集点的区域中获得更好的视觉反馈。我正在这样尝试：

Shape cross  = new Ellipse2D.Double(0,0,5,5);
XYPlot xyPlot = (XYPlot) jfreechart.getPlot();
xyPlot.setDomainCrosshairVisible(true);
xyPlot.setRangeCrosshairVisible(true)
XYItemRenderer renderer = xyPlot.getRenderer();
renderer.setSeriesShape(0, cross);
renderer.setSeriesPaint(0, Color.red);
renderer.setSeriesOutlinePaint(0, Color.black);
renderer.setSeriesOutlineStroke(0, new BasicStroke(2));
renderer.setSeriesStroke(0, new BasicStroke(1));

但是只绘制了新的形状，点没有轮廓：

Answer 1

factory method cited instantiates XYLineAndShapeRenderer, so to see the change you need to invoke setUseOutlinePaint()，以及setSeriesOutlinePaint()和（可选）setSeriesOutlineStroke()。

XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) xyPlot.getRenderer();
renderer.setUseOutlinePaint(true);
renderer.setSeriesOutlinePaint(0, Color.black);
renderer.setSeriesOutlineStroke(0, new BasicStroke(2));

已显示完整示例 here。

在散点图中更改系列轮廓描边和绘画

Changing series outline stroke and paint in scatter plot

java

jfreechart