您是否尝试过实施AbstractRenderer#getItemStroke
?
在此示例中,我对系列 2 使用 x > 4 的虚线:
XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(){
Stroke soild = new BasicStroke(2.0f);
Stroke dashed = new BasicStroke(1.0f,BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 10.0f, new float[] {10.0f}, 0.0f);
@Override
public Stroke getItemStroke(int row, int column) {
if (row == 2){
double x = dataset.getXValue(row, column);
if ( x > 4){
return dashed;
} else {
return soild;
}
} else
return super.getItemStroke(row, column);
}
};
renderer.setBaseShapesVisible(true);
renderer.setBaseShapesFilled(true);
renderer.setBaseStroke(new BasicStroke(3));
plot.setRenderer(renderer);
尽管此示例使用的是XYSeries
日期而不是日期,但您应该能够根据需要对其进行修改。
这是完整的例子
import java.awt.BasicStroke;
import java.awt.Stroke;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
public class LineChartDemo2 extends ApplicationFrame {
public LineChartDemo2(String title) {
super(title);
JPanel chartPanel = createDemoPanel();
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(chartPanel);
}
private static JFreeChart createChart(final XYDataset dataset) {
JFreeChart chart = ChartFactory.createXYLineChart(
"Line Chart Demo: XYLineAndShapeRenderer",
"X",
"Y",
dataset,
PlotOrientation.VERTICAL,
false,
false,
false
);
XYPlot plot = (XYPlot) chart.getPlot();
plot.setDomainPannable(true);
plot.setRangePannable(true);
XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(){
Stroke soild = new BasicStroke(2.0f);
Stroke dashed = new BasicStroke(1.0f,BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 10.0f, new float[] {10.0f}, 0.0f);
@Override
public Stroke getItemStroke(int row, int column) {
if (row == 2){
double x = dataset.getXValue(row, column);
if ( x > 4){
return dashed;
} else {
return soild;
}
} else
return super.getItemStroke(row, column);
}
};
renderer.setBaseShapesVisible(true);
renderer.setBaseShapesFilled(true);
renderer.setBaseStroke(new BasicStroke(3));
plot.setRenderer(renderer);
return chart;
}
public static JPanel createDemoPanel() {
JFreeChart chart = createChart(createDataset());
ChartPanel panel = new ChartPanel(chart);
panel.setMouseWheelEnabled(true);
return panel;
}
public static void main(String[] args) {
LineChartDemo2 demo = new LineChartDemo2(
"JFreeChart");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
private static XYDataset createDataset() {
XYSeries series1 = new XYSeries("First");
series1.add(1.0, 1.0);
series1.add(2.0, 4.0);
series1.add(3.0, 3.0);
series1.add(4.0, 5.0);
series1.add(5.0, 5.0);
series1.add(6.0, 7.0);
series1.add(7.0, 7.0);
series1.add(8.0, 8.0);
XYSeries series2 = new XYSeries("Second");
series2.add(1.0, 5.0);
series2.add(2.0, 7.0);
series2.add(3.0, 6.0);
series2.add(4.0, 8.0);
series2.add(5.0, 4.0);
series2.add(6.0, 4.0);
series2.add(7.0, 2.0);
series2.add(8.0, 1.0);
XYSeries series3 = new XYSeries("Third");
series3.add(3.0, 4.0);
series3.add(4.0, 3.0);
series3.add(5.0, 2.0);
series3.add(6.0, 3.0);
series3.add(7.0, 6.0);
series3.add(8.0, 3.0);
series3.add(9.0, 4.0);
series3.add(10.0, 3.0);
XYSeriesCollection dataset = new XYSeriesCollection();
dataset.addSeries(series1);
dataset.addSeries(series2);
dataset.addSeries(series3);
return dataset;
}
}