使用 JFreeChart 在 XYPlot 中创建多个系列的问题
The following example code creates a graph with only one data series. The other two data series will not be created.
The main()-methods contains the data series.
import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.ArrayList;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.StandardXYItemRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import javax.swing.*;
public class MultipleChartFactory {
private XYPlot plot;
private ChartPanel chartPanel;
// datasetIndex is used for multiple datasets
private int datasetIndex = 0;
private ArrayList<XYSeriesCollection> seriesArrayList = new ArrayList<XYSeriesCollection>();
public MultipleChartFactory(String title, String xAxis) {
super();
String yAxis = title;
XYSeriesCollection dataset = createDataset("Series");
JFreeChart chart = ChartFactory.createXYLineChart("", xAxis, yAxis, dataset, PlotOrientation.VERTICAL, false, false, false);
chart.setBackgroundPaint(Color.white);
plot = chart.getXYPlot();
plot.setBackgroundPaint(Color.lightGray);
plot.setDomainGridlinePaint(Color.white);
plot.setRangeGridlinePaint(Color.white);
ValueAxis axis = plot.getDomainAxis();
axis.setAutoRange(true);
NumberAxis rangeAxis2 = new NumberAxis("Range Axis 2");
rangeAxis2.setAutoRangeIncludesZero(false);
JPanel content = new JPanel(new BorderLayout());
chartPanel = new ChartPanel(chart);
content.add(chartPanel);
}
private XYSeriesCollection createDataset(String name) {
XYSeries series = new XYSeries(name);
return new XYSeriesCollection(series);
}
public ChartPanel getChart() {
return chartPanel;
}
public void createAdditionalDataset() {
seriesArrayList.add(createDataset("S" + this.datasetIndex));
this.datasetIndex++;
this.plot.setDataset(
this.datasetIndex, seriesArrayList.get(0));
this.plot.setRenderer(this.datasetIndex, new StandardXYItemRenderer());
}
public XYSeriesCollection getXYSeries(int datasetIndex) {
return seriesArrayList.get(datasetIndex);
}
public int getDatasetCount() {
return this.plot.getDatasetCount();
}
public static void main(String [] args) throws InterruptedException {
MultipleChartFactory mcf = new MultipleChartFactory("Battery","Time");
JFrame frame = new JFrame();
frame.setSize(700, 700);
JPanel panel = new JPanel();
panel.add(mcf.getChart());
frame.add(panel);
frame.setVisible(true);
// on closing window
frame.addWindowListener(new WindowAdapter() {
public synchronized void windowClosing(WindowEvent we) {
System.exit(0);
}
});
mcf.createAdditionalDataset();
mcf.createAdditionalDataset();
mcf.createAdditionalDataset();
mcf.getXYSeries(0).getSeries(0).add(1, 10);
mcf.getXYSeries(0).getSeries(0).add(2, 100);
Thread.sleep(3000);
System.out.println("first");
mcf.getXYSeries(1).getSeries(0).add(1, 20);
mcf.getXYSeries(1).getSeries(0).add(2, 200);
Thread.sleep(3000);
System.out.println("second");
mcf.getXYSeries(2).getSeries(0).add(1, 30);
mcf.getXYSeries(2).getSeries(0).add(2, 300);
}
}
Debugger stops after mcf.getXYSeries(0).getSeries(0).add(1, 10);
. I am not really understanding why it stops there.
Do you have suggestion to display every data series in the graph?
解决方案You need to use the datasetIndex
when acessing the seriesArrayList
.
public void createAdditionalDataset() {
seriesArrayList.add(createDataset("S" + this.datasetIndex));
this.plot.setDataset(this.datasetIndex, seriesArrayList.get(datasetIndex));
this.plot.setRenderer(this.datasetIndex, new StandardXYItemRenderer());
this.datasetIndex++;
}
Notes:
Program to the interface, e.g.
List<XYSeriesCollection>
.Use
pack()
on the enclosingWindow
to obtain the preferred size of components.See also Initial Threads.
SSCCE:
import java.awt.BorderLayout;
import java.awt.Color;
import java.util.ArrayList;
import java.util.List;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.StandardXYItemRenderer;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import javax.swing.*;
public class MultipleChartFactory {
private XYPlot plot;
private ChartPanel chartPanel;
private int datasetIndex = 0;
private List<XYSeriesCollection> seriesArrayList = new ArrayList<XYSeriesCollection>();
public MultipleChartFactory(String title, String xAxis) {
super();
String yAxis = title;
XYSeriesCollection dataset = createDataset("Series");
JFreeChart chart = ChartFactory.createXYLineChart("", xAxis, yAxis,
dataset, PlotOrientation.VERTICAL, false, false, false);
chart.setBackgroundPaint(Color.white);
plot = chart.getXYPlot();
plot.setBackgroundPaint(Color.lightGray);
plot.setDomainGridlinePaint(Color.white);
plot.setRangeGridlinePaint(Color.white);
ValueAxis axis = plot.getDomainAxis();
axis.setAutoRange(true);
NumberAxis rangeAxis2 = new NumberAxis("Range Axis 2");
rangeAxis2.setAutoRangeIncludesZero(false);
JPanel content = new JPanel(new BorderLayout());
chartPanel = new ChartPanel(chart);
content.add(chartPanel);
}
private XYSeriesCollection createDataset(String name) {
XYSeries series = new XYSeries(name);
return new XYSeriesCollection(series);
}
public ChartPanel getChart() {
return chartPanel;
}
public void createAdditionalDataset() {
seriesArrayList.add(createDataset("S" + this.datasetIndex));
this.plot.setDataset(this.datasetIndex, seriesArrayList.get(datasetIndex));
this.plot.setRenderer(this.datasetIndex, new StandardXYItemRenderer());
this.datasetIndex++;
}
public XYSeriesCollection getXYSeries(int datasetIndex) {
return seriesArrayList.get(datasetIndex);
}
public int getDatasetCount() {
return this.plot.getDatasetCount();
}
public static void main(String[] args) throws InterruptedException {
MultipleChartFactory mcf = new MultipleChartFactory("Battery", "Time");
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
panel.add(mcf.getChart());
frame.add(panel);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
mcf.createAdditionalDataset();
mcf.createAdditionalDataset();
mcf.createAdditionalDataset();
mcf.getXYSeries(0).getSeries(0).add(1, 10);
mcf.getXYSeries(0).getSeries(0).add(2, 100);
System.out.println("first");
mcf.getXYSeries(1).getSeries(0).add(1, 20);
mcf.getXYSeries(1).getSeries(0).add(2, 200);
System.out.println("second");
mcf.getXYSeries(2).getSeries(0).add(1, 30);
mcf.getXYSeries(2).getSeries(0).add(2, 300);
}
}
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