java - JFreeChart を使用して XYPlot で複数のシリーズを作成する際の問題

Question

次のコード例では、データ系列が 1 つだけのグラフを作成します。他の 2 つのデータ系列は作成されません。

main() メソッドにはデータ系列が含まれています。

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);
    }
}

の後にデバッガが停止しmcf.getXYSeries(0).getSeries(0).add(1, 10);ます。なぜそれがそこで止まるのか、私にはよくわかりません。

グラフにすべてのデータ系列を表示する提案はありますか?