incomplete learning rate finder plotter

Plotter.java

import java.awt.Color;
import java.awt.BasicStroke;

import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;

public class Plotter extends ApplicationFrame {
    public Plotter(String title, String chartTitle) {
        super(title);
        JFreeChart xylineChart = ChartFactory.createXYLineChart(
                chartTitle,
                "Learning Rate",
                "Train Loss",
                createDataset(),
                PlotOrientation.VERTICAL,
                true, true, false);

        ChartPanel chartPanel = new ChartPanel(xylineChart);
//        chartPanel.setPreferredSize( new java.awt.Dimension( 560 , 367 ) );
        chartPanel.setPreferredSize(new java.awt.Dimension(1280, 720));

        final XYPlot plot = xylineChart.getXYPlot();

        XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer();
        renderer.setSeriesPaint(0, Color.BLUE);
//        renderer.setSeriesPaint(1, Color.GREEN);
//        renderer.setSeriesPaint(2, Color.YELLOW);
        renderer.setSeriesStroke(0, new BasicStroke(4.0f));
//        renderer.setSeriesStroke(1, new BasicStroke(3.0f));
//        renderer.setSeriesStroke(2, new BasicStroke(2.0f));
        plot.setRenderer(renderer);
        setContentPane(chartPanel);
    }


    public static void main(String[] args) {
        Plotter chart = new Plotter("Learning Rate Finder",
                "Loss Against Learning Rate");
        chart.pack();
        RefineryUtilities.centerFrameOnScreen(chart);
        chart.setVisible(true);
    }

    private XYDataset createDataset() {
        final XYSeries exp1 = new XYSeries("Experiment1");
        exp1.add(1.0, 1.0);
        exp1.add(2.0, 4.0);
        exp1.add(3.0, 3.0);

        final XYSeriesCollection dataset = new XYSeriesCollection();
        dataset.addSeries(exp1);
        return dataset;
    }

}