JFreeChart (BarChart, LineChart, PieChart) in Vaadin Flow

// Dependencies

<dependency>
    <groupId>org.jfree</groupId>
    <artifactId>jfreechart</artifactId>
    <version>1.0.19</version>
</dependency>

<dependency>
    <groupId>com.faendir.vaadin</groupId>
    <artifactId>jfreechart-flow</artifactId>
    <version>1.1.6</version>
</dependency>

// Source Code

public class JFreeChartComponent extends VerticalLayout {
        private JFreeChart jFreeChart;
        private JFreeChartWrapper jFreeChartWrapper;

        public JFreeChartComponent() {
            this.setSizeFull();
            this.jFreeChartWrapper = new JFreeChartWrapper(getPieChart());

            this.add(jFreeChartWrapper);
        }
        private JFreeChart getPieChart() {
            DefaultPieDataset dataset = new DefaultPieDataset( );
            dataset.setValue( "IPhone 5s" , new Double( 20 ) );
            dataset.setValue( "SamSung Grand" , new Double( 20 ) );
            dataset.setValue( "MotoG" , new Double( 40 ) );
            dataset.setValue( "Nokia Lumia" , new Double( 10 ) );

            JFreeChart chart = ChartFactory.createPieChart(
                    "Mobile Sales",   // chart title
                    dataset,          // data
                    true,             // include legend
                    true,
                    false);

            return chart;
        }

        private JFreeChart getMultiBarChart() {
            final String kia = "KIA";
            final String tata = "TATA";
            final String fiat = "FIAT";
            final String audi = "AUDI";
            final String ford = "FORD";
            final String speed = "Speed";
            final String millage = "Millage";
            final String userRating = "User Rating";
            final String safety = "Safety";
            final DefaultCategoryDataset dataSet = new DefaultCategoryDataset();

            dataSet.addValue(1.0, fiat, speed);
            dataSet.addValue(3.0, fiat, userRating);
            dataSet.addValue(5.0, fiat, millage);
            dataSet.addValue(5.0, fiat, safety);

            dataSet.addValue(5.0, audi, speed);
            dataSet.addValue(6.0, audi, userRating);
            dataSet.addValue(10.0, audi, millage);
            dataSet.addValue(4.0, audi, safety);

            dataSet.addValue(4.0, ford, speed);
            dataSet.addValue(2.0, ford, userRating);
            dataSet.addValue(3.0, ford, millage);
            dataSet.addValue(6.0, ford, safety);

            dataSet.addValue(1.0, kia, speed);
            dataSet.addValue(3.0, kia, userRating);
            dataSet.addValue(5.0, kia, millage);
            dataSet.addValue(5.0, kia, safety);

            dataSet.addValue(5.0, tata, speed);
            dataSet.addValue(6.0, tata, userRating);
            dataSet.addValue(10.0, tata, millage);
            dataSet.addValue(4.0, tata, safety);

            JFreeChart chart = ChartFactory.createBarChart(
                    "Bar Chart",
                    "Category",
                    "Score",
                    dataSet,
                    PlotOrientation.VERTICAL,
                    true, true, false);


            return chart;
        }
        private JFreeChart getBarChart() {
            final String kia = "KIA";
            final DefaultCategoryDataset dataSet = new DefaultCategoryDataset();

            int k = 1;
            while (k <= 31) {
                int value = k * 5;
                if (k % 2 == 0)
                    value = k * 10;
                dataSet.addValue(value, kia, String.valueOf(k));
                k++;
            }

            JFreeChart chart = ChartFactory.createBarChart(
                    "Bar Chart",
                    "Oct 2022",
                    "Score",
                    dataSet,
                    PlotOrientation.VERTICAL,
                    true, true, false);

            ChartPanel chartPanel = new ChartPanel(chart);
            chartPanel.setMouseWheelEnabled(true);
            chartPanel.setDomainZoomable(true);
            chartPanel.setRangeZoomable(true);
            chartPanel.setZoomOutFactor(1.0);
            chartPanel.setZoomInFactor(1.0);

            return chart;
//        return chartPanel;
        }

        private JFreeChart getLineChart() {
            DefaultCategoryDataset dataSet = new DefaultCategoryDataset( );
            dataSet.addValue( 15 , "schools" , "1970" );
            dataSet.addValue( 30 , "schools" , "1980" );
            dataSet.addValue( 60 , "schools" ,  "1990" );
            dataSet.addValue( 120 , "schools" , "2000" );
            dataSet.addValue( 240 , "schools" , "2010" );
            dataSet.addValue( 300 , "schools" , "2014" );

            JFreeChart lineChart = ChartFactory.createLineChart(
                    "Line Chart",
                    "Years","Number of Schools",
                    dataSet,
                    PlotOrientation.VERTICAL,
                    true,true,false);


            return lineChart;
        }

        private JFreeChart getXYLineChart() {
            XYSeriesCollection newDataSet = new XYSeriesCollection();
            XYSeries series1 = new XYSeries("Object 1");
            XYSeries series2 = new XYSeries("Object 2");
            XYSeries series3 = new XYSeries("Object 3");

            series1.add(1.0, 2.0);
            series1.add(2.0, 3.0);
            series1.add(3.0, 2.5);
            series1.add(3.5, 2.8);
            series1.add(4.2, 6.0);

            series2.add(2.0, 1.0);
            series2.add(2.5, 2.4);
            series2.add(3.2, 1.2);
            series2.add(3.9, 2.8);
            series2.add(4.6, 3.0);

            series3.add(1.2, 4.0);
            series3.add(2.5, 4.4);
            series3.add(3.8, 4.2);
            series3.add(4.3, 3.8);
            series3.add(4.5, 4.0);

            newDataSet.addSeries(series1);
            newDataSet.addSeries(series2);
            newDataSet.addSeries(series3);

            JFreeChart chart = ChartFactory.createXYLineChart("XY Line Chart", "X Axis", "Y Axis", newDataSet);
            return chart;
        }

    }