The following code produces the exception given below it

public class Main1 extends Application {
 
    @Override public void start(Stage stage) {
        stage.setTitle("Scatter Chart Sample");
        final NumberAxis xAxis = new NumberAxis();
        final NumberAxis yAxis = new NumberAxis();
        final ScatterChart sc = new ScatterChart(xAxis,yAxis);

        XYChart.Series series1 = new XYChart.Series();
        series1.setName("Equities");
sc.getData().add(series1);
        series1.getData().add(new XYChart.Data(4.2, 193.2));
        series1.getData().add(new XYChart.Data(2.8, 33.6));
        series1.getData().add(new XYChart.Data(6.2, 24.8));
        series1.getData().add(new XYChart.Data(1, 14));
        series1.getData().add(new XYChart.Data(1.2, 26.4));
        series1.getData().add(new XYChart.Data(4.4, 114.4));
        series1.getData().add(new XYChart.Data(8.5, 323));
        series1.getData().add(new XYChart.Data(6.9, 289.8));
        series1.getData().add(new XYChart.Data(9.9, 287.1));
        series1.getData().add(new XYChart.Data(0.9, -9));
        series1.getData().add(new XYChart.Data(3.2, 150.8));
        series1.getData().add(new XYChart.Data(4.8, 20.8));
        series1.getData().add(new XYChart.Data(7.3, -42.3));
        series1.getData().add(new XYChart.Data(1.8, 81.4));
        series1.getData().add(new XYChart.Data(7.3, 110.3));
        series1.getData().add(new XYChart.Data(2.7, 41.2));
 
        Scene scene = new Scene(sc, 500, 400);
        stage.setScene(scene);
        stage.show();
    }
 
    public static void main(String[] args) {
        launch(args);
    }
}

Exception in thread "main" java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:399)
at com.sun.javafx.application.LauncherImpl.access$000(LauncherImpl.java:47)
at com.sun.javafx.application.LauncherImpl$1.run(LauncherImpl.java:115)
at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.RangeCheck(ArrayList.java:547)
at java.util.ArrayList.get(ArrayList.java:322)
at com.sun.javafx.collections.ObservableListWrapper.get(ObservableListWrapper.java:208)
at javafx.scene.chart.ScatterChart.updateLegend(ScatterChart.java:188)
at javafx.scene.chart.XYChart$2.onChanged(XYChart.java:132)
at com.sun.javafx.collections.ListListenerHelper$SingleChange.fireValueChangedEvent(ListListenerHelper.java:134)
at com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:48)
at com.sun.javafx.collections.ObservableListWrapper.callObservers(ObservableListWrapper.java:97)
at com.sun.javafx.collections.ObservableListWrapper.add(ObservableListWrapper.java:154)
at com.sun.javafx.collections.ObservableListWrapper.add(ObservableListWrapper.java:144)
at com.ods.infoview.Main1.start(Main1.java:24)
at com.sun.javafx.application.LauncherImpl$5.run(LauncherImpl.java:315)
at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:174)
at com.sun.javafx.application.PlatformImpl$3.run(PlatformImpl.java:141)

Tthe same code for other chart types like LineChart do not produce this error.