JavaFX Scatter Chart

by Online Tutorials Library July 14, 2022

JavaFX ScatterChart

In Scatter Chart, the data points are scattered along the graph. Each data point displays the mapping between both the axis. It is mainly used to plot the relationship between the axes. As in the following image, the variation in the temperature over a year is shown. On the X-axis, the month number is plotted while, on the Y-axis, the temperature is plotted (in Degree Celsius).

JavaFX ScatterChart1

In JavaFX, the Scatter Chart is represented by the class javafx.scene.chart.ScatterChart class. We need to instantiate this class in order to create the scatter chart.

Constructors

There are two constructors in the class.

public ScatterChart(Axis Xaxis, Axis Yaxis) : creates the new instance of scatter chart with the specified axis.
public ScatterChart(Axis Xaxis, Axis Yaxis, ObservableListdata): creates the new instance of Scatter Chart with the specified axis and data.

Example

In the following example, we have shown the perfect height according to the weight of the people. The data shown in the chart is logically correct.

  package application;  import javafx.application.Application;  import javafx.scene.Group;  import javafx.scene.Scene;  import javafx.scene.chart.NumberAxis;  import javafx.scene.chart.ScatterChart;  import javafx.scene.chart.XYChart;  import javafx.stage.Stage;  public class ScatterChartExample extends Application{    @Override  public void start(Stage primaryStage) throws Exception {  // TODO Auto-generated method stub  //Configuring Xaxis and Yaxis  NumberAxis xaxis = new NumberAxis(35,105,5);  NumberAxis yaxis = new NumberAxis(1,2.2,0.1);  xaxis.setLabel(“Weight”);  yaxis.setLabel(“Height”);    //Configuring ScatterChart   ScatterChart s = new ScatterChart(xaxis,yaxis);  s.setTitle(“Perfect height according to your weight”);    //Configuring Series and adding data to the series    XYChart.Series series = new XYChart.Series();  series.setName(“Height value”);  series.getData().add(new XYChart.Data(40,1.27));  series.getData().add(new XYChart.Data(45,1.35));  series.getData().add(new XYChart.Data(50,1.42));  series.getData().add(new XYChart.Data(55,1.49));  series.getData().add(new XYChart.Data(60,1.55));  series.getData().add(new XYChart.Data(65,1.62));  series.getData().add(new XYChart.Data(70,1.68));  series.getData().add(new XYChart.Data(75,1.74));  series.getData().add(new XYChart.Data(80,1.79));  series.getData().add(new XYChart.Data(85,1.85));  series.getData().add(new XYChart.Data(90,1.90));  series.getData().add(new XYChart.Data(95,1.95));  series.getData().add(new XYChart.Data(100,2.1));    //Adding series to the ScatterChart  s.getData().add(series);    //Configuring group and Scene   Group root = new Group();  root.getChildren().add(s);  Scene scene = new Scene(root,600,400);  primaryStage.setScene(scene);  primaryStage.setTitle(“ScatterChart Example”);  primaryStage.show();      }  public static void main(String[] args) {  launch(args);  }    }  

JavaFX ScatterChart2

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Constructors

Example

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External JavaScript File

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