Creating Charts in JavaFX - JavaFX 8: A Definitive Guide to Building Desktop, Mobile, and Embedded Java Clients - page 369

Figure 8-15. Rendering area plots using AreaChart
Using the BubbleChart
The last implementation of the XYChart is a special one. The BubbleChart does not contain properties that are not
already on the XYChart class, but it is the only direct implementation in the current JavaFX Chart API that uses the
additional parameter on the XYChart.Data class.
We first modify the code in Listing 8-6 to use the BubbleChart instead of the ScatterChart . Because by default,
bubbles are stretched when the span on the xAxis is much different from the span on the yAxis , we do not use years,
but a tenth of a year as the value on the xAxis . Doing so, we have a span of 100 units on the xAxis (10 years) compared
with a span of about 30 units on the yAxis . This is also more or less the ratio between the width and the height of our
chart. As a consequence, the bubbles are relatively circular.
Listing 8-11 contains the code for rendering a BubbleChart .
Listing 8-11. Using the BubbleChart
package projavafx;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.chart.*;
import javafx.scene.chart.XYChart.Series;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.util.StringConverter;
public class ChartApp10 extends Application {
public static void main(String[] args) {
launch(args);
}