You can see an effect on an attached movie.

Just switch on autoranging and you get labels, not fitting in the control's boundaries.

Code:


import java.util.Arrays;
import java.util.Comparator;
import java.util.Random;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.chart.BubbleChart;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;
import javafx.scene.control.ToggleButton;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;
import javafx.util.StringConverter;

public class JavaCharts extends Application {
    
    public static void main(String[] args) {
        launch(args);
    }
    NumberAxis axis1 = new NumberAxis(0, 100, 10);
    NumberAxis axis2 = new NumberAxis(0, 100, 10);
    BubbleChart chart = new BubbleChart(axis1, axis2);
    VBox vb = new VBox();
    
    @Override
    public void start(Stage stage) throws Exception {
        chart.setTitle("BubbleChart");
        chart.setStyle("-fx-border-color: darkgray;");
        
        ObservableList list = FXCollections.observableArrayList();
        int max = 100;
        int min = 30;
        
        for (int i = 0; i < 30; i++) {
            XYChart.Data newData = new XYChart.Data();
            newData.setXValue(new Random().nextDouble() * (max - min) + min);
            newData.setYValue(new Random().nextDouble() * (max - min) + min);
            newData.setExtraValue(new Random().nextDouble() * (max - min) / 4);
            
            list.add(newData);
        }
        
        Object[] array = list.toArray();
        Arrays.sort(array, new Comparator() {
            
            @Override
            public int compare(Object t, Object t1) {
                return (int) Math.round(((Double) ((XYChart.Data) t).getXValue()) - ((Double) ((XYChart.Data) t1).getXValue()));
            }
        });
        
        XYChart.Series serie = new XYChart.Series("serie", FXCollections.observableArrayList(array));
        
        chart.getData().add(serie);
        
        Pane pane = new Pane();
        pane.setPrefSize(600, 600);
        
        axis2.setTickLabelFormatter(new ChartsLabelFormatter<Number>());
        
        axis2.setTickLabelFont(new Font("Arial", 20));
        
        axis2.setLowerBound(-0.5437);
        
        ToggleButton tb = new ToggleButton("Auto ranging");
        tb.selectedProperty().bindBidirectional(axis2.autoRangingProperty());
        
        pane.setPrefSize(600, 600);
        pane.getChildren().add(chart);
        
        vb.getChildren().addAll(pane, tb);
        
        Scene scene = new Scene(vb, 700, 700);
        stage.setScene(scene);
        stage.show();
    }
    
    private static class ChartsLabelFormatter<Number> extends StringConverter<Number> {
        
        @Override
        public String toString(Number t) {
            return "Form" + t;
        }
        
        @Override
        public Number fromString(String string) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
    }
}