Beaux diagrammes ?

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.chart.*;
import javafx.stage.Stage;

public class BarChart extends Application {

    @Override
    public void start(Stage stage) {
        XYChart.Series<String, Number> serie = new XYChart.Series<>();
        serie.setName("My Serie");
        serie.getData().add(new XYChart.Data<>("A", 3));
        serie.getData().add(new XYChart.Data<>("B", 5));
        serie.getData().add(new XYChart.Data<>("C", 2));
        serie.getData().add(new XYChart.Data<>("D", 4));

        BarChart<String, Number> barChart = new BarChart<>(new CategoryAxis(), new NumberAxis());
        Scene scene = new Scene(barChart, 500, 400);
        barChart.getData().add(serie);
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}