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In this JavaFX example, we will see how to create a Bar Chart using JavaFX. 

A bar chart presents grouped data with rectangular bars with lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally.

JavaFX Bar Chart Example

In the example, we use a bar chart to show the number of Olympic gold medals per country in London:

package sample;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.chart.BarChart;
import javafx.scene.chart.CategoryAxis;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage stage) {

        initUI(stage);
    }

    private void initUI(Stage stage) {

        HBox root = new HBox();

        Scene scene = new Scene(root, 480, 330);
        CategoryAxis xAxis = new CategoryAxis();

        NumberAxis yAxis = new NumberAxis();
        yAxis.setLabel("Gold medals");

        BarChart barChart = new BarChart<>(xAxis, yAxis);
        barChart.setTitle("Olympic gold medals in London");

        XYChart.Series data = new XYChart.Series<String, Number>();

        data.getData().add(new XYChart.Data<>("USA", 46));
        data.getData().add(new XYChart.Data<>("China", 38));
        data.getData().add(new XYChart.Data<>("UK", 29));
        data.getData().add(new XYChart.Data<>("Russia", 22));
        data.getData().add(new XYChart.Data<>("South Korea", 13));
        data.getData().add(new XYChart.Data<>("Germany", 11));

        barChart.getData().add(data);
        barChart.setLegendVisible(false);

        root.getChildren().add(barChart);

        stage.setTitle("BarChart");
        stage.setScene(scene);
        stage.show();

    }

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

Output:

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