JavaFX Charts

BarChartApp.java

import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
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.chart.XYChart.Data;
import javafx.scene.control.Label;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

/**
 * https://stackoverflow.com/a/78568588/230513
 */
public class BarChartApp extends Application {

    final static String austria = "Austria";
    final static String brazil = "Brazil";
    final static String france = "France";
    final static String italy = "Italy";
    final static String usa = "USA";

    @Override
    public void start(Stage stage) {
        final CategoryAxis xAxis = new CategoryAxis();
        final NumberAxis yAxis = new NumberAxis();
        final BarChart<String, Number> chart = new BarChart<>(xAxis, yAxis);
        chart.setTitle("Country Summary");
        xAxis.setLabel("Country");
        yAxis.setLabel("Value");

        XYChart.Series<String, Number> series1 = new XYChart.Series<>();
        series1.setName("2003");
        series1.getData().add(new XYChart.Data<>(austria, 25601.34));
        series1.getData().add(new XYChart.Data<>(brazil, 20148.82));
        series1.getData().add(new XYChart.Data<>(france, 10000));
        series1.getData().add(new XYChart.Data<>(italy, 35407.15));
        series1.getData().add(new XYChart.Data<>(usa, 12000));

        XYChart.Series<String, Number> series2 = new XYChart.Series<>();
        series2.setName("2004");
        series2.getData().add(new XYChart.Data<>(austria, 57401.85));
        series2.getData().add(new XYChart.Data<>(brazil, 41941.19));
        series2.getData().add(new XYChart.Data<>(france, 45263.37));
        series2.getData().add(new XYChart.Data<>(italy, 117320.16));
        series2.getData().add(new XYChart.Data<>(usa, 14845.27));

        XYChart.Series<String, Number> series3 = new XYChart.Series<>();
        series3.setName("2005");
        series3.getData().add(new XYChart.Data<>(austria, 45000.65));
        series3.getData().add(new XYChart.Data<>(brazil, 44835.76));
        series3.getData().add(new XYChart.Data<>(france, 18722.18));
        series3.getData().add(new XYChart.Data<>(italy, 17557.31));
        series3.getData().add(new XYChart.Data<>(usa, 92633.68));

        chart.getData().add(series1);
        chart.getData().add(series2);
        chart.getData().add(series3);

        var clicked = new SimpleStringProperty();
        clicked.set("Click a Bar.");
        for (XYChart.Series<String, Number> series : chart.getData()) {
            for (Data<String, Number> data : series.getData()) {
                data.getNode().setOnMouseClicked((var t) -> {
                    clicked.set("Series: " + series.getName() + ", "
                        + data.getXValue() + " = " + data.getYValue());
                });
            }
        }

        var root = new BorderPane(chart);
        var label = new Label();
        label.textProperty().bind(clicked);
        label.setStyle("-fx-font-size: 18; -fx-padding: 5");
        root.setBottom(new StackPane(label));

        stage.setTitle("Bar Chart Sample");
        stage.setScene(new Scene(root, 800, 600));
        stage.show();
    }

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

BarChartJFCFX.java

import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.entity.CategoryItemEntity;
import org.jfree.chart.entity.ChartEntity;
import org.jfree.chart.fx.ChartViewer;
import org.jfree.chart.fx.interaction.ChartMouseEventFX;
import org.jfree.chart.fx.interaction.ChartMouseListenerFX;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;

/**
 * https://stackoverflow.com/q/78567687/230513
 */
public class BarChartJFCFX extends Application {
    
    @Override
    public void start(Stage stage) {
        var chartViewer = new ChartViewer();
        var handler = new Handler(chartViewer);
        var label = new Label();
        label.setStyle("-fx-font-size: 18; -fx-padding: 5");
        label.textProperty().bind(handler.clickedProperty());
        var root = new StackPane(chartViewer);
        root.getChildren().add(label);
        StackPane.setAlignment(label, Pos.TOP_RIGHT);
        
        Scene scene = new Scene(root, 640, 480);
        stage.setTitle("BarChart JFreeChart FX");
        stage.setScene(scene);
        stage.show();
    }
    
    private static final class Handler {
        
        private static final String PROMPT = "Click on a bar.";
        private final StringProperty clicked;
        
        public StringProperty clickedProperty() {
            return clicked;
        }
        
        public Handler(ChartViewer view) {
            this.clicked = new SimpleStringProperty(PROMPT);
            view.setChart(createChart(createDataset()));
            view.addChartMouseListener(new ChartMouseListenerFX() {
                @Override
                public void chartMouseClicked(ChartMouseEventFX e) {
                    ChartEntity ce = e.getEntity();
                    if (ce instanceof CategoryItemEntity cie) {
                        var data = cie.getDataset();
                        var rowKey = cie.getRowKey();
                        var colKey = cie.getColumnKey();
                        var value = data.getValue(rowKey, colKey);
                        clicked.set(rowKey + ", " + colKey + " = " + value);
                    } else {
                        clicked.set(PROMPT);
                    }
                }
                
                @Override
                public void chartMouseMoved(ChartMouseEventFX event) {
                }
            });
        }
        
        private static JFreeChart createChart(CategoryDataset dataset) {
            var chart = ChartFactory.createBarChart(
                "Bar Chart", "Category", "Value", dataset,
                PlotOrientation.VERTICAL, true, true, false
            );
            return chart;
        }
        
        private static CategoryDataset createDataset() {
            // row keys...
            var series1 = "Series 1";
            var series2 = "Series 2";
            // column keys...
            var category1 = "Category 1";
            var category2 = "Category 2";
            var category3 = "Category 3";
            var dataset = new DefaultCategoryDataset();
            dataset.addValue(1.0, series1, category1);
            dataset.addValue(4.0, series1, category2);
            dataset.addValue(3.0, series1, category3);
            dataset.addValue(5.0, series2, category1);
            dataset.addValue(7.0, series2, category2);
            dataset.addValue(6.0, series2, category3);
            return dataset;
        }
    }
    
    public static void main(String[] args) {
        launch(args);
    }
}