JavaFX 29. Multiple Line Chart

MainController.java

package application;
 
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.chart.LineChart;
import javafx.scene.chart.XYChart;
 
public class MainController {
    @FXML LineChart<String, Number> lineChart;
    
    public void btn(ActionEvent event) {
        lineChart.getData().clear();
        XYChart.Series<String, Number> series = new XYChart.Series<String, Number>();
        series.getData().add(new XYChart.Data<String, Number>("Jan", 200));
        series.getData().add(new XYChart.Data<String, Number>("Feb", 500));
        series.getData().add(new XYChart.Data<String, Number>("Mar", 300));
        series.getData().add(new XYChart.Data<String, Number>("Apr", 600));
        series.setName("Pay 1");
        
        XYChart.Series<String, Number> series1 = new XYChart.Series<String, Number>();
        series1.getData().add(new XYChart.Data<String, Number>("Jan", 400));
        series1.getData().add(new XYChart.Data<String, Number>("Feb", 100));
        series1.getData().add(new XYChart.Data<String, Number>("Mar", 800));
        series1.getData().add(new XYChart.Data<String, Number>("Apr", 500));
        series1.setName("Pay 2");
        
        XYChart.Series<String, Number> series2 = new XYChart.Series<String, Number>();
        series2.getData().add(new XYChart.Data<String, Number>("Jan", 500));
        series2.getData().add(new XYChart.Data<String, Number>("Feb", 900));
        series2.getData().add(new XYChart.Data<String, Number>("Mar", 450));
        series2.getData().add(new XYChart.Data<String, Number>("Apr", 650));
        series2.setName("Pay 3");
        
        lineChart.getData().addAll(series, series1, series2);
    }
}