Java tutorial
import javafx.application.Application; import javafx.application.HostServices; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.control.Label; import javafx.stage.Modality; import javafx.stage.Stage; import javafx.stage.StageStyle; import netscape.javascript.JSObject; public class Main extends Application { public static void main(String[] args) { Application.launch(args); } @Override public void start(Stage stage) { Button openURLButton = new Button("Go!"); openURLButton.setOnAction(e -> { HostServices host = getHostServices(); JSObject js = host.getWebContext(); if (js == null) { Stage s = new Stage(StageStyle.UTILITY); s.initModality(Modality.WINDOW_MODAL); Label msgLabel = new Label("This is an FX alert!"); Group root = new Group(msgLabel); Scene scene = new Scene(root); s.setScene(scene); s.setTitle("FX Alert"); s.show(); } else { js.eval("window.alert('This is a JavaScript alert!')"); } }); Scene scene = new Scene(openURLButton); stage.setScene(scene); stage.setTitle("Knowing the Host"); stage.show(); } }