Using the source code below, the button's action is never fired in Windows - the alert is not displayed.  Works fine on Mac OS X.


public class HelloButtonsJava extends Application {
    @Override
    public void start() {
        Button btn = new Button("Button");
        btn.setOnAction(new EventHandler<ActionEvent>() {
            public void handle(ActionEvent actionEvent) {
                Alert.inform("Button Clicked");
            }
        });

        VBox vBox = new VBox();
        vBox.setPadding(new Insets(10, 10, 10, 10));
        vBox.getChildren().add(btn);

        Scene scene = new Scene(vBox, 400, 400);
        Stage stage = new Stage();
        stage.setScene(scene);
        stage.setVisible(true);
    }

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