import io.reactivex.Observable;

import io.reactivex.rxjavafx.observers.JavaFxObserver;

import io.reactivex.rxjavafx.schedulers.JavaFxScheduler;

import javafx.application.Application;

import javafx.beans.binding.Binding;

import javafx.scene.Scene;

import javafx.scene.control.Label;

import javafx.scene.layout.Pane;

import javafx.stage.Stage;

import java.util.concurrent.TimeUnit;

public final class Ch9_05 extends Application {

/*

Before running this application, make sure to do these two steps:

1) Download JavaFX SDK for your OS (from https://gluonhq.com/products/javafx/)

and unzip it in any directory.

2) Assuming you have unzipped JavaFX SDK into the folder /path/JavaFX/,

add the following options to the Java command that launches this class:

--module-path /path/JavaFX/lib

--add-modules=javafx.controls,javafx.fxml

--add-exports javafx.base/com.sun.javafx.binding=ALL-UNNAMED

If you run it from IDE, add these VM options to Run Configuration.

Use JRE 9.* to execute this example since JRE 1.8 does not have these options.

*/

public static void main(String... args) {

launch(args);

}

@Override

public void start(Stage stage) {

Pane root = new Pane();

Label label = new Label("0");

label.setScaleX(2.00);

label.setScaleY(2.00);

label.relocate(40, 40);

root.getChildren().addAll(label);

Scene scene = new Scene(root, 100, 100);

stage.setScene(scene);

stage.show();

setBinding(label);

}

private static void setBinding(Label label){

Observable<String> seconds =

Observable.interval(1, TimeUnit.SECONDS)

.map(i -> i.toString())

.observeOn(JavaFxScheduler.platform());

Binding<String> binding = JavaFxObserver.toBinding(seconds);

label.textProperty().bind(binding);

}

}