Java-Buddy

This example implement scheduled task, of Thread(Task), Thread(Runnable) and Timer with TimerTask. To update JavaFX UI ProgressBar.

package javafx_timertask;
import java.util.Timer;
import java.util.TimerTask;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.concurrent.Task;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.ProgressBar;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
/**
 *
 * @web http://java-buddy.blogspot.com/
 */
public class JavaFX_TimerTask extends Application {
 
 final int MAX = 100;
 
 Thread myTaskThread;
 Thread myRunnableThread;
 Timer myTimer;
 
 MyTask myTask;
 MyRunnable myRunnable;
 MyTimerTask myTimerTask;
 
 @Override
 public void start(Stage primaryStage) {
 
 myTask = new MyTask();
 ProgressBar progressBarTask = new ProgressBar();
 progressBarTask.setProgress(0);
 progressBarTask.progressProperty().bind(myTask.progressProperty());
 
 ProgressBar progressBarRunnable = new ProgressBar();
 progressBarRunnable.setProgress(0);
 myRunnable = new MyRunnable(progressBarRunnable);
 
 ProgressBar progressBarTimerTask = new ProgressBar();
 progressBarTimerTask.setProgress(0);
 myTimerTask = new MyTimerTask(progressBarTimerTask);
 
 Button btnStart = new Button("Start Task");
 btnStart.setOnAction(new EventHandler<ActionEvent>() {
 
 @Override
 public void handle(ActionEvent t) {
 myTaskThread = new Thread(myTask);
 myTaskThread.start();
 
 myRunnableThread = new Thread(myRunnable);
 myRunnableThread.start();
 
 myTimer = new Timer();
 myTimer.scheduleAtFixedRate(myTimerTask, 0, 100);
 }
 });
 
 VBox vBox = new VBox();
 vBox.setPadding(new Insets(5, 5, 5, 5));
 vBox.setSpacing(5);
 vBox.getChildren().addAll(
 new Label("Run in Thread(Task)"),
 progressBarTask,
 new Label("Run in Thread(Runnable)"),
 progressBarRunnable,
 new Label("Run in Timer and TimerTask"),
 progressBarTimerTask,
 btnStart);
 
 StackPane root = new StackPane();
 root.getChildren().add(vBox);
 
 Scene scene = new Scene(root, 300, 250);
 
 primaryStage.setTitle("java-buddy.blogspot.com");
 primaryStage.setScene(scene);
 primaryStage.show();
 }
 public static void main(String[] args) {
 launch(args);
 }
 
 class MyTask extends Task<Void>{
 
 @Override
 protected Void call() throws Exception {
 for (int i = 1; i <= MAX; i++) {
 updateProgress(i, MAX);
 Thread.sleep(100);
 }
 return null;
 }
 
 }
 
 class MyRunnable implements Runnable{
 
 ProgressBar bar;
 public MyRunnable(ProgressBar b) {
 bar = b;
 }
 @Override
 public void run() {
 for (int i = 1; i <= MAX; i++) {
 
 final double update_i = i;
 
 //Not work if update JavaFX UI here!
 //bar.setProgress(i/MAX);
 
 //Update JavaFX UI with runLater() in UI thread
 Platform.runLater(new Runnable(){
 @Override
 public void run() {
 bar.setProgress(update_i/MAX);
 }
 });
 
 try {
 Thread.sleep(100);
 } catch (InterruptedException ex) {
 Logger.getLogger(JavaFX_TimerTask.class.getName()).log(Level.SEVERE, null, ex);
 }
 }
 }
 
 }
 
 class MyTimerTask extends TimerTask{
 ProgressBar bar;
 double count;
 public MyTimerTask(ProgressBar b) {
 bar = b;
 count = 0;
 }
 @Override
 public void run() {
 bar.setProgress(count++/MAX);
 
 if(count >= MAX){
 myTimer.cancel();
 }
 
 }
 
 }
 
}

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