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(); } } } }
Tuesday, February 25, 2014
Update JavaFX UI in scheduled task, of Thread(Task), Thread(Runnable) and Timer with TimerTask
This example implement scheduled task, of Thread(Task), Thread(Runnable) and Timer with TimerTask. To update JavaFX UI ProgressBar.
Subscribe to:
Post Comments (Atom)
HI, this helped a lot, thanks for sharing!
ReplyDeleteIs not neccessary to update JavaFX UI with runLater in MyTimerTask.run() as in MyRunnable.run() ?
ReplyDeleteThank you for this hint!
ReplyDeletethank you it is very halfull
ReplyDeleteHello, I liked your tutorial, congratulations to the super blog !!!.
ReplyDeleteMy question is, how can I impregnate the idea of progressbar in a method where the button recognizes the method through the scenebuilder?