ProcessBar và ProcessIndicator trong JavaFX

package sample.Main13;

import javafx.concurrent.Task;
import javafx.fxml.FXML;
import javafx.scene.control.Label;
import javafx.scene.control.ProgressBar;
import javafx.scene.control.ProgressIndicator;
import javafx.event.ActionEvent;

public class Controller {
    @FXML
    ProgressBar progressBar;
    @FXML
    ProgressIndicator progressIndicator;
    @FXML
    Label label;
    doWork task;
    public void start (ActionEvent event){
        task = new doWork();
        progressBar.progressProperty().bind(task.progressProperty());
        progressIndicator.progressProperty().bind(task.progressProperty());
        label.textProperty().bind(task.messageProperty());
        new Thread(task).start();
    }
    public void cancel (ActionEvent event){
        task.cancel();
        progressBar.progressProperty().unbind();
        progressBar.setProgress(0);
        progressIndicator.progressProperty().unbind();
        progressIndicator.setProgress(0);
        label.textProperty().unbind();
        label.setText("ready");
    }
}
class doWork extends Task<Void>{

    @Override
    protected Void call() throws Exception {
        for (int i=0; i<10; i++){
            if (isCancelled()){
                updateMessage("Cancelled");
                break;
            }
            updateProgress(i+1,10);
            updateMessage("Loading");
            Thread.sleep(1000);
        }
        updateMessage("Finished");
        return null;
    }
}
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package sample.Main13;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class Main13 extends Application {

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        try{
            Parent root = FXMLLoader.load(this.getClass().getResource("sample.fxml"));
            Scene scene = new Scene(root);
            primaryStage.setScene(scene);
            primaryStage.show();
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}
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<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.ProgressBar?>
<?import javafx.scene.control.ProgressIndicator?>
<?import javafx.scene.layout.AnchorPane?>

<AnchorPane prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.121" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Main13.Controller">
   <children>
      <ProgressBar fx:id="progressBar" layoutX="161.0" layoutY="146.0" prefWidth="200.0" progress="0.0" />
      <ProgressIndicator fx:id="progressIndicator" layoutX="394.0" layoutY="133.0" progress="0.0" />
      <Label fx:id="label" layoutX="218.0" layoutY="93.0" prefHeight="16.0" prefWidth="61.0" text="Ready" />
      <Button layoutX="161.0" layoutY="240.0" mnemonicParsing="false" onAction="#start" text="Start" />
      <Button layoutX="248.0" layoutY="240.0" mnemonicParsing="false" onAction="#cancel" text="Cancel" />
   </children>
</AnchorPane>
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