Java-Buddy

package javafx_task;
import javafx.application.Application;
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_Task extends Application {
 @Override
 public void start(Stage primaryStage) {
 final Task task;
 task = new Task<Void>() {
 @Override
 protected Void call() throws Exception {
 int max = 50;
 for (int i = 1; i <= max; i++) {
 if (isCancelled()) {
 break;
 }
 updateProgress(i, max);
 updateMessage(String.valueOf(i));
 Thread.sleep(100);
 }
 return null;
 }
 };
 ProgressBar progressBar = new ProgressBar();
 progressBar.setProgress(0);
 progressBar.progressProperty().bind(task.progressProperty());
 
 Label labelCount = new Label();
 labelCount.textProperty().bind(task.messageProperty());
 
 final Label labelState = new Label();
 
 Button btnStart = new Button("Start Task");
 btnStart.setOnAction(new EventHandler<ActionEvent>() {
 @Override
 public void handle(ActionEvent t) {
 new Thread(task).start();
 }
 });
 
 Button btnReadTaskState = new Button("Read Task State");
 btnReadTaskState.setOnAction(new EventHandler<ActionEvent>() {
 @Override
 public void handle(ActionEvent t) {
 labelState.setText(task.getState().toString());
 }
 });
 
 VBox vBox = new VBox();
 vBox.setPadding(new Insets(5, 5, 5, 5));
 vBox.setSpacing(5);
 vBox.getChildren().addAll(
 progressBar, 
 labelCount,
 btnStart,
 btnReadTaskState, 
 labelState);
 
 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);
 }
}