import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.scene.text.Text;

import java.time.LocalTime;

public class Klokke extends Application {
    Text hilsen = new Text(naa());

    class SekundTeller extends Thread {
        boolean slutt = false;

        public void run() {
            while (! slutt) {
                try {
                    sleep(1000);
                } catch (InterruptedException e) {
                    slutt = true; } 
                hilsen.setText(naa());
            }
        }
    }

    private static String naa() {
        LocalTime t = LocalTime.now();
        return String.format("%02d:%02d:%02d", t.getHour(), t.getMinute(), t.getSecond());
    }
    
    @Override
    public void start(Stage teater) {
        hilsen.setFont(new Font(100));
        VBox box = new VBox();
        box.getChildren().add(hilsen);

        Scene scene = new Scene(box);
        teater.setScene(scene);
        teater.show();
        new SekundTeller().start();

    }
    public static void main(String[] args) {
        Application.launch(args);
        System.exit(1);
    }  
}