import javafx.application.Application;
import javafx.application.Platform;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.stage.Stage;
import java.util.Random;

public class FortuneTeller extends Application
{
    Text fortune = new Text("");
    String[] fortunes = {"Test JavaFX","PBO A","HELLO"};

    @Override
    public void start(Stage stage) throws Exception
    {
       VBox box=new VBox();
       box.setPadding(new Insets(20));
       box.setSpacing(20);
       box.setAlignment(Pos.CENTER);

       Text title=new Text("Hello Fortune Teller");
       title.setFont(Font.font("SanSerif",36));
       box.getChildren().add(title);
       Button button = new Button("Klik JavaFX");
       box.getChildren().add(button);
       box.getChildren().add(fortune);

       button.setOnAction(this::buttonClick);

       Scene scene=new Scene(box,500,250);
       stage.setTitle("Hello JavaFX");
       stage.setScene(scene);
       stage.show();
    }

    private void buttonClick(ActionEvent event)
    {
       Random rand = new Random();
       fortune.setText(fortunes[rand.nextInt(fortunes.length)]);
    }
}