import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.*;
import javafx.stage.Stage;
import javafx.scene.text.TextAlignment;
import javafx.scene.text.Font;
import javafx.geometry.Pos;
import javafx.geometry.Insets;
import javafx.scene.layout.Border;
import javafx.scene.layout.BorderStroke;
import javafx.scene.layout.BorderStrokeStyle;
import javafx.scene.layout.BorderWidths;
import javafx.scene.paint.Color;


import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.event.Event;

public class UIBspAction1 extends Application {

    
     @Override 
     public void start(Stage stage) {
            VBox root = new VBox(22);       

            Button bn = new Button("Klick mich") ;
            bn.setFont(new Font(22));
            root.getChildren().add(bn);
            bn.setOnAction(new MyEventHandler () );

            Scene scene= new Scene(root, 250, 150);
            stage.setTitle("UIBspAction1");        
            stage.setScene(scene);        
            stage.show();  
    }
     
     
      public static void main(String[] argv) {       
              launch(argv);   
      } 
}

class MyEventHandler implements EventHandler {
     //@ Override
     public void handle(Event event) {
         System.out.println("Der Schalter wurde angeklickt");
         //bn.setText("hallo");
     }   
}