KeyEvent

[campaenrico]

Ciao a tutti, non riesco a capire perchè mi dà errore in questo codice alla dichiarazione dell'EventHandler:

package esercizi.da.slide;

import java.awt.event.KeyEvent;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.input.KeyCode;
import javafx.scene.layout.TilePane;
import javafx.stage.Stage;

public class Keyboard1 extends Application {
    int counter=0;
    @Override
    public void start(Stage stage) {
        TilePane box=new TilePane();
        box.setHgap(50);
        final Button b1=new Button("Uno");
        final Button b2=new Button("Due");
        box.getChildren().addAll(b1,b2);
        
        
        EventHandler<KeyEvent> keyEventHandler =new EventHandler<KeyEvent>() {
            @Override
            public void handle(ActionEvent keyEvent) {
                if (keyEvent.getCode() == KeyCode.U) {
                    b1.fireEvent(new ActionEvent());
                    System.out.println(keyEvent.getSource()
                    +" => "+keyEvent.getTarget());
                }
            }
        };
        
        Scene scene = new Scene(box, 400, 300);
        b1.addEventHandler(KeyEvent.KEY_PRESSED, keyEventHandler);
        stage.setTitle("My JavaFX Application");
        stage.setScene(scene);
        stage.show();
        }
    
        public static void main(String[] args) {
        Application.launch(args);
        }
    }