PageUp in KeyCombination

package javafxapplication1;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ContextMenu;
import javafx.scene.control.MenuItem;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyCodeCombination;
import javafx.scene.input.KeyComposition;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class JavaFXApplication 1 extensions Application {

    @ Override
    public void start (Stage primaryStage) {
        // The two lines below are the same expression.
        KeyCombination copyKey=KeyCombination.valueOf("Shortcut + Page Up");
        // KeyCombination copyKey = new KeyCodeCombination (KeyCode.PAGE_UP, KeyCombination.SHORTCUT_DOWN);

        MenuItem = new MenuItem("Test";
        m.setAccelerator(copyKey);
        Button btn = new Button();
        m.setOnAction(ActionEvent)->{
            btn.fire();
        });
        ContextMenu cm = new ContextMenu(m);

        btn.setText("Say'Hello World");

        btn.setOnAction(ActionEvent)->{
            System.out.println("Hello World!");
        });

        btn.setContextMenu(cm);

        StackPane root=new StackPane();
        root.getChildren().add(btn);

        Scenescene= new Scene(root, 300, 250);
        scene.setOnKeyPressed((KeyEvent event)->{
            System.out.println(event.getCode().toString()); // CONTROL, PAGE_UP appears
        });

        primaryStage.setTitle("Hello World!");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[]args) {
        launch(args);
    }
}