javafx-esc关闭窗口

        primaryStage.setScene(scene);
        scene.addEventHandler(KeyEvent.KEY_PRESSED, new EventHandler<KeyEvent>() {
            @Override
            public void handle(KeyEvent t) {
                if (t.getCode() == KeyCode.ESCAPE) {
                    System.out.println("click on escape");
                    Stage sb = (Stage) primaryStage.getScene().getWindow();//use any one object
                    sb.close();
                }
            }
        });