如何在javafx中处理KeyEvent

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class KeyEventExample extends Application {

    @Override
    public void start(Stage primaryStage) {
        Button button = new Button("Click Me");
        button.setOnKeyPressed(event -> handleKeyEvent(event));

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

        Scene scene = new Scene(root, 300, 200);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private void handleKeyEvent(KeyEvent event) {
        // 获取按下的键码
        System.out.println("Key Code: " + event.getCode());

        // 获取按下的字符
        System.out.println("Character: " + event.getCharacter());

        // 执行相应的操作或逻辑
        // ...

        // 示例：按下Esc键时关闭应用程序
        if (event.getCode().equals(KeyCode.ESCAPE)) {
            System.exit(0);
        }
    }

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