如何在Javafx中按住键的同时限制键输入？

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.TextField;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class KeyInputRestrictionExample extends Application {

    @Override
    public void start(Stage primaryStage) {
        TextField textField = new TextField();
        textField.addEventFilter(KeyEvent.KEY_TYPED, event -> {
            if (event.isShiftDown()) {
                String input = event.getCharacter();
                if (!input.matches("[A-Z]")) {
                    event.consume(); // 取消输入
                }
            }
        });

        VBox root = new VBox(textField);
        Scene scene = new Scene(root, 200, 100);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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