在JavaFX中使用Enter键触发按钮的onAction

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

public class EnterKeyButtonExample extends Application {

    @Override
    public void start(Stage primaryStage) {
        Button btn = new Button("Say 'Hello World'");
        btn.setOnAction(event -> System.out.println("Hello World!"));

        // 设置焦点到按钮上
        btn.requestFocus();

        // 添加键盘事件处理器
        btn.addEventFilter(KeyEvent.KEY_PRESSED, event -> {
            if (event.getCode() == KeyCode.ENTER) {
                btn.fire(); // 触发按钮的onAction事件
            }
        });

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

        Scene scene = new Scene(root, 300, 250);

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

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