如何在JavaFX中使用jFrame？

import javax.swing.*;

public class SwingFrame {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            JFrame frame = new JFrame("Swing JFrame");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setSize(400, 300);
            frame.setVisible(true);
        });
    }
}

import javafx.application.Application;
import javafx.embed.swing.SwingNode;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class JavaFXApp extends Application {
    @Override
    public void start(Stage primaryStage) {
        SwingNode swingNode = new SwingNode();
        SwingFrame swingFrame = new SwingFrame();
        swingNode.setContent(swingFrame);

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

        primaryStage.setScene(new Scene(root, 400, 300));
        primaryStage.setTitle("JavaFX with Swing JFrame");
        primaryStage.show();
    }

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