Java Web Start Swing App如何显示servlet信息？

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;

public class ServletInfoApp extends JFrame {
    private JTextArea textArea;

    public ServletInfoApp() {
        setTitle("Servlet Info App");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(400, 300);

        textArea = new JTextArea();
        textArea.setEditable(false);
        JScrollPane scrollPane = new JScrollPane(textArea);
        getContentPane().add(scrollPane, BorderLayout.CENTER);

        JButton button = new JButton("Get Servlet Info");
        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                try {
                    URL servletUrl = new URL("http://example.com/servlet");
                    HttpURLConnection connection = (HttpURLConnection) servletUrl.openConnection();
                    connection.setRequestMethod("GET");

                    BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                    StringBuilder response = new StringBuilder();
                    String line;
                    while ((line = reader.readLine()) != null) {
                        response.append(line);
                        response.append("\n");
                    }
                    reader.close();

                    textArea.setText(response.toString());
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        });
        getContentPane().add(button, BorderLayout.SOUTH);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                ServletInfoApp app = new ServletInfoApp();
                app.setVisible(true);
            }
        });
    }
}