Java Swing 애플릿에서 소켓 네트워킹을 어떻게 구현할 수 있습니까?

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

public class SwingSocketApplet implements ActionListener {
    private JFrame frame;
    private JTextField textField;
    private JTextArea textArea;
    private JButton sendButton;
    private Socket clientSocket;
    private PrintWriter out;

    public static void main(String[] args) {
        SwingSocketApplet applet = new SwingSocketApplet();
        applet.start();
    }

    public void start() {
        // Create a JFrame for GUI
        frame = new JFrame();