帮我用用JavaSocket编程实现白板程序

好的，以下是一个简单的JavaSocket白板程序的实现：

1. 服务器端的实现：

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class WhiteboardServer extends JFrame {
    private static final long serialVersionUID = -2440534260699815775L;

    private final List<Point> points = new ArrayList<>();
    private final JPanel panel;
    private final ServerSocket serverSocket;

    public WhiteboardServer() throws IOException {
        super("Whiteboard Server");
        panel = new JPanel() {
            private static final long serialVersionUID = -116422336173639844L;

            @Override
            protected void paintComponent(Graphics g) {
                super.paintComponent(g);
                g.setColor(Color.BLACK);
                for (int i = 0; i < points.size() - 1; i++) {
                    Point p1 = points.get(i);
                    Point p2 = points.get(i + 1);
                    g.drawLine(p1.x, p1.y, p2.x, p2.y);
                }
            }
        };
        panel.setBackground(Color.WHITE);
        add(panel);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setSize(800, 600);
        setVisible(true);
        serverSocket = new ServerSocket(8000);
        while (true) {
            System.out.println("Waiting for a client to connect...");
            Socket socket = serverSocket.accept();
            System.out.println("Client connected from " + socket.getInetAddress().getHostAddress());
            new WhiteboardServerThread(socket).start();
        }
    }

    private class WhiteboardServerThread extends Thread {
        private final Socket socket;

        public WhiteboardServerThread(Socket socket) {
            this.socket = socket;
        }

        @Override
        public void run() {
            try {
                while (true) {
                    int x = socket.getInputStream().read();
                    int y = socket.getInputStream().read();
                    System.out.println("Received point: " + x + ", " + y);
                    points.add(new Point(x, y));
                    panel.repaint();
                }
            } catch (IOException e) {
                System.err.println("Error reading from client: " + e.getMessage());
            }
        }
    }

    public static void main(String[] args) throws IOException {
        new WhiteboardServer();
    }
}

2. 客户端的实现：

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.IOException;
import java.net.Socket;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class WhiteboardClient extends JFrame {
    private static final long serialVersionUID = -2440534260699815775L;

    private final JPanel panel;
    private final Socket socket;

    public WhiteboardClient() throws IOException {
        super("Whiteboard Client");
        panel = new JPanel() {
            private static final long serialVersionUID = -116422336173639844L;

            @Override
            protected void paintComponent(Graphics g) {
                super.paintComponent(g);
                g.setColor(Color.BLACK);
                g.drawLine(0, 0, getWidth(), getHeight());
                g.drawLine(0, getHeight(), getWidth(), 0);
            }
        };
        panel.setBackground(Color.WHITE);
        panel.addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                try {
                    socket.getOutputStream().write(e.getX());
                    socket.getOutputStream().write(e.getY());
                    System.out.println("Sent point: " + e.getX() + ", " + e.getY());
                } catch (IOException ex) {
                    System.err.println("Error sending point: " + ex.getMessage());
                }
            }
        });
        add(panel);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setSize(800, 600);
        setVisible(true);
        socket = new Socket("localhost", 8000);
    }

    public static void main(String[] args) throws IOException {
        new WhiteboardClient();
    }
}

这个白板程序的实现比较简单，服务器端和客户端通过Socket进行通信，当鼠标在客户端的面板上按下时，客户端会发送该点的坐标信息给服务器端，服务器端接收到该信息后，将该点的坐标加入到点列表中，并更新服务器端面板的绘制。