public void run() { String message; try { while ((message = reader.readLine()) != null) { System.out.println( message); tellEveryone(message); } } catch (Exception ex) { ex.printStackTrace(); } } } public void tellEveryone(String message) { for (PrintWriter writer : clientOutputStreams) { try { writer.println(message); writer.flush(); } catch (Exception ex) { ex.printStackTrace(); } } } 请在原有代码的基础上添加对应的注释

下面是针对给出代码的注释说明：

public void run() { // 程序的入口，线程启动时会自动执行该方法
    String message;
    try {
        while ((message = reader.readLine()) != null) { // 循环读取客户端发送的消息
            System.out.println(message); // 在服务器端输出客户端发送的消息
            tellEveryone(message); // 将消息发送给所有客户端
        }
    } catch (Exception ex) {
        ex.printStackTrace(); // 捕获并打印异常
    }
}

public void tellEveryone(String message) { // 将消息发送给所有客户端
    for (PrintWriter writer : clientOutputStreams) { // 遍历客户端输出流列表
        try {
            writer.println(message); // 向客户端输出流写入消息
            writer.flush(); // 立即刷新输出流
        } catch (Exception ex) {
            ex.printStackTrace(); // 捕获并打印异常
        }
    }
}

相关问题

import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.Socket; import java.util.Scanner; public class Client { public static void main(String[] args) { new Client().go();// 创建一个新的 client 对象，并调用 go() 方法 } public void go() { try { Socket sock = new Socket("127.0.0.1", 5000); InputStreamReader streamReader = new InputStreamReader(sock.getInputStream()); BufferedReader reader = new BufferedReader(streamReader); PrintWriter writer = new PrintWriter(sock.getOutputStream()); System.out.println("Connected to server."); System.out.println("请输入你想对服务端说的话:"); Thread readerThread = new Thread(new IncomingReader(reader)); readerThread.start(); Scanner userInput = new Scanner(System.in); while (true) { String message = userInput.nextLine(); writer.println(message); writer.flush(); } } catch (Exception ex) { ex.printStackTrace(); } } public class IncomingReader implements Runnable { BufferedReader reader; public IncomingReader(BufferedReader reader) { this.reader = reader; } public void run() { String message; try { while ((message = reader.readLine()) != null) { System.out.println(message); } } catch (Exception ex) { ex.printStackTrace(); } } } }请在原有代码的基础上添加对应的注释

下面是针对给出代码的注释说明：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;

public class Client {

    public static void main(String[] args) {
        new Client().go(); // 创建一个新的 client 对象，并调用 go() 方法
    }

    public void go() {
        try {
            Socket sock = new Socket("127.0.0.1", 5000); // 创建 Socket 连接到指定 IP 地址和端口号
            InputStreamReader streamReader = new InputStreamReader(sock.getInputStream()); // 创建输入流读取服务器发送的消息
            BufferedReader reader = new BufferedReader(streamReader);
            PrintWriter writer = new PrintWriter(sock.getOutputStream()); // 创建输出流向服务器发送消息
            System.out.println("Connected to server."); // 连接成功，输出提示信息
            System.out.println("请输入你想对服务端说的话:");
            Thread readerThread = new Thread(new IncomingReader(reader)); // 创建一个线程用于读取服务器发送的消息
            readerThread.start(); // 启动线程

            Scanner userInput = new Scanner(System.in); // 创建 Scanner 对象，用于读取用户输入的消息
            while (true) {
                String message = userInput.nextLine(); // 读取用户输入的消息
                writer.println(message); // 向服务器发送消息
                writer.flush(); // 立即刷新输出流
            }
        } catch (Exception ex) {
            ex.printStackTrace(); // 捕获并打印异常
        }
    }

    public class IncomingReader implements Runnable { // 该类实现 Runnable 接口，用于在新线程中读取服务器发送的消息
        BufferedReader reader;

        public IncomingReader(BufferedReader reader) {
            this.reader = reader;
        }

        public void run() {
            String message;
            try {
                while ((message = reader.readLine()) != null) { // 循环读取服务器发送的消息
                    System.out.println(message); // 输出服务器发送的消息
                }
            } catch (Exception ex) {
                ex.printStackTrace(); // 捕获并打印异常
            }
        }
    }
}

package Socker; import javax.swing.; import java.awt.; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.*; import java.net.ServerSocket; import java.net.Socket; public class Server extends JFrame { private JTextArea chatArea; private JTextField inputField; private final int port = 8000; private Socket clientSocket; private BufferedReader reader; private PrintWriter writer; public Server() { setDefaultCloseOperation(EXIT_ON_CLOSE); setTitle("这里是服务器!"); setBounds(750, 100, 800, 600); setAlwaysOnTop(true); JPanel chatPanel = new JPanel(new BorderLayout()); chatArea = new JTextArea(); chatArea.setEditable(false); JScrollPane jScrollPane = new JScrollPane(chatArea); chatPanel.add(jScrollPane, BorderLayout.CENTER); JPanel inputPanel = new JPanel(new FlowLayout()); inputField = new JTextField(50); inputField.setPreferredSize(new Dimension(100, 30)); JButton sendButton = new JButton("发送"); sendButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { sendMessage(inputField.getText()); } }); inputPanel.add(inputField); inputPanel.add(sendButton); Container container = getContentPane(); container.add(chatPanel, BorderLayout.CENTER); container.add(inputPanel, BorderLayout.SOUTH); setVisible(true); startServer(); } private void sendMessage(String text) { if (!text.isEmpty()) { String message = "【服务器】: " + text + "\n"; chatArea.append(message); inputField.setText(""); sendToClient(message); } } private void sendToClient(String message) { writer.println(message); } private void startServer() { try { ServerSocket serverSocket = new ServerSocket(port); System.out.println("服务器已启动，等待客户端连接"); clientSocket = serverSocket.accept(); System.out.println("客户端连接成功：" + clientSocket); reader = new BufferedReader(new InputStreamReader(clientSocket.getInputStream())); writer = new PrintWriter(clientSocket.getOutputStream(), true); new Thread(new ClientListener()).start(); } catch (IOException e) { e.printStackTrace(); } } private class ClientListener implements Runnable { @Override public void run() { try { String message; while ((message = reader.readLine()) != null) { chatArea.append(message + "\n"); } } catch (IOException e) { e.printStackTrace(); } finally { try { clientSocket.close(); } catch (IOException e) { e.printStackTrace(); } } } } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { new Server().startServer(); } }); } }这个代码为何无界面显示

这个代码可能无界面显示的原因是因为在主函数中创建了一个新的线程来启动服务器，但是在这个新线程中没有再次调用`setVisible(true)`方法来显示窗口。

可以将主函数的代码修改为如下所示，即在SwingUtilities.invokeLater中再次调用setVisible(true)方法，来确保界面显示正常：

public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
            Server server = new Server();
            server.setVisible(true);
            server.startServer();
        }
    });
}

这样，就可以保证在启动服务器的同时，也会正确显示界面。