java开发即时聊天工具

基于引用内容，可以使用Java开发一个即时聊天工具。以下是一个简单的示例：

import java.io.*;
import java.net.*;

public class ChatServer {
    public static void main(String[] args) {
        try {
            ServerSocket serverSocket = new ServerSocket(1234);
            System.out.println("Server started. Waiting for clients...");

            Socket clientSocket = serverSocket.accept();
            System.out.println("Client connected.");

            BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
            PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);

            String message;
            while ((message = in.readLine()) != null) {
                System.out.println("Client: " + message);
                out.println("Server: " + message);
            }

            in.close();
            out.close();
            clientSocket.close();
            serverSocket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import java.io.*;
import java.net.*;
import java.util.Scanner;

public class ChatClient {
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("localhost", 1234);
            System.out.println("Connected to server.");

            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            PrintWriter out = new PrintWriter(socket.getOutputStream(), true);

            Scanner scanner = new Scanner(System.in);
            String message;
            while (true) {
                System.out.print("Client: ");
                message = scanner.nextLine();
                out.println(message);

                if (message.equals("bye")) {
                    break;
                }

                System.out.println("Server: " + in.readLine());
            }

            in.close();
            out.close();
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

这是一个简单的基于Socket的即时聊天工具示例，其中包括一个服务器端和一个客户端。服务器端监听指定端口，客户端连接到服务器端后可以发送消息并接收服务器端的回复。