Dis Practical-7

import java.io.*; 
import java.net.*; 
public class Echoserver { 
    public static void main(String[] args) { 
        int port = 12345; // Port number for the server 
        try (ServerSocket serverSocket = new ServerSocket(port)) { 
            System.out.println("Echo Server is running on port " + port); 
             while (true) { 
                try (Socket clientSocket = serverSocket.accept()) { 
                    System.out.println("Client connected: " + clientSocket.getInetAddress()); 
                    handleClient(clientSocket); 
                } catch (IOException e) { 
                    System.out.println("Error handling client: " + e.getMessage()); 
                } 
            } 
        } catch (IOException e) { 
            System.out.println("Error starting server: " + e.getMessage()); 
        } 
    } 
 private static void handleClient(Socket clientSocket) { 
        try (BufferedReader in = new BufferedReader(new 
InputStreamReader(clientSocket.getInputStream())); 
             PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true)) { 
              String inputLine; 
            while ((inputLine = in.readLine()) != null) { 
                System.out.println("Received: " + inputLine); 
                out.println(inputLine); // Echo back the received message 
            } 
        } catch (IOException e) {
        } 
    } 
}

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

public class Echoclient {
    public static void main(String[] args) {
        String hostname = "localhost"; // Server hostname
        int port = 12345; // Server port number
        try (Socket socket = new Socket(hostname, port);
                PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
                BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

                BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in))) {
            System.out.println("Connected to the Echo Server. Type messages to send:");
            String userInput;
            while ((userInput = stdIn.readLine()) != null) {
                out.println(userInput); // Send user input to the server
                String response = in.readLine(); // Read the echoed response from the server
                System.out.println("Echo from server: " + response);
            }
        } catch (IOException e) {
            System.out.println("Error in client: " + e.getMessage());
        }
    }
}