src/server.java

+import java.net.*;  
+import java.io.*;  
+  
+public class Server {  
+    public static void main(String[] args) throws IOException {  
+        int port = 12345;  
+        ServerSocket serverSocket = new ServerSocket(port);  
+        System.out.println("Server started on port " + port);  
+  
+        while (true) {  
+            Socket clientSocket = serverSocket.accept();  
+            System.out.println("Client connected from " + clientSocket.getInetAddress());  
+  
+            PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);  
+            BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));  
+  
+            String inputLine;  
+            while ((inputLine = in.readLine()) != null) {  
+                System.out.println("Received message: " + inputLine);  
+                out.println("Echo: " + inputLine);  
+            }  
+  
+            out.close();  
+            in.close();  
+            clientSocket.close();  
+        }  
+    }  
+}