Minor changes

src/main/java/iterative/Client.java

@@ -8,7 +8,7 @@ class Client {
         String sentence;
         String modifiedSentence;
 
-        // input stream initialization (from user keyboard)
+        /* Initialize input stream (from user keyboard) */
         BufferedReader inFromUser =
                 new BufferedReader(new InputStreamReader(System.in));
 
@@ -17,24 +17,26 @@ class Client {
 			6789: server service port number */
         Socket clientSocket = new Socket("localhost", 6789);
 
-        // output stream towards socket initialization
+        /* Initialize output stream towards the socket */
         DataOutputStream outToServer =
                 new DataOutputStream(clientSocket.getOutputStream());
 
-        // input stream from socket initialization
+        /* Initialize input stream from the socket */
         BufferedReader inFromServer =
                 new BufferedReader(
                         new InputStreamReader(clientSocket.getInputStream()));
 
-        // read a line from the user
+        /* Read an input line */
         sentence = inFromUser.readLine();
 
-        // send the line to the server
+        /* Send the line to the server*/
         outToServer.writeBytes(sentence + '\n');
 
-        // read the response from the server
+        /* Read response from the server (string ending with '\n') */
         modifiedSentence = inFromServer.readLine();
         System.out.println("FROM SERVER: " + modifiedSentence);
+
+        /* Close the socket */
         clientSocket.close();
     }
 }

src/main/java/iterative/IterativeServer.java

@@ -8,34 +8,39 @@ class IterativeServer {
         String clientSentence;
         String capitalizedSentence;
 
-        // create a "listening socket" on the specified port
+        /* Create a "listening socket" on the specified port */
         ServerSocket welcomeSocket = new ServerSocket(6789);
 
         while(true) {
-			/*	accept is a blocking call
-				once a new connection arrived, it creates
-				a new "established socket"	*/
+            /*
+             * Call to accept function (blocking call).
+             * When a new connection arrives a new "established socket" is created
+             */
             Socket connectionSocket = welcomeSocket.accept();
 
-            // input stream from the socket initialization
+            /* Initialize input stream from the socket */
             BufferedReader inFromClient =
                     new BufferedReader(
                             new InputStreamReader(connectionSocket.getInputStream()));
 
-            // output stream to the socket initialization
+            /* Initialize output stream towards the socket */
             DataOutputStream outToClient =
                     new DataOutputStream(connectionSocket.getOutputStream());
 
-            // read a line (that terminates with \n) from the client
+            /* Read a line (ending with '\n') from the client */
             clientSentence = inFromClient.readLine();
 
-            // wait for 10 seconds
+            /* simulate a processing time of 10 seconds*/
             //Thread.sleep(10000);
 
+            /* Build the response */
             capitalizedSentence = clientSentence.toUpperCase() + '\n';
 
-            // send the response to the client
+            /* Send the response to the client */
             outToClient.writeBytes(capitalizedSentence);
+
+            /* Close the connection socket */
+            connectionSocket.close();
         }
     }
 }