improved comments, also report to client what connection number they were

projects/TcpExample2/src/tcpexample2/TcpExample2.java

-
 package tcpexample2;
 
 import java.io.*;
@@ -16,7 +15,7 @@ import java.net.*;
  * If you're sophisticated you can contact the instructor's computer
  * while running this program.
  * 
- * telnet <ipOfServersLaptop> 2317
+ * <code>telnet ipOfServersLaptop 2317</code>
  * 
  * And have him display the socket pairs he got.
  * @author mcgredo
@@ -34,7 +33,8 @@ public class TcpExample2
 			
 			int connectionCount = 0; // state
             
-            ServerSocket serverSocket = new ServerSocket(2317);
+            ServerSocket serverSocket = new ServerSocket(2317); // server decides here what port to listen on.
+			// of interest: often client doesn't care what port it uses locally when connecting to that server port.
 
             // Loop, infinitely, waiting for client connections.
             // Stop the program somewhere else.
@@ -49,27 +49,28 @@ public class TcpExample2
 
 				        ps.println("This client response was written by server TcpExample2"); // to remote client
 				System.out.println("This server response was written by server TcpExample2"); // to server console
+				
+				ps.println("You were connection #" + connectionCount + ", by my count");
                 
                 // Print some information locally about the Socket
                 // connection. This includes the port and IP numbers
                 // on both sides (the socket pair.)
                 
-                InetAddress localAddress = clientConnection.getLocalAddress();
+                InetAddress  localAddress = clientConnection.getLocalAddress();
                 InetAddress remoteAddress = clientConnection.getInetAddress();
                 
-                int localPort = clientConnection.getLocalPort();
-                int remotePort = clientConnection.getPort();
+                int  localPort = clientConnection.getLocalPort();
+                int remotePort = clientConnection.getPort();       // remember the prior question, why are 2 ports different?
                 
                 // My socket pair connection looks like this, to localhost:
-                // Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54876 ))
+                // Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54876 )) note IPv6
                 // Socket pair: (( /0:0:0:0:0:0:0:1, 2317 ), ( /0:0:0:0:0:0:0:1, 54881 ))
                 //
                 // Why is the first IP/port the same, while the second set has
                 // different ports?
 
-
                 System.out.println("Socket pair: (( " + localAddress.toString() + ", " + localPort + " ), ( " + 
-                        remoteAddress.toString() + ", " + remotePort + " ))");
+                                    remoteAddress.toString() + ", " + remotePort + " ))");
                 
                 System.out.println("got another connection, #" + connectionCount); // report progress
 				
@@ -85,7 +86,5 @@ public class TcpExample2
         {
             System.out.println("problem with networking: " + e);
         }
-       
     }
-    
 }