improved diagnostics, comments

projects/TcpExample3/Client/TcpClient/src/tcpclient/TcpClient.java

@@ -5,8 +5,8 @@ import java.io.*;
 import java.net.*;
 
 /**
- * Before, we always used telnet to connect to the server. We
- * are now writing our own program to do the connection.
+ * Before, we always used telnet to connect to the server.
+ * Here we are now writing our own program to do the connection.
  * 
  * As you will see, when we run this after we start the server
  * we will see the same string telnet printed, sent by the server.
@@ -17,11 +17,14 @@ import java.net.*;
  */
 public class TcpClient {
 
+	public final static String LOCALHOST = "0:0:0:0:0:0:0:1"; // String constant, i.e. 127.0.0.1
   
     public static void main(String[] args) 
     {
         try
         {
+          while(true)
+          {
            System.out.println("creating socket");
            
            // We request an IP to connect to ("localhost") and
@@ -29,7 +32,7 @@ public class TcpClient {
            // a connection to that IP in the form of the Socket
            // object; the server uses a ServerSocket to wait for
            // connections.
-           Socket socket = new Socket("localhost", 2317); 
+           Socket socket = new Socket(LOCALHOST, 2317); // locohost?
            
            // Read the single line written by the server. We'd
            // do things a bit differently if many lines to be read
@@ -39,15 +42,19 @@ public class TcpClient {
            BufferedReader br = new BufferedReader(isr);
            
            String serverMessage = br.readLine();
+           System.out.println("==================================================");
+           System.out.println("Now we're talking!");
            System.out.println("The message the server sent was " + serverMessage);
-           
+		   // socket gets closed, either automatically/silently this code (or possibly by server)
+		 } // end while(true)
         }
-        catch(Exception e)
+        catch(IOException e)
         {
+            System.out.println("Problem with client: "); // describe what is happening
             System.out.println(e);
-            System.out.println("Problem with client");
         }
-
+		// program exit: tell somebody about that
+		System.out.println("client exit");
     }
     
 }