diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Mahan_Client.java b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Mahan_Client.java
new file mode 100644
index 0000000000000000000000000000000000000000..a3bc4bc62668dd67bd48c7cd79a86b97979e4a0a
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Mahan_Client.java
@@ -0,0 +1,81 @@
+package MV3500Cohort2020JulySeptember.homework2.Mahan;
+
+import java.io.*;
+import java.net.*;
+/**
+ *
+ * @author Bill
+ */
+public class Mahan_Client {
+
+ // IPv6 String constant for localhost address, similarly IPv4 127.0.0.1
+ public final static String LOCALHOST = "0:0:0:0:0:0:0:1";
+
+ public static void main(String[] args) {
+
+ // Local vars/fields
+ Socket socket;
+ InputStream is;
+ InputStreamReader isr;
+ BufferedReader br;
+ String serverMessage;
+ Integer count = 0;
+
+ OutputStream os;
+ PrintStream ps;
+
+
+ try {
+ while (true) {
+ System.out.println("TcpExample3Client creating socket...");
+
+ // We request an IP to connect to ("localhost") and
+ // port number at that IP (2317). This establishes
+ // a connection to that IP in the form of a Socket
+ // object; the server uses a ServerSocket to wait for
+ // connections.
+ socket = new Socket(LOCALHOST, 2317); // locohost?
+
+ // Now hook everything up (i.e. set up the streams), Java style:
+ is = socket.getInputStream();
+ isr = new InputStreamReader(is);
+ br = new BufferedReader(isr);
+
+
+ // Read a single line written by the server. We'd
+ // do things a bit differently if there were many lines to be read
+ // from the server instead of one only.
+ serverMessage = br.readLine();
+ System.out.println("==================================================");
+ System.out.println("'Knock, knock,' says the MahanClient.");
+ System.out.println("The MahanServer responds by saying: '" + serverMessage + "'");
+ System.out.println("A frustrated MahanClient responds, 'Answer your door! I have knocked "+ count +" times.");
+ count++;
+ // socket gets closed, either automatically/silently by this code (or possibly by the server)
+
+
+ // Now hook everything up (i.e. set up the streams), Java style:
+ os = socket.getOutputStream();
+ ps = new PrintStream(os);
+ ps.println("This message was produced by the MahanClient."); // this gets sent back to client!
+
+ ps.flush();
+
+
+
+ } // end while(true)
+ } catch (IOException e) {
+ System.err.println("Problem with TcpExample3ServerClient networking:"); // describe what is happening
+ System.err.println("Error: " + e);
+
+ // Provide more helpful information to user if exception occurs due to running twice at one time
+ if (e instanceof java.net.BindException) {
+ System.err.println("*** Be sure to stop any other running instances of programs using this port!");
+ }
+ } finally {
+
+ // program exit: tell somebody about that
+ System.out.println("\nclient exit");
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Mahan_Server.java b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Mahan_Server.java
new file mode 100644
index 0000000000000000000000000000000000000000..7e8ef6460bda2cb538461e6dc6d4cf61b5d6482c
--- /dev/null
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Mahan_Server.java
@@ -0,0 +1,94 @@
+package MV3500Cohort2020JulySeptember.homework2.Mahan;
+
+import java.io.*;
+import java.net.*;
+
+/**
+ *
+ * @author Bill
+ */
+public class Mahan_Server {
+
+ public static void main(String[] args) {
+ try {
+
+ // ServerSocket waits for a connection from a client.
+ // Notice that it is outside the loop; ServerSocket
+ // needs to be made only once.
+ System.out.println("TcpExample3Server has started..."); // it helps debugging to put this on console first
+
+ ServerSocket serverSocket = new ServerSocket(2317);
+ OutputStream os;
+ PrintStream ps;
+ InetAddress localAddress, remoteAddress;
+
+ InputStream is;
+ InputStreamReader isr;
+ BufferedReader br;
+ String clientMessage;
+ int localPort, remotePort;
+
+ // Server is up and waiting (i.e. "blocked" or paused)
+ // Loop, infinitely, waiting for client connections.
+ // Stop the program somewhere else.
+ while (true) {
+
+ // block until connected to a client
+ try (Socket clientConnection = serverSocket.accept()) {
+
+ // Now hook everything up (i.e. set up the streams), Java style:
+ os = clientConnection.getOutputStream();
+ ps = new PrintStream(os);
+ ps.println("Go away!"); // this gets sent back to client!
+
+ // Print some information locally about the Socket connection.
+ // This includes the port and IP numbers on both sides (the socket pair).
+ localAddress = clientConnection.getLocalAddress();
+ remoteAddress = clientConnection.getInetAddress();
+ localPort = clientConnection.getLocalPort();
+ remotePort = clientConnection.getPort();
+
+ // 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, 54881 ))
+
+ // Why is the first IP/port the same, while the second set has different ports?
+ System.out.println("TcpExample3Server socket pair: (( " + localAddress.toString() + ", " + localPort + " ), ( "
+ + remoteAddress.toString() + ", " + remotePort + " ))");
+
+ // Notice the use of flush() and try w/ resources. Without
+ // the try w/ resources the Socket object may stay open for
+ // a while after the client has stopped needing this
+ // connection. try w/ resources explicitly ends the connection.
+
+ // Now hook everything up (i.e. set up the streams), Java style:
+ is = clientConnection.getInputStream();
+ isr = new InputStreamReader(is);
+ br = new BufferedReader(isr);
+
+
+ // Read a single line written by the server. We'd
+ // do things a bit differently if there were many lines to be read
+ // from the server instead of one only.
+ clientMessage = br.readLine();
+ System.out.println("==================================================");
+ System.out.println("Now we're talking!");
+ System.out.println("The message the server sent was: '" + clientMessage + "'");
+// System.out.println("This was the "+ count +" connection.");
+
+
+
+ ps.flush();
+ // like it or not, you're outta here!
+ }
+ }
+ } catch (IOException e) {
+ System.err.println("Problem with TcpExample3Server networking: " + e);
+
+ // Provide more helpful information to user if exception occurs due to running twice at one time
+ if (e instanceof java.net.BindException) {
+ System.err.println("*** Be sure to stop any other running instances of programs using this port!");
+ }
+ }
+ }
+}
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Output.PNG b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Output.PNG
new file mode 100644
index 0000000000000000000000000000000000000000..f4186dec73b83c4b7ee9acc2922bab7e7c281935
Binary files /dev/null and b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/Output.PNG differ
diff --git a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/README.md b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/README.md
index 0144d62d033fbe094ceac7a6d1bedc12d3c158b0..6b0b4f34a9cc7b4a993e6cc6dd545c1e6412f142 100644
--- a/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/README.md
+++ b/assignments/src/MV3500Cohort2020JulySeptember/homework2/Mahan/README.md
@@ -10,3 +10,11 @@ References include
* [assignments source subdirectories](../../../../../assignments/src) show examples from previous cohorts.
Questions and innovation are always welcome, good luck!
+
+Coded two classes:
+MahanServer
+MahanClient
+
+1. Run the MahanServer once
+2. Run the MahanClient as many times as you want
+3. Enjoy the messages from the two consoles
\ No newline at end of file