diff --git a/assignments/src/MV3500Cohort2024JulySeptember/homework1/Yu/README.md b/assignments/src/MV3500Cohort2024JulySeptember/homework1/Yu/README.md
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+My Assignment #1
diff --git a/assignments/src/MV3500Cohort2024JulySeptember/homework1/Yu/TcpExample1TelnetYu.java b/assignments/src/MV3500Cohort2024JulySeptember/homework1/Yu/TcpExample1TelnetYu.java
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+package MV3500Cohort2024JulySeptember.homework1.Yu;
+
+import src.TcpExamples.*;
+import java.io.*;
+import java.net.*;
+
+/**
+ * <p>
+ * The simplest possible TCP network program, opening a socket and waiting for a reply.
+ * It listens for any socket connection response, either from telnet (telnet localhost 2317)
+ * or another program that you write (which we will do later).
+ * Once a socket connection is established, TcpExample1Telnet simply
+ * writes a string in response to that connection and finishes, exiting.
+ *
+ * <p>
+ * As an alternative to running the Windows (or other operating system) console,
+ * you can instead run the NetBeans terminal window. If you are on Windows,
+ * NetBeans is looking for Cgwin installation (for Unix-like compatibility)
+ * with details at <a href="https://savage.nps.edu/Savage/developers.html#Cygwin" target="blank">Savage Developers Guide: Cygwin</a>.
+ * Modifying this program is the basis for Assignment 1.
+ * </p>
+ *
+ * <p>
+ * Testing the running server program from telnet looks like this:
+ * </p>
+ * <pre>
+ * it154916:projects mcgredo$ <b>telnet localhost 2317</b>
+ * Trying ::1...
+ * Connected to localhost.
+ * Escape character is '^]'.
+ * This was written by the server
+ * Connection closed by foreign host.
+ * </pre>
+ * <p>
+ * Notice that "This was written by the server" matches
+ * what is written by the code below, over the output stream.
+ * </p>
+ *
+ * <p>
+ * After this first connection the program below drops to
+ * the bottom of the method, and does not repeat itself.
+ * In other words, the program exits.
+ * </p>
+ *
+ * @see <a href="../../../src/TcpExamples/TcpExample1TerminalLog.txt" target="_blank">TcpExample1TerminalLog.txt</a>
+ * @see <a href="../../../src/TcpExamples/TcpExample1NetBeansConsoleTelnet.png" target="_blank">TcpExample1NetBeansConsoleTelnet.png</a>
+ * @see <a href="../../../src/TcpExamples/TcpExample1NetBeansConsoleTelnet.pdf" target="_blank">TcpExample1NetBeansConsoleTelnet.pdf</a>
+ * @see <a href="../../../src/TcpExamples/TcpExample1ScreenshotNetcat.png" target="_blank">TcpExample1ScreenshotNetcat.png</a>
+ * @see <a href="../../../src/TcpExamples/TcpExample1ScreenshotTelnet.png" target="_blank">TcpExample1ScreenshotTelnet.png</a>
+ * @see <a href="https://savage.nps.edu/Savage/developers.html#Cygwin" target="blank">Savage Developers Guide: Cygwin</a>
+ * @see <a href="https://savage.nps.edu/Savage/developers.html#telnet" target="blank">Savage Developers Guide: telnet</a>
+ *
+ * @author mcgredo
+ * @author brutzman@nps.edu
+ */
+public class TcpExample1TelnetYu
+{
+ /** Default constructor */
+ public TcpExample1TelnetYu()
+ {
+ // default constructor
+ }
+ /**
+ * Program invocation, execution starts here
+ * @param args command-line arguments
+ */
+ public static void main(String[] args)
+ {
+ try
+ {
+ System.out.println(TcpExample1TelnetYu.class.getName() + " has started and is waiting for a connection.");
+ System.out.println(" help: https://savage.nps.edu/Savage/developers.html#telnet");
+ System.out.println(" terminal: enter (telnet localhost 2317) or, for macOS (nc localhost 2317)..." );
+
+ // The ServerSocket waits for a connection from a client.
+ // It returns a Socket object when the connection occurs.
+ ServerSocket serverSocket = new ServerSocket(2317);
+
+ // Use Java io classes to write text (as opposed to
+ // unknown bytes of some sort) to the client
+
+ // The Socket object represents the connection between
+ // the server and client, including a full duplex connection
+ try (Socket clientConnection = serverSocket.accept()) // listen, wait here for a client to connect
+ {
+ // OK we got something, time to respond!
+ // Use Java io classes to write text (as opposed to
+ // unknown bytes of some sort) to the client
+ OutputStream os = clientConnection.getOutputStream();
+ PrintStream ps = new PrintStream(os);
+
+ String remoteHostname = clientConnection.getInetAddress().getHostAddress();
+ ps.println("The " + remoteHostname + " client response was written by server " + TcpExample1TelnetYu.class.getName()); // to remote client
+ System.out.println("The " + remoteHostname + " server response was written by server " + TcpExample1TelnetYu.class.getName()); // to server console
+
+ // "flush()" in important in that it forces a write
+ // across what is in fact a slow connection
+ ps.flush();
+ }
+ System.out.println(TcpExample1TelnetYu.class.getName() + " completed successfully.");
+ }
+ catch(IOException ioe)
+ {
+ System.err.println("Exception with " + TcpExample1TelnetYu.class.getName() + " networking:"); // describe what is happening
+ System.err.println(ioe);
+ // Provide more helpful information to user if exception occurs due to running twice at one time
+
+ // brute force exception checking, can be brittle if exception message changes
+ // if (e.getMessage().equals("Address already in use: NET_Bind"))
+ if (ioe 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/MV3500Cohort2024JulySeptember/homework1/Yu/package-info.java b/assignments/src/MV3500Cohort2024JulySeptember/homework1/Yu/package-info.java
new file mode 100644
index 0000000000000000000000000000000000000000..36c25b042fa4b01623744512c7edbbd60c30fd94
--- /dev/null
+++ b/assignments/src/MV3500Cohort2024JulySeptember/homework1/Yu/package-info.java
@@ -0,0 +1,10 @@
+/**
+ * TCP Unicast homework assignments supporting the NPS MOVES MV3500 Networked Graphics course.
+ *
+ * @see <a href="https://gitlab.nps.edu/Savage/NetworkedGraphicsMV3500/-/tree/master/assignments" target="_blank">networkedGraphicsMV3500 assignments</a>
+ * @see java.lang.Package
+ * @see <a href="https://stackoverflow.com/questions/22095487/why-is-package-info-java-useful" target="_blank">StackOverflow: why-is-package-info-java-useful</a>
+ * @see <a href="https://stackoverflow.com/questions/624422/how-do-i-document-packages-in-java" target="_blank">StackOverflow: how-do-i-document-packages-in-java</a>
+ */
+
+package MV3500Cohort2024JulySeptember.homework1.Yu;