From c5d2ae30631663570b95db981aafa784534a02dc Mon Sep 17 00:00:00 2001
From: Simon32220 <Simon.Schnitzler@gmx.de>
Date: Sun, 21 Jul 2024 23:24:46 -0700
Subject: [PATCH] Homework1
---
.../SchnitzlerUnicastNetworking.java | 70 +++++++++++++++++++
.../homework1/Schnitzler/package-info.java | 10 +++
2 files changed, 80 insertions(+)
create mode 100644 assignments/src/MV3500Cohort2024JulySeptember/homework1/Schnitzler/SchnitzlerUnicastNetworking.java
create mode 100644 assignments/src/MV3500Cohort2024JulySeptember/homework1/Schnitzler/package-info.java
diff --git a/assignments/src/MV3500Cohort2024JulySeptember/homework1/Schnitzler/SchnitzlerUnicastNetworking.java b/assignments/src/MV3500Cohort2024JulySeptember/homework1/Schnitzler/SchnitzlerUnicastNetworking.java
new file mode 100644
index 0000000000..987ab61e24
--- /dev/null
+++ b/assignments/src/MV3500Cohort2024JulySeptember/homework1/Schnitzler/SchnitzlerUnicastNetworking.java
@@ -0,0 +1,70 @@
+package MV3500Cohort2024JulySeptember.homework1.Schnitzler;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.net.ServerSocket;
+import java.net.Socket;
+
+/**
+ *
+ * @author simonschnitzler
+ */
+public class SchnitzlerUnicastNetworking {
+
+ /** Default constructor */
+ public SchnitzlerUnicastNetworking()
+ {
+ // default constructor
+ }
+
+ /**
+ * @param args the command line arguments
+ */
+ public static void main(String[] args) {
+ try
+ {
+ System.out.println(SchnitzlerUnicastNetworking.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);
+
+ ps.println("This client response was written by server " + SchnitzlerUnicastNetworking.class.getName()); // to remote client
+ System.out.println("This server response was written by server " + SchnitzlerUnicastNetworking.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(SchnitzlerUnicastNetworking.class.getName() + " completed successfully.");
+ }
+ catch(IOException ioe)
+ {
+ System.err.println("Exception with " + SchnitzlerUnicastNetworking.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/Schnitzler/package-info.java b/assignments/src/MV3500Cohort2024JulySeptember/homework1/Schnitzler/package-info.java
new file mode 100644
index 0000000000..e717c85b9d
--- /dev/null
+++ b/assignments/src/MV3500Cohort2024JulySeptember/homework1/Schnitzler/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.Schnitzler;
--
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