Delete HW2

assignments/src/MV3500Cohort2023MarchJune/homework2/Islas/HW2

-package MV3500Cohort2023MarchJune.homework2.Islas;
-
-import java.io.*;
-import java.net.*;
-
-/**
- * An example of receiving UDP packets. Since very often both the
- * sender and receiver are on the same host we use different ports
- * for each. This prevents collision complaints from the localhost.
- * 
- * Start this before launching UdpSender.
- *
- * @see <a href="https://docs.oracle.com/javase/tutorial/networking/datagrams/index.html">https://docs.oracle.com/javase/tutorial/networking/datagrams/index.html</a>
- * @see <a href="https://docs.oracle.com/javase/tutorial/essential/io/datastreams.html">https://docs.oracle.com/javase/tutorial/essential/io/datastreams.html</a>
- * @see <a href="https://en.wikipedia.org/wiki/User_Datagram_Protocol">https://en.wikipedia.org/wiki/User_Datagram_Protocol</a>
- * @author mcgredo
- * @author brutzman@nps.edu
- */
-public class UnicastUdpReceiver
-{
-    /** Default constructor */
-    public UnicastUdpReceiver()
-    {
-        // default constructor
-    }
-//  public static final int        SENDING_PORT = 1414;        // port used by UdpSender, unneeded here
-    /** socket value of shared interest */
-    public static final int      UDP_PORT = 1415;        // sharable
-    /** socket value of shared interest */
-    public static final String DESTINATION_HOST = "localhost";
-
-    /**
-     * Program invocation, execution starts here
-     * @param args command-line arguments
-     */
-    public static void main(String[] args)
-    {
-        DatagramSocket udpSocket = null;
-        
-        try
-        {
-            // System.out.println(UnicastUdpReceiver.class.getName() + " started...");
-            System.out.println("What is the airspeed velocity of an unladen Swallow?");
-            
-            // Create a UDP socket
-            udpSocket = new DatagramSocket(UDP_PORT);
-            udpSocket.setReceiveBufferSize(1500); // how many bytes are in buffer?  MTU=1500 is good
-            udpSocket.setBroadcast(false);        // we're just receiving here
-//            udpSocket.setReuseAddress(true);
-            
-            byte[] byteArray = new byte[1500];
-            DatagramPacket receivePacket = new DatagramPacket(byteArray, byteArray.length);
-            
-            ByteArrayInputStream bais = new ByteArrayInputStream(byteArray);
-            DataInputStream dis = new DataInputStream(bais);
-            
-            // boolean       isEvenParity;
-            int           packetCount = 0;
-            int           firstInt;   
-            // float         secondFloat;
-            // String        thirdString;
-            // String        padding;
-            
-            // You need a new receiving packet to read from every packet received
-            while (true)
-            {
-                packetCount++; // good practice to increment counter at start of loop, when possible
-                udpSocket.receive(receivePacket); // blocks until packet is received
-                
-                if (packetCount == 1)
-                {                
-                    if  (udpSocket.getInetAddress() == null)
-                         System.out.println("UdpReceiver address/port: UDP socket address null (loopback)" + "/" + UDP_PORT);
-                    else System.out.println("UdpReceiver address/port: " + udpSocket.getInetAddress().getHostAddress() + "/" + UDP_PORT);
-                }
-
-                // values of interest follow. order and types of what was sent must match what you are reading!
-                firstInt     = dis.readInt();     // packetID
-                // secondFloat  = dis.readFloat();
-                // thirdString  = dis.readUTF();     // string value with guaranteed encoding, matches UTF-8 is 8 bit
-                // isEvenParity = dis.readBoolean(); // ok, we've gotten everything we're looking for.  
-                
-                dis.reset(); // now clear the input stream after reading, in preparation for next loop
-                
-                // if  (isEvenParity) 
-                //      padding = " ";
-                // else padding = "";
-                
-                if (firstInt == 11) {
-                    System.out.println("You may pass");
-                } 
-                else {
-                    System.out.println("Pull the lever!");
-                }
-
-                // System.out.println("[" + UnicastUdpReceiver.class.getName() + "]" + 
-                //                                     " port="   + UDP_PORT +
-                //                                 " packetID="   + firstInt +            // have output message use same name as sender
-                //                      ", second float value="   + secondFloat  + 
-                //                      ", third String value=\"" + thirdString  + "\"" + // note that /" is literal quote character
-                //                     " isPacketIdEvenParity="   + isEvenParity + ","  + padding +
-                //                      " packet counter="        + packetCount);
-            }
-        }
-        catch(IOException e)
-        {
-            System.err.println("Problem with UdpReceiver, see exception trace:");
-            System.err.println(e);
-        } 
-        finally // clean up prior to exit, don't want to leave behind zombie socket
-        {
-            if (udpSocket != null)
-                udpSocket.close();
-            System.out.println(UnicastUdpReceiver.class.getName() + " complete."); // all done
-        }
-    }
-}