creating folder

assignments/src/MV3500Cohort2019JulySeptember/homework2/McCannClient.java

-/*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
- */
-package MV3500Cohort2019JulySeptember.homework2;
-
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.net.Socket;
-import java.io.*;
-import java.net.*;
-import static javax.swing.Spring.constant;
-
-/**
- *
- * @author ljmm1
- */
-public class McCannClient {
-
-   // 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;
-        
-        try {
-            while (true) {
-                
-
-                // 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("Now we're talking!");
-               
-                System.out.println(serverMessage);
-                System.out.println("My name is Sir Launcelot of Camelot");
-                System.out.println("What is your quest?");
-                // socket gets closed, either automatically/silently by this code (or possibly by the server)
-                
-            } // 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");
-        }
-    }
-}

assignments/src/MV3500Cohort2019JulySeptember/homework2/McCannServer.java

-/*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
- */
-package MV3500Cohort2019JulySeptember.homework2;
-
-import java.io.*;
-import java.net.*;
-import java.util.Scanner;
-
-/**
- *
- * @author ljmm1
- */
-public class McCannServer {
-
- 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("McCannServer has started..."); // it helps debugging to put this on console first
-            //System.out.println("What is your name?");
-            ServerSocket serverSocket = new ServerSocket(2317);
-            OutputStream os;
-            PrintStream ps;
-            InetAddress localAddress, remoteAddress;
-            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);
-                    Scanner keyboard = new Scanner(System.in);
-                    ps.println("What is your name?"); // this gets sent back to client!
-                    //tried to add an input but couldn't get it to work
-                    //String message = keyboard.nextLine();
-                   // ps.println(message);
-                    
-                    // 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.
-                    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!");
-            }
-        }
-    }
-    
-}