Upload Homework 1 - Goericke

assignments/src/MV3500Cohort2020JulySeptember/homework1/GoerickeTcpExample1Telnet.java

+
+package MV3500Cohort2020JulySeptember.homework1;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintStream;
+import java.net.ServerSocket;
+import java.net.Socket;
+
+/**
+ * Homework 1 for class MV3500 - Summer 2020
+ * @author Goericke, Stefan
+ */
+public class GoerickeTcpExample1Telnet {
+
+    /**
+     * @param args the command line arguments
+     */
+    public static void main(String[] args) throws IOException {
+        System.out.println("Homework 1 MV3500 - Summer 2020 (Author: Stefan Goericke)");
+        System.out.println("---------------------------------------------------------");
+        String masterString = "           #########   ######    #       #\r\n";
+        masterString = masterString + "               #       #          #     #\r\n";
+        masterString = masterString + "               #       ######      #   #\r\n";
+        masterString = masterString + "               #            #       # #\r\n";
+        masterString = masterString + "               #       ######        #\r\n";
+        
+        //build up connection
+        try
+        {
+            // build serverSOcket with port 2317
+            ServerSocket serverSocket = new ServerSocket(2317);
+            System.out.println("ServerSocket created with port 2317 ..."); 
+            
+            // open client connection. Wait for answer (method accept)
+            System.out.println("Open telnet client in cmd-console: telnet localhost 2317");
+            Socket clientConnection = serverSocket.accept();
+            System.out.println("Client Connection established ...");
+            
+            // create stream-objects
+            OutputStream os = clientConnection.getOutputStream();
+            PrintStream ps = new PrintStream(os); // already declared outside try-block
+            System.out.println("Stream objects created ...");      
+        
+            try{// connection was established
+                System.out.println("Connection established, sending message --> /n");
+                
+                ps.println("This client response was written by server TcpExample1.");          
+                ps.println(masterString);
+                
+                System.out.println("This server response was written by server TcpExample1.");
+                System.out.println(masterString);
+
+                ps.flush();
+            }
+            catch(Exception e){ // in case message could not be send
+                System.out.println("Error while sending message .... press ENTER");
+                System.in.read();
+                System.exit(0);
+                
+            }
+            clientConnection.close();
+        }
+        catch (IOException e){ // connection could not be established
+            System.out.println("Connection could not be established. Quit programm");
+            System.in.read();
+            System.exit(0);   
+        }
+       
+    }
+    
+}