Added new programme

Author: NisarLDev

UDP_Server_And_Client_Application/Programed_In_the_teacher's_way/Client_Side.java

@@ -0,0 +1,60 @@
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.Scanner;
+
+public class ClientDatagram {
+
+    private static InetAddress host;
+    private static final int PORT = 2082;
+    private static DatagramSocket datagramSocket;
+    private static DatagramPacket inPacket, outPacket;
+    private static byte[] buffer;
+
+    public static void main(String[] args) {
+        try {
+            host = InetAddress.getLocalHost();
+        } catch (UnknownHostException unknownHostException) {
+            System.out.println("ERROR : " + unknownHostException.getMessage());
+            System.exit(1);
+        }
+        accessServer();
+    }
+
+    private static void accessServer() {
+        try {
+            datagramSocket = new DatagramSocket();              //STEP 1
+            Scanner userEntry = new Scanner(System.in);
+            String message = "", response = "";
+            do {
+                System.out.println("Enter Message : ");
+                message = userEntry.nextLine();
+                if (!message.equals("***CLOSE***")) {
+                    outPacket = new DatagramPacket(message.getBytes(), message.l
+ength(), host, PORT); //STEP 2
+                    datagramSocket.send(outPacket); //STEP 3
+                    buffer = new byte[256]; //STEP 5
+                    inPacket = new DatagramPacket(buffer, buffer.length); //STEP
+ 5
+                    datagramSocket.receive(inPacket); //STEP 6
+                    response = new String(inPacket.getData(), 0, inPacket.getLen
+gth()); //STEP 7
+                    System.out.println("\n SERVER RESPONSE > " + response );
+
+                }
+
+            } while (!message.equals("***CLOSE***"));
+        } catch (IOException ioException) {
+            ioException.printStackTrace();
+            System.out.println("ERROR" + ioException.getMessage());
+
+        }finally {
+            System.out.println("\n * Closing connection ... *");
+            datagramSocket.close();  // STEP 8
+
+        }
+    }
+
+}