fix: basic client server on same port

app/src/main/java/clientserver/Client.java

@@ -0,0 +1,31 @@
+package clientserver;
+
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+
+public class Client {
+    public static void main(String[] args) {
+        try {
+            // 1 - Création du canal avec un port libre
+            DatagramSocket socketClient = new DatagramSocket();
+            InetAddress adresseClient = InetAddress.getByName("localhost");
+            byte[] envoyees; // tampon d'émission
+            byte[] recues = new byte[1024]; // tampon de réception
+            // 2 - Émettre
+            String message = "hello serveur RX302";
+            envoyees = message.getBytes();
+            DatagramPacket messageEnvoye = new DatagramPacket(envoyees, envoyees.length, adresseClient, 6666);
+            socketClient.send(messageEnvoye);
+            // 3 - Recevoir
+            DatagramPacket paquetRecu = new DatagramPacket(recues, recues.length);
+            socketClient.receive(paquetRecu);
+            String reponse = new String(paquetRecu.getData(), 0, paquetRecu.getLength());
+            System.out.println(reponse + " @" + paquetRecu.getAddress() + ":" + paquetRecu.getPort());
+            // 4 - Libérer le canal
+            socketClient.close();
+        } catch (Exception e) {
+            System.err.println(e);
+        }
+    }
+}