new jars and debug output in multicast demo

VerteilteSysteme-Examples/src/verteiltesysteme/socket/multicast/UDPMulticastConsumer.java

@@ -17,7 +17,7 @@ class UDPMulticastConsumer {
 			DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
 			mcastSocket.receive(receivePacket);
 			String sentence = new String(receivePacket.getData(), 0, receivePacket.getLength());
-			System.out.println(sentence);
+			System.out.println("Empfangene Multicast-Nachricht (an: " + groupname + ":" + udpPort + "): " + sentence);
 		}
 	}
 }

VerteilteSysteme-Examples/src/verteiltesysteme/socket/multicast/UDPMulticastProducer.java

@@ -14,6 +14,7 @@ class UDPMulticastProducer {
 		
 		byte[] sendData = new byte[1024];
 
+		System.out.println("Geben Sie eine Nachricht ein: ");
 		String sentence = inFromUser.readLine();
 		sendData = sentence.getBytes();