replace hardwired value with defined constant

examples/src/UdpMulticastExamples/UdpSender.java

@@ -68,8 +68,8 @@ public class UdpSender
             
             for (int index = 1; index <= TOTAL_PACKETS_TO_SEND; index++) // avoid infinite send loops in code, they can be hard to kill!
             {
-                packetID++;             // increment counter, prefer using explicit value to index
-                value = 100 - packetID; // countdown
+                packetID++;                               // increment counter, prefer using explicit value to index
+                value = TOTAL_PACKETS_TO_SEND - packetID; // countdown
                 boolean isPacketIdEvenParity = ((packetID % 2) == 0); // % is modulo operator; result 0 is even parity, 1 is odd parity
                 
                 // values of interest follow. order and types of what was sent must match what you are reading!