improve clarity with comments, rename

CourseExamples/src/DisExamples/PduSender.java

@@ -46,12 +46,13 @@ public class PduSender
 	{
 		System.out.println("DisExamples.PduSender started...");
         try {
-            List<Pdu> generatedPdus = new ArrayList<>();
+            List<Pdu> generatedPdusList = new ArrayList<>();
 
             // Loop through all the enumerated PDU types, create a PDU for each type,
-            // and add that PDU to a list.
-            for (PduType pdu : PduType.values()) {
-                Pdu aPdu = null;
+            // add that PDU to generatedPdusList, and send each one
+            for (PduType pdu : PduType.values()) 
+			{
+                Pdu aPdu = null; // edu.​nps.​moves.​dis,PDU superclass for all PDUs, 
 
                 switch (pdu) // using enumeration values from edu.nps.moves.disenum.*
 				{
@@ -140,25 +141,25 @@ public class PduSender
                 }
                 if (aPdu != null)
 				{
-                    generatedPdus.add(aPdu);
+                    generatedPdusList.add(aPdu);
                 }
             }
 
             // Sort the created PDUs by class name
-            Collections.sort(generatedPdus, new ClassNameComparator());
+            Collections.sort(generatedPdusList, new ClassNameComparator());
 
             // Send the PDUs we created
             InetAddress localMulticastAddress = InetAddress.getByName(DEFAULT_MULTICAST_ADDRESS);
             MulticastSocket socket = new MulticastSocket(DEFAULT_MULTICAST_PORT);
             socket.joinGroup(localMulticastAddress);
 
-            for (int idx = 0; idx < generatedPdus.size(); idx++)
+            for (int idx = 0; idx < generatedPdusList.size(); idx++)
 			{
                 ByteArrayOutputStream baos = new ByteArrayOutputStream();
                 DataOutputStream dos = new DataOutputStream(baos);
                 byte[] buffer;
 
-                Pdu aPdu = generatedPdus.get(idx);
+                Pdu aPdu = generatedPdusList.get(idx);
                 aPdu.marshal(dos);
 
                 buffer = baos.toByteArray();