Use for-each statement

Change-Id: Ib89f3372caebc30542739c0eba62f67ef56a4d4e

@@ -606,17 +606,14 @@ public class SimpleGroupStore
                 + "southboundGroupEntries for device {}",
                   southboundGroupEntries.size(),
                   deviceId);
-        for (Iterator<Group> it = southboundGroupEntries.iterator(); it.hasNext();) {
-            Group group = it.next();
+        for (Group group : southboundGroupEntries) {
             log.trace("Group {} in device {}", group, deviceId);
         }
 
         log.trace("Displaying all ({}) stored group entries for device {}",
                   storedGroupEntries.size(),
                   deviceId);
-        for (Iterator<Group> it1 = storedGroupEntries.iterator();
-                it1.hasNext();) {
-            Group group = it1.next();
+        for (Group group : storedGroupEntries) {
             log.trace("Stored Group {} for device {}", group, deviceId);
         }
 

@@ -1261,17 +1261,14 @@ public class DistributedGroupStore
         log.trace("pushGroupMetrics: Displaying all ({}) southboundGroupEntries for device {}",
                   southboundGroupEntries.size(),
                   deviceId);
-        for (Iterator<Group> it = southboundGroupEntries.iterator(); it.hasNext();) {
-            Group group = it.next();
+        for (Group group : southboundGroupEntries) {
             log.trace("Group {} in device {}", group, deviceId);
         }
 
         log.trace("Displaying all ({}) stored group entries for device {}",
                   storedGroupEntries.size(),
                   deviceId);
-        for (Iterator<StoredGroupEntry> it1 = storedGroupEntries.iterator();
-             it1.hasNext();) {
-            Group group = it1.next();
+        for (StoredGroupEntry group : storedGroupEntries) {
             log.trace("Stored Group {} for device {}", group, deviceId);
         }
 

@@ -82,9 +82,8 @@ public class PersistentSet<E> implements Set<E> {
     public Object[] toArray() {
         Object[] retArray = new Object[items.size()];
         int index = 0;
-        Iterator<byte[]> iterator = items.iterator();
-        while (iterator.hasNext()) {
-            retArray[index] = serializer.decode(iterator.next());
+        for (byte[] item : items) {
+            retArray[index] = serializer.decode(item);
             index++;
         }
         return retArray;