Better internal name

Author: garydgregory

src/main/java/org/apache/commons/io/FileCleaningTracker.java

@@ -69,7 +69,7 @@ public void run() {
             while (!exitWhenFinished || !trackers.isEmpty()) {
                 try {
                     // Wait for a tracker to remove.
-                    final Tracker tracker = (Tracker) q.remove(); // cannot return null
+                    final Tracker tracker = (Tracker) refQueue.remove(); // cannot return null
                     trackers.remove(tracker);
                     if (!tracker.delete()) {
                         deleteFailures.add(tracker.getPath());
@@ -136,7 +136,7 @@ public String getPath() {
     /**
      * Queue of {@link Tracker} instances being watched.
      */
-    ReferenceQueue<Object> q = new ReferenceQueue<>();
+    ReferenceQueue<Object> refQueue = new ReferenceQueue<>();
 
     /**
      * Collection of {@link Tracker} instances in existence.
@@ -182,7 +182,7 @@ private synchronized void addTracker(final String path, final Object marker, fin
             reaper = new Reaper();
             reaper.start();
         }
-        trackers.add(new Tracker(path, deleteStrategy, marker, q));
+        trackers.add(new Tracker(path, deleteStrategy, marker, refQueue));
     }
 
     /**

src/test/java/org/apache/commons/io/FileCleaningTrackerTest.java

@@ -100,7 +100,7 @@ public void tearDown() {
          */
         {
             if (fileCleaningTracker != null) {
-                fileCleaningTracker.q = new ReferenceQueue<>();
+                fileCleaningTracker.refQueue = new ReferenceQueue<>();
                 fileCleaningTracker.trackers.clear();
                 fileCleaningTracker.deleteFailures.clear();
                 fileCleaningTracker.exitWhenFinished = false;