--- a/jdk/src/java.base/share/classes/java/util/concurrent/DelayQueue.java	Tue Oct 13 16:35:22 2015 -0700
+++ b/jdk/src/java.base/share/classes/java/util/concurrent/DelayQueue.java	Tue Oct 13 16:45:35 2015 -0700
@@ -34,10 +34,16 @@
  */
 
 package java.util.concurrent;
+
 import static java.util.concurrent.TimeUnit.NANOSECONDS;
+
+import java.util.AbstractQueue;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+import java.util.PriorityQueue;
 import java.util.concurrent.locks.Condition;
 import java.util.concurrent.locks.ReentrantLock;
-import java.util.*;
 
 /**
  * An unbounded {@linkplain BlockingQueue blocking queue} of
@@ -65,7 +71,7 @@
  *
  * @since 1.5
  * @author Doug Lea
- * @param <E> the type of elements held in this collection
+ * @param <E> the type of elements held in this queue
  */
 public class DelayQueue<E extends Delayed> extends AbstractQueue<E>
     implements BlockingQueue<E> {
@@ -89,7 +95,7 @@
      * signalled.  So waiting threads must be prepared to acquire
      * and lose leadership while waiting.
      */
-    private Thread leader = null;
+    private Thread leader;
 
     /**
      * Condition signalled when a newer element becomes available
@@ -185,10 +191,9 @@
         lock.lock();
         try {
             E first = q.peek();
-            if (first == null || first.getDelay(NANOSECONDS) > 0)
-                return null;
-            else
-                return q.poll();
+            return (first == null || first.getDelay(NANOSECONDS) > 0)
+                ? null
+                : q.poll();
         } finally {
             lock.unlock();
         }
@@ -211,7 +216,7 @@
                     available.await();
                 else {
                     long delay = first.getDelay(NANOSECONDS);
-                    if (delay <= 0)
+                    if (delay <= 0L)
                         return q.poll();
                     first = null; // don't retain ref while waiting
                     if (leader != null)
@@ -253,15 +258,15 @@
             for (;;) {
                 E first = q.peek();
                 if (first == null) {
-                    if (nanos <= 0)
+                    if (nanos <= 0L)
                         return null;
                     else
                         nanos = available.awaitNanos(nanos);
                 } else {
                     long delay = first.getDelay(NANOSECONDS);
-                    if (delay <= 0)
+                    if (delay <= 0L)
                         return q.poll();
-                    if (nanos <= 0)
+                    if (nanos <= 0L)
                         return null;
                     first = null; // don't retain ref while waiting
                     if (nanos < delay || leader != null)
@@ -490,7 +495,7 @@
     }
 
     /**
-     * Identity-based version for use in Itr.remove
+     * Identity-based version for use in Itr.remove.
      */
     void removeEQ(Object o) {
         final ReentrantLock lock = this.lock;