src/share/classes/java/util/concurrent/ConcurrentHashMap.java

rev 7932 : 8021591: Additional explicit null checks
Reviewed-by: psandoz, martin, alanb

*** 47,56 ****
--- 47,57 ----
  import java.util.HashMap;
  import java.util.Hashtable;
  import java.util.Iterator;
  import java.util.Map;
  import java.util.NoSuchElementException;
+ import java.util.Objects;
  import java.util.Set;
  import java.util.Spliterator;
  import java.util.concurrent.ConcurrentMap;
  import java.util.concurrent.ForkJoinPool;
  import java.util.concurrent.atomic.AtomicReference;
*** 4408,4417 ****
--- 4409,4419 ----
              }
              return true;
          }
  
          public final boolean removeAll(Collection<?> c) {
+             Objects.requireNonNull(c);
              boolean modified = false;
              for (Iterator<E> it = iterator(); it.hasNext();) {
                  if (c.contains(it.next())) {
                      it.remove();
                      modified = true;
*** 4419,4428 ****
--- 4421,4431 ----
              }
              return modified;
          }
  
          public final boolean retainAll(Collection<?> c) {
+             Objects.requireNonNull(c);
              boolean modified = false;
              for (Iterator<E> it = iterator(); it.hasNext();) {
                  if (!c.contains(it.next())) {
                      it.remove();
                      modified = true;