src/share/classes/java/util/Hashtable.java

rev 7682 : 8021591: Additional explicit null checks
Reviewed-by: duke

*** 1016,1025 ****
--- 1016,1027 ----
          return false;
      }
  
      @Override
      public synchronized boolean replace(K key, V oldValue, V newValue) {
+         Objects.requireNonNull(oldValue);
+         Objects.requireNonNull(newValue);
          Entry<?,?> tab[] = table;
          int hash = hash(key);
          int index = (hash & 0x7FFFFFFF) % tab.length;
          @SuppressWarnings("unchecked")
          Entry<K,V> e = (Entry<K,V>)tab[index];
*** 1036,1045 ****
--- 1038,1048 ----
          return false;
      }
  
      @Override
      public synchronized V replace(K key, V value) {
+         Objects.requireNonNull(value);
          Entry<?,?> tab[] = table;
          int hash = hash(key);
          int index = (hash & 0x7FFFFFFF) % tab.length;
          @SuppressWarnings("unchecked")
          Entry<K,V> e = (Entry<K,V>)tab[index];