src/java.base/share/classes/java/util/Properties.java

*** 1343,1353 ****
      @Override
      public synchronized boolean remove(Object key, Object value) {
          return map.remove(key, value);
      }
  
!     /** @hidden */
      @Override
      public synchronized boolean replace(Object key, Object oldValue, Object newValue) {
          return map.replace(key, oldValue, newValue);
      }
  
--- 1343,1356 ----
      @Override
      public synchronized boolean remove(Object key, Object value) {
          return map.remove(key, value);
      }
  
!     /**
!      * @hidden
!      * @since 9
!      */
      @Override
      public synchronized boolean replace(Object key, Object oldValue, Object newValue) {
          return map.replace(key, oldValue, newValue);
      }