src/java.base/share/classes/java/lang/ref/Cleaner.java

*** 25,34 ****
--- 25,35 ----
  
  package java.lang.ref;
  
  import java.util.Objects;
  import java.util.concurrent.ThreadFactory;
+ import java.util.function.Function;
  
  import jdk.internal.ref.CleanerImpl;
  
  /**
   * {@code Cleaner} manages a set of object references and corresponding cleaning actions.
*** 133,143 ****
       * The Cleaner implementation.
       */
      final CleanerImpl impl;
  
      static {
!         CleanerImpl.setCleanerImplAccess((Cleaner c) -> c.impl);
      }
  
      /**
       * Construct a Cleaner implementation and start it.
       */
--- 134,149 ----
       * The Cleaner implementation.
       */
      final CleanerImpl impl;
  
      static {
!         CleanerImpl.setCleanerImplAccess(new Function<Cleaner, CleanerImpl>() {
!             @Override
!             public CleanerImpl apply(Cleaner cleaner) {
!                 return cleaner.impl;
!             }
!         });
      }
  
      /**
       * Construct a Cleaner implementation and start it.
       */