src/java.base/share/classes/java/util/concurrent/ThreadPoolExecutor.java

8190324: ThreadPoolExecutor should not specify a dependency on finalization
Reviewed-by: martin, psandoz, alanb, rriggs, dholmes

*** 33,45 ****
   * http://creativecommons.org/publicdomain/zero/1.0/
   */
  
  package java.util.concurrent;
  
- import java.security.AccessControlContext;
- import java.security.AccessController;
- import java.security.PrivilegedAction;
  import java.util.ArrayList;
  import java.util.ConcurrentModificationException;
  import java.util.HashSet;
  import java.util.Iterator;
  import java.util.List;
--- 33,42 ----
*** 266,277 ****
   *
   * <dt>Reclamation</dt>
   *
   * <dd>A pool that is no longer referenced in a program <em>AND</em>
   * has no remaining threads may be reclaimed (garbage collected)
!  * without being explicity shutdown. You can configure a pool to allow
!  * all unused threads to eventually die by setting appropriate
   * keep-alive times, using a lower bound of zero core threads and/or
   * setting {@link #allowCoreThreadTimeOut(boolean)}.  </dd>
   *
   * </dl>
   *
--- 263,274 ----
   *
   * <dt>Reclamation</dt>
   *
   * <dd>A pool that is no longer referenced in a program <em>AND</em>
   * has no remaining threads may be reclaimed (garbage collected)
!  * without being explicitly shutdown. You can configure a pool to
!  * allow all unused threads to eventually die by setting appropriate
   * keep-alive times, using a lower bound of zero core threads and/or
   * setting {@link #allowCoreThreadTimeOut(boolean)}.  </dd>
   *
   * </dl>
   *
*** 1460,1469 ****
--- 1457,1478 ----
          } finally {
              mainLock.unlock();
          }
      }
  
+     // Override without "throws Throwable" for compatibility with subclasses
+     // whose finalize method invokes super.finalize() (as is recommended).
+     // Before JDK 11, finalize() had a non-empty method body.
+ 
+     /**
+      * @implNote Previous versions of this class had a finalize method
+      * that shut down this executor, but in this version, finalize
+      * does nothing.
+      */
+     @Deprecated(since="9")
+     protected void finalize() {}
+ 
      /**
       * Sets the thread factory used to create new threads.
       *
       * @param threadFactory the new thread factory
       * @throws NullPointerException if threadFactory is null