git: openjdk/jdk: 8283415: Update java.lang.ref to use sealed classes

[Joe Darcy]

Changeset: 14b9e80b
Author:    Joe Darcy <darcy at openjdk.org>
Date:      2022-03-21 16:57:17 +0000
URL:       https://git.openjdk.java.net/jdk/commit/14b9e80b8adcc0ab0634357f5a7c25f24fd6808c

8283415: Update java.lang.ref to use sealed classes

Reviewed-by: kbarrett, alanb

! src/java.base/share/classes/java/lang/ref/FinalReference.java
! src/java.base/share/classes/java/lang/ref/PhantomReference.java
! src/java.base/share/classes/java/lang/ref/Reference.java
! src/java.base/share/classes/java/lang/ref/SoftReference.java
! src/java.base/share/classes/java/lang/ref/WeakReference.java