src/java.base/share/classes/java/lang/Boolean.java

*** 23,21 ***
   * questions.
   */
  
  package java.lang;
  
  import jdk.internal.vm.annotation.IntrinsicCandidate;
  
  import java.lang.constant.Constable;
- import java.lang.constant.ConstantDesc;
  import java.lang.constant.ConstantDescs;
  import java.lang.constant.DynamicConstantDesc;
  import java.util.Optional;
  
- import static java.lang.constant.ConstantDescs.BSM_GET_STATIC_FINAL;
- import static java.lang.constant.ConstantDescs.CD_Boolean;
- 
  /**
   * The {@code Boolean} class is the {@linkplain
   * java.lang##wrapperClass wrapper class} for values of the primitive
   * type {@code boolean}. An object of type {@code Boolean} contains a
   * single field whose type is {@code boolean}.
--- 23,18 ---
   * questions.
   */
  
  package java.lang;
  
+ import jdk.internal.value.DeserializeConstructor;
  import jdk.internal.vm.annotation.IntrinsicCandidate;
  
  import java.lang.constant.Constable;
  import java.lang.constant.ConstantDescs;
  import java.lang.constant.DynamicConstantDesc;
  import java.util.Optional;
  
  /**
   * The {@code Boolean} class is the {@linkplain
   * java.lang##wrapperClass wrapper class} for values of the primitive
   * type {@code boolean}. An object of type {@code Boolean} contains a
   * single field whose type is {@code boolean}.

*** 47,18 ***
   * {@code String} to a {@code boolean}, as well as other
   * constants and methods useful when dealing with a
   * {@code boolean}.
   *
   * <p>This is a <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a>
!  * class; programmers should treat instances that are
!  * {@linkplain #equals(Object) equal} as interchangeable and should not
!  * use instances for synchronization, or unpredictable behavior may
!  * occur. For example, in a future release, synchronization may fail.
   *
   * @author  Arthur van Hoff
   * @since   1.0
   */
  @jdk.internal.ValueBased
  public final class Boolean implements java.io.Serializable,
                                        Comparable<Boolean>, Constable
  {
      /**
--- 44,27 ---
   * {@code String} to a {@code boolean}, as well as other
   * constants and methods useful when dealing with a
   * {@code boolean}.
   *
   * <p>This is a <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a>
!  * class; programmers should treat instances that are {@linkplain #equals(Object) equal}
!  * as interchangeable and should not use instances for synchronization, mutexes, or
!  * with {@linkplain java.lang.ref.Reference object references}.
!  *
+  * <div class="preview-block">
+  *      <div class="preview-comment">
+  *          When preview features are enabled, {@code Boolean} is a {@linkplain Class#isValue value class}.
+  *          Use of value class instances for synchronization, mutexes, or with
+  *          {@linkplain java.lang.ref.Reference object references} result in
+  *          {@link IdentityException}.
+  *      </div>
+  * </div>
   *
   * @author  Arthur van Hoff
   * @since   1.0
   */
+ @jdk.internal.MigratedValueClass
  @jdk.internal.ValueBased
  public final class Boolean implements java.io.Serializable,
                                        Comparable<Boolean>, Constable
  {
      /**

*** 172,10 ***
--- 178,11 ---
       * @param  b a boolean value.
       * @return a {@code Boolean} instance representing {@code b}.
       * @since  1.4
       */
      @IntrinsicCandidate
+     @DeserializeConstructor
      public static Boolean valueOf(boolean b) {
          return (b ? TRUE : FALSE);
      }
  
      /**