* RuntimeException}.
 *
 * <p>Here's an example that tests a {@code finalize} method:
 *
 * {@snippet :
 * final CountDownLatch latch = new CountDownLatch(1);
 * Object x = new MyClass() {
 *   ...
 *   protected void finalize() { latch.countDown(); ... }
 * };
 * x = null; // Hint to the JIT that x is stack-unreachable
 * GcFinalization.await(latch);
 * }
 *

 * RuntimeException}.
 *
 * <p>Here's an example that tests a {@code finalize} method:
 *
 * {@snippet :
 * final CountDownLatch latch = new CountDownLatch(1);
 * Object x = new MyClass() {
 *   ...
 *   protected void finalize() { latch.countDown(); ... }
 * };
 * x = null; // Hint to the JIT that x is stack-unreachable
 * GcFinalization.await(latch);
 * }
 *

  /** Reference to Finalizer.startFinalizer(). */
  private static final FinalizerStarter finalizerStarter;

  static {
    Class<?> finalizer = loadFinalizer(new SystemLoader(), new DecoupledLoader());
    finalizerStarter =
        finalizer != null
            ? new ReflectiveStarter(getStartFinalizer(finalizer))
            : new DirectStarter();
  }

  /** Reference to Finalizer.startFinalizer(). */
  private static final FinalizerStarter finalizerStarter;

  static {
    Class<?> finalizer = loadFinalizer(new SystemLoader(), new DecoupledLoader());
    finalizerStarter =
        finalizer != null
            ? new ReflectiveStarter(getStartFinalizer(finalizer))
            : new DirectStarter();
  }

# kernel registration - REGISTER_OP, REGISTER_KERNEL_BUILDER, etc.
#
# This setting is currently experimental. The 'v2' implementation does _not_
# correspond to a particular, finalized design; rather, it relates to
# developing one.
#
# The current aim of the 'v2' implementation is to allow 'unused' ops and
# kernels to be discarded by the linker (to the benefit of binary size).
bool_flag(

     *
     * 2) To detect when FinalizableReference's class loader has to be garbage collected, at which
     * point, Finalizer can stop running
     */

    Finalizer finalizer = new Finalizer(finalizableReferenceClass, queue, frqReference);
    String threadName = "com.google.common.base.internal.Finalizer";
    Thread thread = null;
    if (bigThreadConstructor != null) {
      try {
        boolean inheritThreadLocals = false;

     *
     * 2) To detect when FinalizableReference's class loader has to be garbage collected, at which
     * point, Finalizer can stop running
     */

    Finalizer finalizer = new Finalizer(finalizableReferenceClass, queue, frqReference);
    String threadName = "com.google.common.base.internal.Finalizer";
    Thread thread = null;
    if (bigThreadConstructor != null) {
      try {
        boolean inheritThreadLocals = false;

Ao invés disso, sendo um sistema "assíncrono", uma vez finalizada, a tarefa pode esperar na fila um pouco (alguns microssegundos) para que o computador / programa finalize o que quer que esteja fazendo, e então volte para pegar o resultado e continue trabalhando com ele.

  public void testAwait_countDownLatch() {
    CountDownLatch latch = new CountDownLatch(1);
    Object unused =
        new Object() {
          @SuppressWarnings({"removal", "Finalize"}) // b/487687332
          @Override
          protected void finalize() {
            latch.countDown();
          }
        };
    unused = null; // Hint to the JIT that unused is unreachable
    GcFinalization.await(latch);

  @Test
  public void testGetFinalizerUrl() {
    assertThat(getClass().getResource("internal/Finalizer.class")).isNotNull();
  }

  @Test
  public void testFinalizeClassHasNoNestedClasses() throws Exception {
    // Ensure that the Finalizer class has no nested classes.
    // See https://github.com/google/guava/issues/1505
    assertThat(Finalizer.class.getDeclaredClasses()).isEmpty();
  }