public class AtomicDouble extends Number {
  private static final long serialVersionUID = 0L;

  private transient volatile long value;

  private static final AtomicLongFieldUpdater<AtomicDouble> updater =
      AtomicLongFieldUpdater.newUpdater(AtomicDouble.class, "value");

  /**
   * Creates a new {@code AtomicDouble} with the given initial value.
   *
   * @param initialValue the initial value
   */