x.set(i, (double) -i);
    }
    AtomicDoubleArray y = serialClone(x);
    assertTrue(x != y);
    assertEquals(x.length(), y.length());
    for (int i = 0; i < SIZE; i++) {
      assertBitEquals(x.get(i), y.get(i));
    }

    AtomicDoubleArray a = new AtomicDoubleArray(VALUES);
    AtomicDoubleArray b = serialClone(a);
    assertFalse(a.equals(b));
    assertFalse(b.equals(a));