The equals method in AtomicInteger and AtomicLong returns true only if two instances are
identical, not if they represent the same number value.
This is because equals is not part of the API contract of these classes, and they do not override the method inherited from
java.lang.Object. Although both classes implement the Number interface, assertions about equals comparing
number values are not part of that interface either. Only the API contract of implementing classes like Integer, Long,
Float, BigInteger, etc., provides such assertions.
