Guava’s Objects Class: Equals, HashCode, and ToString how-to Oct 24, 2011 6 mins Core Java ...

One down side that occasionally manifests itself as an issue is the lack of toString (), equals (Object), and hashCode () method implementations in default JAXB-generated objects.

As Oracle states, "A record declaration specifies in a header a description of its contents; the appropriate accessors, constructor, equals, hashCode, and toString methods are created automatically.