(1) The methods are not declared in any class or interface. A class, that implements the Serializable interface and requires special special handling during the serialization and deserialization process must implement those methods and the serializer/deserializer will try to reflect those methods. This is one of the rather strange corners in Java where the API … Read more
What is recursive type bound This: <T extends Comparable<T>> Note that the type parameter T is also part of the signature of the super interface Comparable<T>. and how does the above piece of code help achieve mutual comparability? It ensures that you can only compare objects of type T. Without the type bound, Comparable compares … Read more
a raw type (Set) treats the type as if it had no generic type information at all. Note the subtle effect that not only will the type argument T be ignored, but also all other type arguments that methods of that type might have. You can add any value to it and it will always … Read more