Serializable

Serializable is a marker interface. (A marker interface is one without any method). The classes that do not implement this interface will not have any of their states serialized or deserialized. Serialization is the process of converting an object into byte stream, so that it can be transferred over a network and stored into a persistent medium such as a file.

Serialization is the process of converting the state of an object into a form that can be transported or stored. In this process, an object's state is written to a temporary or persistent storage. Later, the object can be recreated by deserializing or reading the object's state from the storage.