On the serialization of J2SE in the encounter of inheritance

j2se| inheritance
The results of the operation prove that this method is correct. Here we use the Writeobject/readobject method, which, if it exists, is invoked when serialized, in place of the default behavior (which is discussed later, so much more). When we serialize, we first invoke the ObjectOutputStream Defaultwriteobject, which uses the default serialization behavior and then serializes the domain of the parent class, as well as when deserializing.

Sum up:

Purpose behavior

For a parent class that implements the Serializable interface, write a subclass subclass that can be serialized to automatically serialize

For a parent class that does not implement the Serializable interface, write a subclass of 1 that can be serialized, a parent class that has an constructor;2, a subclass that serializes itself, and the subclass is responsible for serializing the domain of the parent class