Regarding Serializable and subclasses.

Question

I have a an abstract parent class called 'Information'
which implements Serializable and which has an abstract
method called init().
There are 2 subclasses that extend the parent class Information
called SInformation_1 and SInformation_2 and implement the method init().
Now as the parent class is Serialized,will the concrete subclasses
also be Serializable?

Answer 1

How long does it take to write a demo?
import java.io.*;
abstract class Base implements Serializable {
    public abstract void init();
class D1 extends Base {
    public void init() {}
class D2 extends Base {
    public void init() {}
public class SerializableExample {
    public static void main(String[] args) throws IOException, ClassNotFoundException {
        Base obj1 = new D1();
        Base obj2 = new D2();
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream out = new ObjectOutputStream(baos);
        out.writeObject(obj1);
        out.writeObject(obj2);
        out.flush();
        out.close();
        ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
        ObjectInputStream in = new ObjectInputStream(bais);
        D1 d1 = (D1) in.readObject();
        D2 d2 = (D2) in.readObject();
}