Serialization Code from K&B Book

[Srinivas Katta]

Hi All,

I have executed the below code

import java.io.*;
class Player {
Player() { System.out.print("p"); }
}
class CardPlayer extends Player implements Serializable {
CardPlayer() { System.out.print("c"); }
public static void main(String[] args) {
CardPlayer c1 = new CardPlayer();
try {
FileOutputStream fos = new FileOutputStream("play.txt");
ObjectOutputStream os = new ObjectOutputStream(fos);
os.writeObject(c1);
os.close();
FileInputStream fis = new FileInputStream("play.txt");
ObjectInputStream is = new ObjectInputStream(fis);
CardPlayer c2 = (CardPlayer) is.readObject();
is.close();
} catch (Exception x ) { }
}
}

and the result is "pcp" as per the book.

But I remember from the book " When an instance of
a serializable class is deserialized, the constructor does not run, and instance variables
are NOT given their initially assigned values!"

If the above is true the result should print as "p" only

Please let me know if anybody have different understanding

Thanks
Srinivas

[Abimaran Kugathasan]

Please UseCodeTags when you post question.

When you create an instance of CardPlayer c1, pc will be printed and when you deserialized, sine your super Player class doesn't implement Serializable, so its Constructor will be invoked.