// serialization/Logon.java

// (c)2017 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

// Demonstrates the "transient" keyword

import java.util.concurrent.*;

import java.io.*;

import java.util.*;

import onjava.Nap;

public class Logon implements Serializable {

private Date date = new Date();

private String username;

private transient String password;

public Logon(String name, String pwd) {

username = name;

password = pwd;

}

@Override

public String toString() {

return "logon info: \n username: " +

username + "\n date: " + date +

"\n password: " + password;

}

public static void main(String[] args) {

Logon a = new Logon("Hulk", "myLittlePony");

System.out.println("logon a = " + a);

try(

ObjectOutputStream o =

new ObjectOutputStream(

new FileOutputStream("Logon.dat"))

) {

o.writeObject(a);

} catch(IOException e) {

throw new RuntimeException(e);

}

new Nap(1);

// Now get them back:

try(

ObjectInputStream in = new ObjectInputStream(

new FileInputStream("Logon.dat"))

) {

System.out.println(

"Recovering object at " + new Date());

a = (Logon)in.readObject();

} catch(IOException | ClassNotFoundException e) {

throw new RuntimeException(e);

}

System.out.println("logon a = " + a);

}

}

/* Output:

logon a = logon info:

username: Hulk

date: Tue May 09 06:07:47 MDT 2017

password: myLittlePony

Recovering object at Tue May 09 06:07:49 MDT 2017

logon a = logon info:

username: Hulk

date: Tue May 09 06:07:47 MDT 2017

password: null

*/