63 lines
1.7 KiB
Java
63 lines
1.7 KiB
Java
// serialization/Logon.java
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// (c)2017 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// Demonstrates the "transient" keyword
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import java.util.concurrent.*;
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import java.io.*;
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import java.util.*;
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import onjava.Nap;
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public class Logon implements Serializable {
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private Date date = new Date();
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private String username;
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private transient String password;
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public Logon(String name, String pwd) {
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username = name;
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password = pwd;
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}
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@Override
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public String toString() {
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return "logon info: \n username: " +
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username + "\n date: " + date +
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"\n password: " + password;
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}
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public static void main(String[] args) {
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Logon a = new Logon("Hulk", "myLittlePony");
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System.out.println("logon a = " + a);
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try(
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ObjectOutputStream o =
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new ObjectOutputStream(
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new FileOutputStream("Logon.dat"))
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) {
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o.writeObject(a);
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} catch(IOException e) {
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throw new RuntimeException(e);
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}
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new Nap(1);
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// Now get them back:
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try(
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ObjectInputStream in = new ObjectInputStream(
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new FileInputStream("Logon.dat"))
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) {
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System.out.println(
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"Recovering object at " + new Date());
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a = (Logon)in.readObject();
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} catch(IOException | ClassNotFoundException e) {
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throw new RuntimeException(e);
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}
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System.out.println("logon a = " + a);
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}
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}
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/* Output:
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logon a = logon info:
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username: Hulk
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date: Tue May 09 06:07:47 MDT 2017
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password: myLittlePony
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Recovering object at Tue May 09 06:07:49 MDT 2017
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logon a = logon info:
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username: Hulk
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date: Tue May 09 06:07:47 MDT 2017
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password: null
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*/
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