53 lines
1.5 KiB
Java
53 lines
1.5 KiB
Java
// serialization/Logon.java
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// (c)2016 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://mindviewinc.com/Books/OnJava/ 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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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: " + username +
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"\n date: " + date + "\n password: " + password;
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}
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public static void
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main(String[] args) throws Exception {
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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(ObjectOutputStream o = new ObjectOutputStream(
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new FileOutputStream("Logon.dat"))) {
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o.writeObject(a);
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}
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TimeUnit.SECONDS.sleep(1); // Delay
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// Now get them back:
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try(ObjectInputStream in = new ObjectInputStream(
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new FileInputStream("Logon.dat"))) {
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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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}
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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 Dec 08 16:09:48 PST 2015
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password: myLittlePony
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Recovering object at Tue Dec 08 16:09:49 PST 2015
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logon a = logon info:
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username: Hulk
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date: Tue Dec 08 16:09:48 PST 2015
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password: null
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*/
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