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// : c12:Logon.java
// Demonstrates the "transient" keyword.
// {Clean: Logon.out}
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Date;
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;
}
public String toString() {
String pwd = (password == null) ? "(n/a)" : password;
return "logon info: \n username: " + username + "\n date: " + date
+ "\n password: " + pwd;
}
public static void main(String[] args) throws Exception {
Logon a = new Logon("Hulk", "myLittlePony");
System.out.println("logon a = " + a);
ObjectOutputStream o = new ObjectOutputStream(new FileOutputStream(
"Logon.out"));
o.writeObject(a);
o.close();
Thread.sleep(1000); // Delay for 1 second
// Now get them back:
ObjectInputStream in = new ObjectInputStream(new FileInputStream(
"Logon.out"));
System.out.println("Recovering object at " + new Date());
a = (Logon) in.readObject();
System.out.println("logon a = " + a);
}
} ///:~
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