OnJava8-Examples/serialization/SerialCtl.java at 0edda160671ea991224c81422a8ec7a2d2049322 · Java-Edge/OnJava8-Examples

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// serialization/SerialCtl.java

// Controlling serialization by adding your own

// writeObject() and readObject() methods.

import java.io.*;

public class SerialCtl implements Serializable {

private String a;

private transient String b;

public SerialCtl(String aa, String bb) {

a = "Not Transient: " + aa;

b = "Transient: " + bb;

}

@Override

public String toString() { return a + "\n" + b; }

private void writeObject(ObjectOutputStream stream)

throws IOException {

stream.defaultWriteObject();

stream.writeObject(b);

}

private void readObject(ObjectInputStream stream)

throws IOException, ClassNotFoundException {

stream.defaultReadObject();

b = (String)stream.readObject();

}

public static void main(String[] args)

throws IOException, ClassNotFoundException {

SerialCtl sc = new SerialCtl("Test1", "Test2");

System.out.println("Before:\n" + sc);

ByteArrayOutputStream buf= new ByteArrayOutputStream();

ObjectOutputStream o = new ObjectOutputStream(buf);

o.writeObject(sc);

// Now get it back:

ObjectInputStream in = new ObjectInputStream(

new ByteArrayInputStream(buf.toByteArray()));

SerialCtl sc2 = (SerialCtl)in.readObject();

System.out.println("After:\n" + sc2);

}

/* Output:

Before:

Not Transient: Test1

Transient: Test2

After:

Not Transient: Test1

Transient: Test2

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