OnJava8-Examples/serialization/SerialCtl.java at master · xinan-w/OnJava8-Examples · GitHub

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// serialization/SerialCtl.java

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

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

// 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) {

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

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

try (

ByteArrayOutputStream buf =

new ByteArrayOutputStream();

ObjectOutputStream o =

new ObjectOutputStream(buf);

) {

o.writeObject(sc);

// Now get it back:

try (

ObjectInputStream in =

new ObjectInputStream(

new ByteArrayInputStream(

buf.toByteArray()));

) {

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

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

}

} catch(IOException | ClassNotFoundException e) {

throw new RuntimeException(e);

}

/* Output:

Before:

Not Transient: Test1

Transient: Test2

After:

Not Transient: Test1

Transient: Test2

OnJava8-Examples/serialization/SerialCtl.java at master · xinan-w/OnJava8-Examples · GitHub

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