how can we have a serializable object?

Question

Hi, I have a question that for example I have a GameStartegy class that has 53 fields and the type of all is one interface for example Strategy and one of these fields are Date and the will be initialized when we create an object,how can i create a Serializable object ?? should I serialize all fields like Date? thanks

Answer 1

As long as the class implements the Serializable interface, it is serializable.

Here's an introduction to serialization in java:

http://www.javacoffeebreak.com/articles/serialization/index.html

Answer 2

First you need to implement serializable interface which is mark up interface once you class implements that interface then you can have Serilizable objects...

Answer 3

Okay, java.util.Date is Serializable, so that shouldn't be a problem.

If you have member fields that you don't need to save, you can make them transient Transient members don't get serialized. So you can have class like this

class A implements Serializable{
   int a;
   transient NonSerialzableObject n;
}

That should work.

You can also create custom serialization functions by implementing the following functions:

 private void writeObject(java.io.ObjectOutputStream out) throws IOException
 private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException;