// package test;

import java.io.ByteArrayOutputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamField;
import java.io.Serializable;


class mySerializable implements Serializable {

    private int f;
    private int g;

    private static final ObjectStreamField[] serialPersistentFields = {
            new ObjectStreamField("f", int.class),
            new ObjectStreamField("g", int.class),
    };

    public static void main(String[] args) {

        save();

    }
    public static void save() {
        try {
             ByteArrayOutputStream fileOut = new ByteArrayOutputStream();
             ObjectOutputStream out = new ObjectOutputStream(fileOut);
             out.writeObject(new mySerializable());
             out.close();
             fileOut.close();
        } catch (Exception ex) {
            System.out.println("save()" + ex.getLocalizedMessage());        }
    }
}