import java.io.*;

public class SerializationDemo {
    public static void main(String args[]) {

        // Object serialization
        try {
            MyClass object1 = new MyClass("Hello", -7, 2.7e10);
            System.out.println("object1: " + object1);
            FileOutputStream fos = new FileOutputStream("serial");
            ObjectOutputStream oos = new ObjectOutputStream(fos);
            oos.writeObject(object1);
            oos.flush();
            oos.close();
        } catch (IOException e) {
            System.out.println("Exception during serialization: " + e);
            System.exit(0);
        }

        // Object deserialization
        try {
            MyClass object2;
            FileInputStream fis = new FileInputStream("serial");
            ObjectInputStream ois = new ObjectInputStream(fis);
            object2 = (MyClass) ois.readObject();
            ois.close();
            System.out.println("object2: " + object2);
        } catch (Exception e) {
            System.out.println("Exception during deserialization: " + e);
            System.exit(0);
        }
    }
}

class MyClass implements Serializable {
    String s;
    int i;
    double d;

    public MyClass(String s, int i, double d) {
        this.s = s;
        this.i = i;
        this.d = d;
    }

    public String toString() {
        return "s=" + s + "; i=" + i + "; d=" + d;
    }
}