How to deal with Singleton along with Serialization

Question

Consider I have a Singleton class defined as follows.

public class MySingleton implements Serializable{
 private static MySingleton myInstance;

 private MyS         


        

Answer 1

Here is the Answer for Breaking the Singleton class and and how to prevent our class from creating different object by using readResolve() methood;

import java.io.Serializable;

public class Singleton implements Serializable {

private static final long serialVersionUID = 1L;

private Singleton() {
}

private static class SingletonHelper {

    private static final Singleton INSTANCE = new Singleton();

}

public static Singleton getInstance() {

    return SingletonHelper.INSTANCE;
}

private Object readResolve() {
    Singleton instance = getInstance();
    return instance;
}

}

public class BreakSIngletonUsingSerialization {

public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException {

    Singleton demo1 =Singleton.getInstance();
    ObjectOutput out = new ObjectOutputStream(new FileOutputStream("C:/Eclipse/serial.ser"));
    out.writeObject(demo1);
    Singleton demo2 =null;
    ObjectInput in = new ObjectInputStream(new FileInputStream("C:/Eclipse/serial.ser"));

    demo2 = (Singleton)in.readObject();

    System.out.println("Hascode demo1 : " +demo1);
    System.out.println("Hascode demo2 : " +demo2);
}

}