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Java code to explain effect of // Serialization on singleton classes

Deepika Sahu answered on December 25, 2022 Popularity 1/10 Helpfulness 1/10

answer Java code to explain effect of // Serialization on singleton classes

Java code to explain effect of // Serialization on singleton classes

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// Java code to remove the effect of
// Serialization on singleton classes
 
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.io.Serializable;
 
class Singleton implements Serializable {
 
    // public instance initialized when loading the class
    public static Singleton instance = new Singleton();
 
    private Singleton()
    {
        // private constructor
    }
 
    // implement readResolve method
    protected Object readResolve() { return instance; }
}
 
public class GFG {
 
    public static void main(String[] args)
    {
        try {
            Singleton instance1 = Singleton.instance;
            ObjectOutput out = new ObjectOutputStream(
                new FileOutputStream("file.text"));
           
            out.writeObject(instance1);
            out.close();
 
            // deserialize from file to object
            ObjectInput in = new ObjectInputStream(
                new FileInputStream("file.text"));
            Singleton instance2
                = (Singleton)in.readObject();
            in.close();
 
            System.out.println("instance1 hashCode:- "
                               + instance1.hashCode());
            System.out.println("instance2 hashCode:- "
                               + instance2.hashCode());
        }
 
        catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Popularity 1/10 Helpfulness 1/10 Language java

Source: www.geeksforgeeks.org

Tags: effect explain java serialization singleton

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Contributed on Dec 25 2022

Deepika Sahu

0 Answers Avg Quality 2/10

Java code to explain effect of // Serialization on singleton classes

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