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Implementing a Serializable Singleton
In Singeton classes only one instance will be created.

Implementing a Serializable Singleton

In Singeton classes only one instance will be created. We are going to serialize the class. This can be done very easily. What we need to do is to implement a java.io.Serializable interface. We will use a method of Serializable interface that is readResolve().

readResolve(): It returns Object and throw ObjectStreamException

Code of the program is given below:


import java.io.*;

 

 public class SerializableSingleton implements java.io.Serializable {

   

    static SerializableSingleton singleton;

    protected SerializableSingleton() 

   {

       // Exists only to thwart instantiation.

     }

       private Object readResolve() 

   {

            return instancd;

   }

   public static void main(String args[])

     {

       singleton = new SerializableSingleton();

       singleton.readResolve();

     }

 }

Download this program

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Current Comments

2 comments so far (post your own) View All Comments Latest 10 Comments:

Optional single application instance enforcement and multiple startup notification
My application must only be started once. Existing application windows will be brought to the top if a user starts the application a second time.how is it possible with your excelsior, what type of navigations must be considerd in applying the above mentioned query.

Posted by Aparna on Tuesday, 01.23.07 @ 12:28pm | #4131

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Thanks for this wonderful program as it
has helped me a lot.

Posted by Ashutosh pandey on Sunday, 12.24.06 @ 12:01pm | #1540

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