Happy Birthday Wishes My Boss

Singleton: Singleton in Java Enhanced

Singleton, I presented in my previous entry is the most common implementation of a Singleton, but still has some defects, among them is that if we do that class serializable in every run would create different levels of singleton and would have to create a method to protect it. And we also have the problem that you can access the private constructor using the Reflection API. So here's a more elegant way to create a Singleton:

 
 
 
 Singleton {public enum 
 
 INSTANCE; 
 
 public void doSomething () {} 
 
 
 
} 
 
 
 

And then when you would like to use, all you would have to do is this:

 
 
 public class Main {public static void 
 
 main (String [] args) {
 Singleton.INSTANCE.doSomething (); 
}} 
 
 
 
 

And with that we have a better and simpler implementation of a Singleton ensures that we will always be a single instance.
saludoss!

References:

Blooch, J. Effective Java 2nd Edition