Understanding Java Singleton with Example

Singleton

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Singleton is a design pattern purpose is to control object creation. Which means limiting the number of objects to only one.


Example

1. public class Singleton {
2. 
   
3.    private static Singleton singleton = null;
4.    
5.    //Private Constructor
6.    private Singleton() {
7. 
   
8.    }
9. 
   
10.    public static Singleton getInstance() {
11.       if(singleton == null) {
12.          singleton = new Singleton();
13.       }
14.       return singleton;
15.    }
16. }