SingletonLazy

class SingletonLazy{  
   private static SingletonLazy mSingletonLazy;  
   private SingletonLazy(){}  
   
   public static SingletonLazy getSingletonLazy(){  
     if (mSingletonLazy == null){   
         mSingletonLazy = new SingletonLazy();//instance will be created at request time               
     }  
    return mSingletonLazy;  
   }  
  
   public void doSomething(){  
     //write your code  
   }  
}