public class SingletonPattern
    {
    private static SingletonPattern OnlyOneObject;
    private SingletonPattern()
        {
		    System.out.println("Created instance of Class");
        }
    public static SingletonPattern CreateSingleton()
        {
            if (OnlyOneObject == null)
                {
               		OnlyOneObject = new SingletonPattern();
                } else {
			        System.out.println("** Already one instance created **");
		        }
              return OnlyOneObject;
        }
    public static void main(String [] args)
        {
        SingletonPattern P01 = SingletonPattern.CreateSingleton();
        SingletonPattern P02 = SingletonPattern.CreateSingleton();
        System.out.println(P01);
        System.out.println(P02);
       }
    }