singleton-code1

class Singleton {

	private static Singleton instance = null;
	public String s;
	private Singleton()
	{
		s = "hey i am ston";
	}

	public static Singleton getInstance()
	{
		if (instance == null)
			instance = new Singleton();

		return instance;
	}
}

class GFG {
	public static void main(String args[])
	{
		Singleton x = Singleton.getInstance();
		Singleton y = Singleton.getInstance();
		Singleton z = Singleton.getInstance();

		System.out.println("Hashcode of x is " + x.hashCode());
		System.out.println("Hashcode of y is " + y.hashCode());
		System.out.println("Hashcode of z is " + z.hashCode());

		// Condition check
		if (x == y && y == z) {
			System.out.println( "Three objects point to the same memory location on the heap i.e, to the same object");
		}

		else {
			System.out.println("Three objects DO NOT point to the same memory location on the heap");
		}
	}
}

OUTPUT:
----------

Hashcode of x is 876908723
Hashcode of y is 876908723
Hashcode of z is 876908723
Three objects point to the same memory location on the heap i.e, to the same object