Simple Singleton Example in Java

TestSing.java

import java.io.*;
import java.util.*;

class Singleton {
    private static Singleton _Instance;

    private Singleton()
    {
    }

    public static Singleton GetInstance()
    {
        if (_Instance == null)
            _Instance = new Singleton();
        return _Instance;
    }

    public void PrintHello()
    {
        System.out.println("Hello");
    }
}

public class TestSing {
	public static void main (String args[]){
		Singleton s = Singleton.GetInstance();
		//SAME INSTANCE
		Singleton a = Singleton.GetInstance();
		s.PrintHello();
	}
}