Singleton example

Singleton.java

class Singleton {
	
	private static Singleton instance;

	private Singleton() {
		
	}

	/**
	 * Reference: http://stackoverflow.com/tags/singleton/info
	 */
	public static Singleton getinstance() {
		if (instance == null) {
			synchronized (Singleton.class){
				if (instance == null) {
					instance = new Singleton();
				}
			}
		}
		return instance;
	}

	public void print() {
		System.out.println("Singleton Class!");
	}

}

SingletonTest.java

class SingletonTest {

	public static void main(String[] args) {
		Singleton singleton = Singleton.getinstance();
		singleton.print();
	}
}