Design-Patterns-Java/Singleton/SingletonPattern.java at main · riyadomf/Design-Patterns-Java · GitHub

28 lines (23 loc) · 718 Bytes

class Singleton{

private volatile static Singleton uniqueInstance;

private Singleton(){};

public static Singleton getInstance(){

if(uniqueInstance==null) {

synchronized(Singleton.class){

if(uniqueInstance==null) {

uniqueInstance = new Singleton();

}

return uniqueInstance;

}

public class SingletonPattern{

public static void main(String[] args){

Singleton s = Singleton.getInstance();

Singleton t = Singleton.getInstance();

System.out.println(s );

System.out.println(t);

if(s == t) System.out.println("Singleton proved!!");

}

Expand file tree