package javadevjournal.design.creational.singleton; /** * @author Kunwar */ public class SingletonPatternDemo { public static void main(String[] args) { /* Let's create 3 objects and see their hashcode and they will be same. */ System.out.println("in single threaded environment"); Singleton singleton1 = Singleton.getInstance(); Singleton singleton2 = Singleton.getInstance(); Singleton singleton3 = Singleton.getInstance(); System.out.println(singleton1.hashCode() +" "+ singleton2.hashCode() +" "+ singleton3.hashCode()); System.out.println("in multi threaded environment"); Thread1 t1 = new Thread1(); t1.run(); Thread2 t2 = new Thread2(); t2.run(); Thread3 t3 = new Thread3(); t3.run(); } }