package com.iluwatar; import java.util.Stack; public class App { public static void main( String[] args ) { Stack states = new Stack<>(); Star star = new Star(StarType.SUN, 10000000, 500000); System.out.println(star); states.add(star.getMemento()); star.timePasses(); System.out.println(star); states.add(star.getMemento()); star.timePasses(); System.out.println(star); states.add(star.getMemento()); star.timePasses(); System.out.println(star); states.add(star.getMemento()); star.timePasses(); System.out.println(star); while (states.size() > 0) { star.setMemento(states.pop()); System.out.println(star); } } }