Complex::main.java

final Scanner in = new Scanner(System.in);
System.out.println("Enter initial value of i: ");

while(!in.hasNextInt()){
    in.next();
}
int i = in.nextInt();
in.close();

int len = State.values().length;

IntStream stream = IntStream.iterate(i, (i) -> State.values()[(i%len + len)%len].update(i));
while ((i = stream.nextInt()) >= 0) {
    System.out.printf("i: %d%n", i);
}
System.out.printf("Final value is: %d", i);