Method work

concurrent/Machina.java:18–25

(Machina m)

  private final int id;
  public Machina(int id) { this.id = id; }
  public static Machina work(Machina m) {
    if(!m.state.equals(State.END)){
      new Nap(0.1);
      m.state = m.state.step();
    }
    System.out.println(m);
    return m;
  }
  @Override public String toString() {
    return "Machina" + id + ": " +
      (state.equals(State.END)? "complete" : state);