public class ConcreteObserver extends Observer{
  private String name;
  private String observerState;
  private ConcreteSubject subject;

  public ConcreteObserver(ConcreteSubject subject , String name) {
    this.subject = subject;
    this.name = name;
  }

  public void update() {
    observerState = subject.getSubjectState();
    System.out.println("Observer " + name + "が新しい状態になりました");
  }


  public ConcreteSubject getSubject() {
    return subject;
  }
  public void setSubject(ConcreteSubject subject) {
    this.subject = subject;
  }
}