public static void main(String[] args) {
Subject subject = new MySubject();
Observer observer1 = new MyObserver(1);
Observer observer2 = new MyObserver(2);
Observer observer3 = new MyObserver(3);
subject.attach(observer1);
subject.attach(observer2);
subject.attach(observer3);
subject.notice();
subject.detach(observer1);
subject.notice();
}
public static void main(String[] args) {
Subject subject = new TeacherSubject();
subject.attach(new Stu1Observer());
subject.attach(new Stu2Observer());
subject.publish();
}
public HexaObserver(Subject subject) {
this.subject = subject;
subject.attach(this);
}