常用方法
常用方法
常用方法
常用方法
public static void main(String[] args) { Subject subject = new MySubject(); subject.add(new Observer1()); subject.add(new Observer2()); subject.operation(); }
public static void main(String[] args) { Subject subject = new MySubject(); subject.add(new Observer1()); subject.add(new Observer2()); subject.operation(); }