interface Manager{
  void manageIt(int price);
  Manager setNextManager(Manager manager);
}
abstract class AbstractManager implements Manager{
  protected Manager next;
  Manager setNextManager(Manager manager){
    this.next=manager;
  }
}

class ManagerOne extends AbstractManager{
  void manageIt(int price){
    if(price<=100){
      debug("here is One.I can manage it,do not post next,stop here");
    }else{
      next.manageIt(price);
    }
  }
}
class ManagerTwo extends AbstractManager{
  void manageIt(int price){
    if(price<=1000){
      debug("here is Two.");
    }else{
      next.manageIt(price);
    }
  }
}
class ManagerThree extends AbstractManager{
  void manageIt(int price){
    if(price<=10000){
      debug("here is Three.");
    }else{
      next.manageIt(price);
    }
  }
}
class ManagerLast extends AbstractManager{
  void manageIt(int price){
    if(price>10000){
      debug("here is Last.");
    }else{
      debug("What happened?why here?");
      throw new RuntimeException();
    }
  }
}

class Client{
  //invoke it before
  void init(){
    Manager one=new ManagerOne();
    Manager two=new ManagerTwo();
    Manager three=new ManagerThree();
    Manager last=new ManagerLast();
    one.setNextManager(two);
    two.setNextManager(three);
    three.setNextManager(last);
  }
  void test(){
    //数字200发言:其实我不知道到底哪个环在处理我，只要从第一个开始就可以了
    //它处理不了我也不知道，反正有一个环处理了，或者到最后扔回来一个异常。
    one.manageIt(200);
  }
}