烤肉点单命令模式实现

//抽象命令
public abstract class Command {
    protected Barbecuer receiver;
    public Command(Barbecuer receiver){
        this.receiver=receiver;
    }
//    执行命令
    abstract public void ExcuteCommand();
}
// 烤肉串者   具体的命令
public class Barbecuer {
//    烤羊肉
    public void BakeMutton(){
        System.out.println("烤羊肉串!");
    }
//    烤鸡翅
    public void BakeChickenWing(){
        System.out.println("烤鸡翅!");
    }
}
// 烤羊肉串命令  与实现分离
public class BakeMuttonCommand  extends Command{
    public BakeMuttonCommand(Barbecuer receiver) {
        super(receiver);
        // TODO Auto-generated constructor stub
    }
    @Override
    public void ExcuteCommand() {
         receiver.BakeMutton();
    }
}
// 烤鸡翅命令
public class BakeChickenWingCommand  extends Command{
    public BakeChickenWingCommand(Barbecuer receiver) {
        super(receiver);
        // TODO Auto-generated constructor stub
    }
    @Override
    public void ExcuteCommand() {
        receiver.BakeChickenWing();
    }
}
// 服务员执行请求
public class Waiter {
    private ArrayList<Command> orders=new ArrayList<Command>();
//  设置订单
    public void SetOrder(Command command){
        orders.add(command);
        Date date = new Date();
        SimpleDateFormat dateFormat= new SimpleDateFormat("yyyy-MM-dd :hh:mm:ss");
        System.out.println("增加订单"+command.toString()+"时间："+dateFormat.format(date));
    }
//  取消订单
    public void CancelOrder(Command command){
        orders.remove(command);
        Date date = new Date();
        SimpleDateFormat dateFormat= new SimpleDateFormat("yyyy-MM-dd :hh:mm:ss");
        System.out.println("取消订单"+command.toString()+"时间："+dateFormat.format(date));
    }
//    全部执行
    public void Notify(){
        for (Command command : orders) {
            command.ExcuteCommand();
        }
    }
}
public class Test {
    public static void main(String[] args) {
//        开店前准备
        Barbecuer barbecuer =new Barbecuer();
        Command bakeMuttonCommand = new BakeMuttonCommand(barbecuer);
        Command bakeChickenWingCommand = new BakeChickenWingCommand(barbecuer);
        Waiter girl = new Waiter()
//        开门营业 顾客点菜
        girl.SetOrder(bakeMuttonCommand);
        girl.SetOrder(bakeChickenWingCommand);
//        取消订单
        girl.CancelOrder(bakeChickenWingCommand);
//        点单完毕，通知厨房
        girl.Notify();
    }
}