观察者模式实现1

来源：互联网发布：java asm 修改方法编辑：程序博客网时间：2024/04/28 08:03

     public interface ISubject
    {
        void register(IObserver o);
        void remove(IObserver o);
        void notify();
    }
    public interface IObserver
    {
        void update(float temp,float humidity,float pressure);
    }
    public class ObserverA:IObserver
    {
        private float temperature;
        private float humidity;
        private ISubject iweatherData;
        public ObserverA(ISubject iweatherData)
        {
            this.iweatherData = iweatherData;
            iweatherData.register(this);
        }
        public void update(float temperature, float humidity, float pressure)
        {
            this.temperature = temperature;
            this.humidity = humidity;
            display();
        }
        public void display()
        {
            Console.WriteLine("temperature:" + temperature);
        }
    }
    public class Weatherdata : ISubject
    {
        private List<IObserver> observers;
        private float temperature;
        private float humdity;
        private float pressure;

        public Weatherdata()
        {
            observers = new List<IObserver>();
        }
        public void register(IObserver o)
        {
            observers.Add(o);
        }
        public void remove(IObserver o)
        {
            observers.Remove(o);
        }
        public void notify()
        {
            for (int i = 0; i < observers.Count; i++)
            {
                IObserver observer = observers[i];
                observer.update(temperature, humdity, pressure);
            }
        }
        public void setMeasurements(float temperature, float humidity, float pressure)
        {
            this.temperature = temperature;
            this.humdity = humidity;
            this.pressure = pressure;
            notify();
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Weatherdata data = new Weatherdata();
            ObserverA oa = new ObserverA(data);
            data.setMeasurements(80, 60, 40);
            Console.Read();
        }
    }