观察者模式实现2--事件

来源：互联网发布：java asm 修改方法编辑：程序博客网时间：2024/04/29 02:42

     public class ObserverA
    {
        private float temperature;
        private float humidity;
        public ObserverA()
        { }
        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
    {
        private float temperature;
        private float humdity;
        private float pressure;

        public void setMeasurements(float temperature, float humidity, float pressure)
        {
            this.temperature = temperature;
            this.humdity = humidity;
            this.pressure = pressure;
            if (notiflyEvent != null)
            {
                notiflyEvent(temperature, humdity, pressure);
            }
        }
        public delegate void handler(float temperature, float humidity, float pressure);
        public event handler notiflyEvent;
    }
    class Program
    {
        static void Main(string[] args)
        {
            Weatherdata data = new Weatherdata();
            ObserverA oa = new ObserverA();
            data.notiflyEvent += new Weatherdata.handler(oa.update);
            data.setMeasurements(80, 60, 40);
            Console.Read();
        }
    }