heatindexdisplay.java

设计模式中的Observer模式。有一气象台例子说明。

package DP.Chapter2;

public class HeatIndexDisplay implements Observer, DisplayElement {

	private float temperature;
	private float humidity;
	private Subject weatherData;
	private float heatindex=temperature+humidity;
	
	public HeatIndexDisplay(Subject weatherData) {
		this.weatherData = weatherData;
		weatherData.registerObserver(this);
	}
	public void update(float temp, float humidity, float pressure) {
		this.temperature = temp;
		this.humidity = humidity;
		display();

	}

	public void display() {
		System.out.print(heatindex);

	}

}