Sky2

package weather;

import java.util.ArrayList;

public class Sky2<Cloud> extends ArrayList<Cloud>{
	private ArrayList<Cloud> clouds;
	public float getMeanHeight() {
		float average = 0;
		for(int i=0;i<=2;i++) {

			average=average+((weather.Cloud) clouds.get(i)).getHeight();
		}
		average /= clouds.size();
		return average;
	}

	public static void main(String[] args)
	{
		StratusCloud strat = new StratusCloud(100, 1000);
		if (!strat.rain().startsWith("It is raining"))
			System.out .println("Bad StratusCloud::rain");
		CumulusCloud cumu = new CumulusCloud(200, 2000);
		if (!cumu.rain().startsWith("It is raining"))
			System.out .println("Bad CumulusCloud::rain");
		CirrusCloud cirr = new CirrusCloud(300, 3000);
		if (!cirr.rain().startsWith("I cannot make"))
			System.out .println("Bad CirrusCloud::rain");
		Sky2 sky = new Sky2();
		sky.add(strat);
		sky.add(cumu);
		sky.add(cirr);
		float mean = sky.getMeanHeight();
		if (mean < 1799 || mean > 1801)
			System.out .println("Bad mean height: expected 1800, saw " + mean);
		System.out .println("Everything (else) is ok");
	}
}