directory.java

OOAD,加油

package ooad.composite;
import java.util.*;
public class Directory extends Element{
	private HashSet<Element> content=new HashSet<Element>(); 
	
	public void addElement(Element e){
		content.add(e);
	}

	public int getLength() {
		int sum=0;
		for(Element e:content){
			sum+=e.getLength();
		}
		return sum;
	}
}