package java.util;

public abstract class AbstractSet extends AbstractCollection implements Set
	{
		protected AbstractSet()
			{
			}

		public boolean equals(Object o)
			{
				if(this==o)
					return true;
				if(o==null)
					return false;
				if(!(o instanceof Set))
					return false;
				if(((Set)o).size()!=size())
					return false;
				return containsAll((Collection)o);
			}

		public int hashCode()
			{
				int hashCode=0;
				Iterator it=iterator();
				while(it.hasNext())
					{
						Object o=it.next();
						if(o!=null)
						  hashCode+=o.hashCode();
					}
				return hashCode;
			}
	}
