Adaptor for covariant iterators in Java

CovariantIterator.java

import java.util.Iterator;

public class CovariantIterator<T extends U, U> implements Iterator<U>
{
	private Iterator<T> iter;

	public CovariantIterator(Iterator<T> it)
	{
		this.iter = it;
	}

	public CovariantIterator(Iterable<T> it)
	{
		this(it.iterator());
	}

	@Override
	public boolean hasNext()
	{
		return this.iter.hasNext();
	}

	@Override
	public U next()
	{
		return (U) this.iter.next();
	}

	@Override
	public void remove()
	{
		this.iter.remove();
	}
}