LinkedBinaryTree.java

import java.util.Iterator;

import javax.lang.model.util.Elements;


public class LinkedBinaryTree implements BinaryTree{
	private BTNode root;	//reference to the root
	private int size;		//number of nodes

	public LinkedBinaryTree(){
		root = null;
		size = 0;
	}

	public Iterator iterator()
	{
		Iterable<Position> positions = positions();
		PositionalList elements = new PositionalList();
		for(Position pos: positions)
			elements.addLast(pos.getElement());			//can we use getElement?.... it was element() in ques
		return elements.iterator();
	}

	//How can I implement Iterable
}