binary « iterator « Java Collection Q&A

1. Java binary tree which return type for iterator over nodes, interface or class?    stackoverflow.com

I'm writing a class for a binary tree, and in the tree interface this function is defined:

/** Returns an iterable collection of the the nodes. */
    public Iterable<Position<E>> ...

2. PostOder Iterator in a Binary Search Tree    forums.oracle.com

} } but it dos not work, it enters in a loop. The Item that i am using is an Integer. i am not understanding you while cicle: while(current==null) { stack.push(current); if(current.left==null) current=current.left; else current=current.right; } why do you want to push up current ? does that not enters in a loop ? other question , if the left is already ...