Storing postorder sequence in array
<p>In the code below, the nodes of a postorder tree traversal is always printed
I m wondering if there is a way to store these nodes in the postorder sequence in an array
Do i have to do the traversal in a iterative way?</p>

<pre><code>public static void postOrder(TreeNode root) {
  if (root != null) {
    postOrder(root.left);
    postOrder(root.right);
    System.out.print(root.item + "  ");
  } else {
    return;
  }
}
</code></pre>
