CSC403: Put: Don't forget your children! [7/9]

    public void put (int key) {
        root = put (root, key);
    }
    private static Node put (Node x, int key) {
        if (x == null)
            return new Node (key);
        if (key < x.key)
            put (x.left,  key);
        else if (key > x.key)
            put (x.right, key);
        //...
    }

This is kind of what we want.

Does it work?