Create a public class BinaryTreeToList
that provides a single static
method toList
.
toList
accepts a BinaryTree
and returns a List<Object>
containing all of the values in the tree, in any
order.
Our suggestion is to have toList
create the list and then call a private recursive helper method to populate the
list.
If the tree passed to toList
is null
you should throw an IllegalArgumentException
.
You will need to import cs125.trees.BinaryTree
, as well as List
and a List
implementation (probably
ArrayList
) from java.util
.
We've provided some code to get you started.
For reference, cs125.trees.BinaryTree
has the following public properties:
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