[Collections][SUBMIT] TreeNode and friends

[Stephen Colebourne <st...@hotmail.com>]

Hi,
I have completed the updates proposed in the last discussion on trees. The
tree node code now contains:
TreeNode - a simple list based tree node interface
ArrayTreeNode - an implementation based on ArrayList
TreeUtils - a group of useful utilities for managing trees
TestArrayTreeNode - a test class

Re, previous discussion:
TreeIterator has been removed, but the functionality remains.
The iterator now does not restrict iteration only to depth first ordering.
Clone has been removed, but a copy constructor added instead.

Source code:
www.scolebourne.eurobell.co.uk/TreeNode2.zip

Stephen

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