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Re: Collection to implement linked structure traverse up and down

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On 11/28/2011 6:32 AM, Arved Sandstrom wrote:
> On 11-11-28 03:53 AM, ruds wrote:
>> Hi,
>> I want to implement a tree or a linked structure where I can traverse
>> to the parent of a node also and the same node refers to another data
>> related to it too.
>> for example i have a set [0,1,2,3,...10], consider these as levels,
>> so ) will be at top i.e the root, 1 will be first level, and so on.
>> each of these levels will again have some branches and some data needs
>> to be referenced with this too for comparison with another similar
>> tree of this kind. Also, once I get the comparion of the branch X done
>> I need to traverse to its parent level and it higher level.
>> I think TreeMapClass and LinkedHashMapClass will be helpfull to me in
>> this regard.
>> This need not be a tree, it can be a linked list too.
>> Please tell me am i on the right path? Kindly, suggest the
>> implementation too.
> 
> If I understand you correctly, one of your requirements is that each
> node of the data structure has associated user data, which is distinct
> from references to other nodes. This is common.
> 
> The distinguishing feature of a node for a singly linked list is that it
> has a reference to a "next" sibling. Nodes for doubly linked lists have
> two references, one to a "previous" sibling, one to a "next" sibling.
> Nodes for a binary tree have zero, one or two references, where any
> reference is to a "child". Any or all of these nodes can be implemented
> with objects that have not only the required references but also
> variable, user-defined data.
> 
> It's also helpful to distinguish between concept and implementation. At
> this stage we're talking concepts, and the language is clearly that of
> trees. In particular where you are talking about tree comparisons this
> is all very standard stuff...although your determination of how two
> trees compare will typically not start at the bottom.
> 
> I don't think TreeMap or LinkedHashMap will help you much. These are
> both maps. You can distort them into trees but that's not their intended
> purpose. If you're looking to locate a starting implementation you could
> do worse than use javax.swing.tree.TreeModel (implementation class
> javax.swing.tree.DefaultTreeModel) and javax.swing.tree.TreeNode
> (MutableTreeNode, DefaultMutableTreeNode). These are general purpose and
> don't have to be used with Swing at all.
> 
> AHS

In addition to javax.swing.tree.*, take a look at the org.w3c.dom.Node.

-- 
Wayne

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Collection to implement linked structure traverse up and down ruds <rudranee@gmail.com> - 2011-11-27 23:53 -0800
  Re: Collection to implement linked structure traverse up and down Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2011-11-28 07:32 -0400
    Re: Collection to implement linked structure traverse up and down Wayne <nospam@all.invalid> - 2011-12-01 10:39 -0500
      Re: Collection to implement linked structure traverse up and down ruds <rudranee@gmail.com> - 2011-12-04 23:57 -0800
        Re: Collection to implement linked structure traverse up and down Lew <lewbloch@gmail.com> - 2011-12-05 15:08 -0800
          Re: Collection to implement linked structure traverse up and down ruds <rudranee@gmail.com> - 2011-12-05 21:55 -0800
  Re: Collection to implement linked structure traverse up and down Roedy Green <see_website@mindprod.com.invalid> - 2011-11-29 17:01 -0800
    Re: Collection to implement linked structure traverse up and down Henk van Voorthuijsen <voorth@xs4all.nl> - 2011-12-05 02:41 -0800
  Re: Collection to implement linked structure traverse up and down Martin Gregorie <martin@address-in-sig.invalid> - 2011-11-30 21:17 +0000

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