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How to maintain Parent-Child Data

 
Ranch Hand
Posts: 54
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Hi, I want to read data from some table and maintain it in a data structure.
Table o/p is like:

Id Parent Id
-- ---------
1 0
2 0
3 2
4 3
5 2
6 0
7 6
8 6
Here parent id 0 means that node is a parent node.
I want to know the way that I can use to maintain this data in a data structure(HashMap,ArrayList etc.) so that I can read it in my jsp.
As an example data structure should say: for Id number 6 -> 7 and 8 are the children.

thanks.
 
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What have you tried and where are you stuck?
 
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