Matching the data

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Hello All,

1) My Question is if there are 1,00,000 files in the Arraylist, List, Vector how will I efficiently pick out the name I want.

How can I do it?

2) This one is same as the above question but the data is stored in the text file and I have to match the required single person name or email from the huge data stored in the file(emails or person name).

will you explain it with some more detailed please

Posted 10-Aug-10 21:28pm

krishnareddy036

Updated 22-Sep-10 23:35pm

v5

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Dalek Dave 11-Aug-10 4:06am

Edited for Readabiliity and Grammar.

2 solutions

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Richard MacCutchan · Answer 1 · 2010-08-10T22:00:00

Solution 1

For question 1 you should probably use one of the Collection Classes[^] or your own class based on one of these.

For question 2 some form of database is most likely the best option.

Posted 10-Aug-10 22:00pm

Richard MacCutchan

CPallini · Answer 2 · 2010-08-10T22:08:00

Solution 2

(1) I suppose an HashMap would do the trick.
(2) It strongly depends on the file structure.
:)

[added]

HashMap is based on hash table, that is fairly efficient. See http://en.wikipedia.org/wiki/Hashtable for some info.
[/added]

Posted 10-Aug-10 22:08pm

CPallini

Updated 23-Aug-10 21:09pm

v2

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krishnareddy036 23-Aug-10 8:30am

how can HasMap Solve the problem is their any method are way to search as fast as it can