What technology to use to store a huge list of name-value pairs?

Hi:
I have a list of name value pairs (the size of the list is ~500). I get the name from the request parameter, and depending on the value for that, I have to display images on my webpage.
How should I go about this? Should I use a Hashtable to store the values or should I use an array or should I got for XML and some pattern matching or should I write to a text file and do some pattern matching?
Please help.
Thanks

Did you mean huge (several million) or is 500 more like the number? For "huge" you use a database. For 500, if you want to access the value when you are given the name, you use a Map. Probably a HashMap would be best.

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