Setting the load factor for a HashMap used to cache objects

I intend to use a HashMap to cache a small number of object and I am trying to initialize it such that it will execute lookups with minimal cost (time). I intend to initialize the HashMap with an initial capacity of 4, but I would appreciate any insight into the appropriate load factor to use to achieve the desired low-cost lookups. (As well, if anyone has suggestions as to a better method of caching a small number of objects, I would, again, be appreciative.)
Shaun

Your initial capacity is 4, so by a "small number of objects" you must mean "less than 10", I suppose. In this case pretty much any lookup will find the object almost immediately, including the O(n) sequential array search. So the only reason to care about the speed of this operation is if you are going to be doing it an extremely large number of times... is this the case?

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