What will prompt one to use this method?
Update : I see the point now. I like the reason of Uri “Shuffling is not a trivial algorithm”. That is quite true.
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What will prompt one to use this method?
Update : I see the point now. I like the reason of Uri “Shuffling is not a trivial algorithm”. That is quite true.
There can be many reasons one would want to randomly shuffle an ordered sequence of elements. For instance, a deck of cards.
Shuffling is not a trivial algorithm, just as sorting isn’t – So it is common enough to necessitate a library function.
As to why a list – obviously it has to be an ordered collection, thus not any general Collection. Only list and its subtypes are guaranteed to be ordered. The Collections class does not provide operations for arrays, but you could (and probably should, for performance) pass an ArrayList to this method.