'Set = new HashSet' or 'HashSet = new Hashset'?
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Published on 2012-10-03T09:36:25Z
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I'm intialising a HashSet
like so in my program:
Set<String> namesFilter = new HashSet<String>();
Is this functionally any different if I initilise like so?
HashSet<String> namesFilter = new HashSet<String>();
I've read this about the collections interface, and I understand interfaces (well, except their use here). I've read this excerpt from Effective Java, and I've read this SO question, but I feel none the wiser.
Is there a best practice in Java, and if so, why? My intuition is that it makes casting to a different type of Set
easier in my first example. But then again, you'd only be casting to something that was a collection, and you could convert it by re-constructing it.
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