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Arrays.toArray : All my knowledge collapses ...

Cyril Bil

Joined: Oct 10, 2011
Posts: 9
Hi guys I just try this sample question :

I was sure at 110% that code compile and run without exception and .....

I go to the API doc and see

asList(T... a) : Returns a fixed-size list backed by the specified array.

ARghhhhhhhhhhh I thinhed that the first specifities of collection vs arrays was that collections has no fixed size ... :/

So my question : is there another method to fixed size for collection, and if there is another method is it only for List, ot also for set, map etc ...


Stephan van Hulst

Joined: Sep 20, 2010
Posts: 3791

In the standard API? I'm not sure. You probably shouldn't care either. Just read the method documentation carefully when you use a method.
Harsha Smith
Ranch Hand

Joined: Jul 18, 2011
Posts: 287
Yes, Arrays.asList(T...a) produces a list backed by the array. The size is fixed and also its very slow.

sakthi moorthy
Ranch Hand

Joined: Oct 17, 2007
Posts: 54
If you want to add or remove elements from List which was returned from Arrays.asList(dogs); method
change your code like following

Thanks & Regards
I agree. Here's the link:
subject: Arrays.toArray : All my knowledge collapses ...