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Re: Cannot create a generic array of <type>

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On 10/20/2011 3:21 AM, markspace wrote:
> On 10/19/2011 9:43 AM, Warren Tang wrote:
>> On 10/19/2011 7:50 PM, markspace wrote:
>>> On 10/19/2011 3:11 AM, Warren Tang wrote:
>>>> Thanks for the info. If I use the reified version of the generic - i.e.
>>>> the erased version of the generic - ArrayList instead of
>>>> ArrayList<Integer>, the compile error goes away and there is no
>>>> run-time
>>>> error either.
>>>>
>>>> ArrayList<Integer>[] indexedValues = new ArrayList[5];
>>>>
>>>> Although there is still a type safety warning.
>
>
> Because what you did is not type safe. It's also a terrible idea and
> poor practice. Bosses and co-workers will not like this sort of thing.
>
>
>> Sure. I just wanted to know why.
>
>
> What you have there is not the reified version of a generic. It's a raw
> type. It has no parameter type. It's a really bad idea to use raw types
> or to mix raw types and generics unless you must (there are a few
> specific instances where you can't avoid it). Here, you can almost
> certainly avoid raw types so do so.
>

Thanks for the suggestion. Though it's a local variable with controlled 
usage, I'd better follow the best practice and use ArrayList instead of 
arrays.

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Thread

Cannot create a generic array of <type> Warren Tang <nospam@tangcs.com> - 2011-10-19 12:06 +0800
  Re: Cannot create a generic array of <type> Warren Tang <nospam@tangcs.com> - 2011-10-19 13:22 +0800
  Re: Cannot create a generic array of <type> Lew <lewbloch@gmail.com> - 2011-10-18 23:28 -0700
    Re: Cannot create a generic array of <type> Warren Tang <nospam@tangcs.com> - 2011-10-19 18:11 +0800
      Re: Cannot create a generic array of <type> markspace <-@.> - 2011-10-19 04:50 -0700
        Re: Cannot create a generic array of <type> Warren Tang <nospam@tangcs.com> - 2011-10-20 00:43 +0800
          Re: Cannot create a generic array of <type> markspace <-@.> - 2011-10-19 12:21 -0700
            Re: Cannot create a generic array of <type> Warren Tang <nospam@tangcs.com> - 2011-10-21 11:05 +0800
      Re: Cannot create a generic array of <type> Lew <lewbloch@gmail.com> - 2011-10-19 10:00 -0700

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