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Re: Compare generics (that are numbers)

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On 7/29/2020 3:53 PM, Cecil Westerhof wrote:
> Arne Vajhøj <arne@vajhoej.dk> writes:
>> On 7/29/2020 2:42 PM, Cecil Westerhof wrote:
>>> Eric Sosman <esosman@comcast-dot-net.invalid> writes:
>>>> On 7/29/2020 11:19 AM, Cecil Westerhof wrote:
>>>>> I have a class that starts with:
>>>>>        abstract class CalcValuesGeneric<E> {
>>>>>
>>>>> E will be Integer, int, Float or float. (For now, but always a Number.)
>>>>> What is the best way to determine which of the two is lower?
>>>>
>>>>       Aside: How can you get `<E>' to be `<int>' or `<float>'?  Is that
>>>> something new?  I'm still on Java 8, but the JLS for 14 says "Seq<int>
>>>> is illegal, as primitive types cannot be type arguments." (4.5)
>>>
>>> You are completely right, I was not thinking straight. :'-(
>>
>> Probably a common miswording.
>>
>> class CalcValuesGeneric<E> {
>>      void something(E v)
>> ...
>> cvg.something(x);
>>
>> E can be Integer or Float but not int or float.
>>
>> But x can be int and float as well due to auto boxing.
> 
> But I do not want auto boxing. The particular case I am working with
> shows that int can take 40% less CPU and memory when using Integer.
> 
> I will find another way. Thanks.

Well - code that handle objects does require objects.

:-)

But if this is performance critical then why not just drop the
generic stuff and write specific code for the types?

Arne

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Compare generics (that are numbers) Cecil Westerhof <Cecil@decebal.nl> - 2020-07-29 17:19 +0200
  Re: Compare generics (that are numbers) Arne Vajhøj <arne@vajhoej.dk> - 2020-07-29 13:21 -0400
    Re: Compare generics (that are numbers) Arne Vajhøj <arne@vajhoej.dk> - 2020-07-29 13:27 -0400
  Re: Compare generics (that are numbers) Eric Sosman <esosman@comcast-dot-net.invalid> - 2020-07-29 13:48 -0400
    Re: Compare generics (that are numbers) Cecil Westerhof <Cecil@decebal.nl> - 2020-07-29 20:42 +0200
      Re: Compare generics (that are numbers) Arne Vajhøj <arne@vajhoej.dk> - 2020-07-29 14:50 -0400
        Re: Compare generics (that are numbers) Cecil Westerhof <Cecil@decebal.nl> - 2020-07-29 21:53 +0200
          Re: Compare generics (that are numbers) Arne Vajhøj <arne@vajhoej.dk> - 2020-07-29 21:32 -0400
            Re: Compare generics (that are numbers) Cecil Westerhof <Cecil@decebal.nl> - 2020-07-30 11:33 +0200
              Re: Compare generics (that are numbers) Eric Sosman <esosman@comcast-dot-net.invalid> - 2020-07-30 09:03 -0400
                Re: Compare generics (that are numbers) Cecil Westerhof <Cecil@decebal.nl> - 2020-07-30 17:00 +0200
              Re: Compare generics (that are numbers) Arne Vajhøj <arne@vajhoej.dk> - 2020-07-30 09:21 -0400
          Re: Compare generics (that are numbers) Silvio <silvio@internet.com> - 2020-07-30 08:51 +0200
            Re: Compare generics (that are numbers) Cecil Westerhof <Cecil@decebal.nl> - 2020-07-30 11:36 +0200
  Re: Compare generics (that are numbers) Marcel Mueller <news.5.maazl@spamgourmet.org> - 2020-07-29 20:59 +0200

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