Groups > comp.lang.java.programmer > #39596

Re: Compare generics (that are numbers)

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From	Cecil Westerhof <Cecil@decebal.nl>
Newsgroups	comp.lang.java.programmer
Subject	Re: Compare generics (that are numbers)
Date	Wed, 29 Jul 2020 21:53:08 +0200
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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.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

Thread

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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