Path: csiph.com!eternal-september.org!feeder.eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
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
Organization: Decebal Computing
Lines: 37
Message-ID: <87bljy6qu3.fsf@munus.decebal.nl>
References: <87k0ym73id.fsf@munus.decebal.nl> <rfscpe$doa$1@dont-email.me> <87ft9a6u35.fsf@munus.decebal.nl> <rfsgek$jm4$1@gioia.aioe.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Injection-Info: reader02.eternal-september.org; posting-host="79ff8c6ea305f6a25ce9fe89b8d0bb76"; logging-data="32137"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1+xxPPje8ZNUC8abSzV+FZeSQb8gUahGVM="
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux)
Cancel-Lock: sha1:8YgA6oncHEklz656AVPrk95w5gg= sha1:A0RgVuJhV6B6dinixIF/JnDlhAk=
Xref: csiph.com comp.lang.java.programmer:39596

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