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Groups > comp.lang.java.programmer > #33553
| From | Knute Johnson <nospam@rabbitbrush.frazmtn.com> |
|---|---|
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: Assignment or Initialization? |
| Date | 2016-02-01 12:31 -0800 |
| Organization | A noiseless patient Spider |
| Message-ID | <n8of62$ku9$1@dont-email.me> (permalink) |
| References | <assignment-20160201130855@ram.dialup.fu-berlin.de> <n8oa1b$tq9$2@dont-email.me> <n8ockg$b4a$1@dont-email.me> |
On 2/1/2016 11:47, Eric Sosman wrote:
> On 2/1/2016 2:03 PM, 4ndre4 wrote:
>> On 01/02/2016 12:23, Stefan Ram wrote:
>>
>> [...]
>>> final int i;
>>> i = 3;
>>
>> This is illegal.
>>
>> final int i = 3;
>>
>> is the correct form: initialization. You can't declare a final variable
>> and THEN assign a value to it, unless you are in a constructor, in which
>> case it's still an initialization.
>
> What you say is true (I think) if `i' is a class member.
> But it's untrue for local variables, where constructs like
>
> final boolean leftClick;
> switch (mouseEvent.getButton()) {
> case MouseEvent.BUTTON1:
> leftClick = true;
> break;
> case MouseEvent.BUTTON3:
> leftClick = false;
> break;
> default:
> // Unidentifiable mouse button: Ignore.
> return;
> }
>
> ... work exactly as one would expect: `leftClick' is given only
> one value and is thereafter immutable, but the value comes from one
> of two (in this case) assignment statements.
>
> Whether this is counts as an "assignment" or as an "initialization"
> is not something I lose sleep over.
>
public class test {
final int i;
public test() {
i = 666;
}
}
is perfectly legal and used all the time (by me anyway).
--
Knute Johnson
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Re: Assignment or Initialization? 4ndre4 <4ndre4@4ndre4.com.invalid> - 2016-02-01 19:03 +0000
Re: Assignment or Initialization? Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-02-01 14:47 -0500
Re: Assignment or Initialization? Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-02-01 12:31 -0800
Re: Assignment or Initialization? Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-02-01 16:03 -0500
Re: Assignment or Initialization? Jerry Stuckle <jstucklex@attglobal.net> - 2016-02-01 19:52 -0500
Re: Assignment or Initialization? Arne Vajhøj <arne@vajhoej.dk> - 2016-02-01 20:46 -0500
Re: Assignment or Initialization? Wayne <nospam@all.invalid> - 2016-02-01 23:39 -0500
Re: Assignment or Initialization? Jerry Stuckle <jstucklex@attglobal.net> - 2016-02-02 09:14 -0500
Re: Assignment or Initialization? 4ndre4 <4ndre4@4ndre4.com.invalid> - 2016-02-02 19:25 +0000
Re: Assignment or Initialization? Eric Douglas <e.d.programmer@gmail.com> - 2016-02-01 13:13 -0800
Re: Assignment or Initialization? 4ndre4 <4ndre4@4ndre4.com.invalid> - 2016-02-02 19:26 +0000
Re: Assignment or Initialization? Arne Vajhøj <arne@vajhoej.dk> - 2016-02-01 20:55 -0500
Re: Assignment or Initialization? 4ndre4 <4ndre4@4ndre4.com.invalid> - 2016-02-02 19:29 +0000
Re: Assignment or Initialization? Eric Douglas <e.d.programmer@gmail.com> - 2016-02-02 11:44 -0800
Re: Assignment or Initialization? Lew <lewbloch@gmail.com> - 2016-02-02 13:16 -0800
Re: Assignment or Initialization? Lew <lewbloch@gmail.com> - 2016-02-02 13:15 -0800
Re: Assignment or Initialization? Arne Vajhøj <arne@vajhoej.dk> - 2016-02-02 18:13 -0500
Re: Assignment or Initialization? Silvio <silvio@internet.com> - 2016-02-03 12:10 +0100
Re: Assignment or Initialization? Eric Douglas <e.d.programmer@gmail.com> - 2016-02-03 05:14 -0800
Re: Assignment or Initialization? Lew <lewbloch@gmail.com> - 2016-02-03 13:39 -0800
Re: Assignment or Initialization? Lew <lewbloch@gmail.com> - 2016-02-02 10:32 -0800
Re: Assignment or Initialization? 4ndre4 <4ndre4@4ndre4.com.invalid> - 2016-02-02 19:22 +0000
Re: Assignment or Initialization? Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2016-02-03 09:03 -0800
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