Lambda behaving differently than anonymous inner class

[Zhong Yu]

At least, *implicit* lambda parameters should be final. But it's too late now.

On Wed, Mar 26, 2014 at 12:50 PM, Sam Pullara <spullara at gmail.com> wrote:
> I think there was some discussion about whether the lambda parameters should be final. I still think they should have been.  Sam
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> ---Sent from Boxer | http://getboxer.com
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> On 03/26/2014 05:56 PM, Dan Smith wrote:
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>> Thanks for the report.  The bug is filed here:
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>>
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>> https://bugs.openjdk.java.net/browse/JDK-8038420
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>>
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>> --Dan
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>
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> Yes, definitively a bug !
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>
>
> Victor, modify a parameter inside a lambda is something weird|.||
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>    Supplier<Integer>s2 =t ->t++;|
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> means
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> |  Supplier<Integer>s2 =t ->{
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> t = t + 1;
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>      return t;
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>    };
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> |so this is equivalent to|
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>    Supplier<Integer>s2 =t ->t+ 1;|
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>
>
> cheers,
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> Rémi
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>
>
>>
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>> On Mar 26, 2014, at 9:03 AM, Victor Antunes <victor.antunes.ignacio at gmail.com> wrote:
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>>
>
>>> Hello all,
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>>>
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>>> This e-mail is a follow-up to a question I've posted on StackOverflow:
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>>> http://stackoverflow.com/questions/22648079/lambda-behaving-differently-than-anonymous-inner-class
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>>>
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>>>
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>>> I'm relatively new to Java, and decided to pick up on lambda since the past
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>>> few days. So I wrote a very simple anonymous inner class and wrote an
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>>> equivalent lambda.
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>>>
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>>> However, the lambda output was different, and it very strongly appears to
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>>> be a bug.
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>>>
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>>> Given:
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>>>
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>>> interface Supplier<T> {
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>>>
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>>>     T get(T t);}
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>>>
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>>> Supplier<Integer> s1 = new Supplier<Integer>() {
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>>>     @Override
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>>>     public Integer get(Integer t) {
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>>>         return t++;
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>>>     }};Supplier<Integer> s2 = t ->
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>>> t++;System.out.println(s1.get(2));System.out.println(s2.get(2));
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>>>
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>>> The output is 2 and 3, NOT 2 and 2, as one would expect.
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>>>
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>>> More info, including discussion about bytecode is available at the SO link
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>>> above.
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>>>
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>>> I'm also new to this list, so apologies if I've broken any mailing list
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>>> etiquette.
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>>>
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>>> --
>>> Kind regards,
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>>>
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>>> Victor Antunes
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>>>
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>>
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