collect signature

[Boaz Nahum]

Hi Brian.

I guess you already have been asked this trillion times, but,
why <I> appears in collect signature ?

*<R, I> R collect(Collector<? super T, I, R> collector);*

I tried to compile many examples(from Collectors) with:

*<R> R collect(Collector<? super T, ?, R> collector);*

and it just compiled fine.

Thanks
Boaz



On Fri, Jun 14, 2013 at 2:20 AM, <brian.goetz at oracle.com> wrote:

> Changeset: de85a85ab586
> Author:    briangoetz
> Date:      2013-06-13 19:20 -0400
> URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/de85a85ab586
>
> Add post-transform functionality to Collector; eliminate STRICTLY_MUTATIVE
> collector characteristic; restructure existing set of Collectors, including
> various renamings; add StringJoiner.merge() method; more Collector tests
>
> ! src/share/classes/java/util/DoubleSummaryStatistics.java
> ! src/share/classes/java/util/IntSummaryStatistics.java
> ! src/share/classes/java/util/LongSummaryStatistics.java
> ! src/share/classes/java/util/Optional.java
> ! src/share/classes/java/util/StringJoiner.java
> ! src/share/classes/java/util/stream/Collector.java
> ! src/share/classes/java/util/stream/Collectors.java
> ! src/share/classes/java/util/stream/DelegatingStream.java
> ! src/share/classes/java/util/stream/ReduceOps.java
> ! src/share/classes/java/util/stream/ReferencePipeline.java
> ! src/share/classes/java/util/stream/Stream.java
> ! test/java/lang/StringBuilder/AddAllTest.java
> ! test/java/util/StringJoiner/BasicTest.java
> ! test/java/util/stream/bootlib/java/util/stream/OpTestCase.java
> !
> test/java/util/stream/test/org/openjdk/tests/java/util/FillableStringTest.java
> !
> test/java/util/stream/test/org/openjdk/tests/java/util/stream/GroupByOpTest.java
> !
> test/java/util/stream/test/org/openjdk/tests/java/util/stream/SummaryStatisticsTest.java
> !
> test/java/util/stream/test/org/openjdk/tests/java/util/stream/TabulatorsTest.java
> ! test/jdk/lambda/MethodReferenceTestInstanceMethod.java
> ! test/jdk/lambda/separate/TestHarness.java
>
>
>