Compilation error with JDK8 and Guava

[Olivier Bourgain]

I downloaded the b83 lambda build (build
1.8.0-ea-lambda-nightly-h3797-20130325-b83-b00) and I confirm the bug is
fixed.

Thanks a lot.

Olivier


2013/4/2 Sven Reimers <sven.reimers at gmail.com>

> Hi Rémi,
>
> do you think of the b83 lambda build? The early access at
> http://jdk8.java.net/download.html still shows b82..
>
> Thanks
>
> Sven
>
>
> On Tue, Apr 2, 2013 at 11:45 AM, Remi Forax <forax at univ-mlv.fr> wrote:
>
> > On 04/02/2013 08:50 AM, Olivier Bourgain wrote:
> > > Hi all,
> > >
> > > I tried to compile my project at work with the JDK 8 and I get a
> > > compilation error.
> > >
> > > The simplest example which I was able to extract is the following. It
> > uses
> > > Guava 1.14.0.1.
> >
> > Hi Olivier,
> > could you test with b83 because it looks like a bug that was fixed
> > recently.
> >
> > cheers,
> > Rémi
> >
> > >
> > > import java.util.LinkedHashMap;
> > > import java.util.List;
> > > import java.util.Map;
> > > import com.google.common.collect.Lists;
> > >
> > > public class TestCase {
> > >
> > >     public static <K, V> Map<K, V> reverseMap(List<Map.Entry<K, V>>
> > list) {
> > >        return toMap(Lists.reverse(list));
> > >     }
> > >
> > >     public static <K, V> Map<K, V> toMap(List<Map.Entry<K, V>> list) {
> > >        Map<K, V> result = new LinkedHashMap<>();
> > >        for (Map.Entry<K, V> entry : list)
> > >           result.put(entry.getKey(), entry.getValue());
> > >        return result;
> > >     }
> > > }
> > >
> > > The compilation error is :
> > >
> > > » javac -cp lib/guava-14.0.1.jar src/TestCase.java
> > > src/TestCase.java:9: error: method toMap in class TestCase cannot be
> > > applied to given types;
> > >        return toMap(Lists.reverse(list));
> > >               ^
> > >    required: List<Entry<K#1,V#1>>
> > >    found: List<Entry<K#2,V#2>>
> > >    reason: inferred type does not conform to equality constraint(s)
> > >      inferred: Entry<Object,Object>
> > >      equality constraints(s): Entry<Object,Object>,Entry<K#2,V#2>
> > >    where K#1,V#1,K#2,V#2 are type-variables:
> > >      K#1 extends Object declared in method
> > > <K#1,V#1>toMap(List<Entry<K#1,V#1>>)
> > >      V#1 extends Object declared in method
> > > <K#1,V#1>toMap(List<Entry<K#1,V#1>>)
> > >      K#2 extends Object declared in method
> > > <K#2,V#2>reverseMap(List<Entry<K#2,V#2>>)
> > >      V#2 extends Object declared in method
> > > <K#2,V#2>reverseMap(List<Entry<K#2,V#2>>)
> > > 1 error
> > >
> > >
> > > The java version is :
> > >
> > > java version "1.8.0-ea"
> > > Java(TM) SE Runtime Environment (build 1.8.0-ea-b82)
> > > Java HotSpot(TM) Server VM (build 25.0-b23, mixed mode)
> > >
> > > The same code compiles without error with Java 1.7.
> > >
> > >
> > > Olivier Bourgain
> > >
> >
> >
> >
>
>
> --
> Sven Reimers
>
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