StreamSupport collector and java 7

I'm trying to use StreamSupport in order to explore stream on Java 7. I've added streamsupport-1.5.4.jar to my project and written a code like this:

import java8.util.stream.Collectors;

public class FinantialStatement {

    private List<Rubric> values;

    public List<Rubric> getConsolidatedRubrics() {
        List<Rubric> rubrics = values.stream().sorted((Rubric r1, Rubric r2) -> r1.getOrder().compareTo(r2.getOrder())).collect(Collectors.toCollection(ArrayList::new));
        return rubrics;
    }
}

I'm receiving the following error:

Type mismatch: cannot convert from Collector<Object,capture#1-of
?,Collection<Object>> to Collector<? super Rubric,A,R>

I've tried to apply the hint proposed by Eclipse

Add cast to '(Collector<? super Rubric, A, R>)'

but it has not solved the problem.

Does someone have any idea? Thanks.