如何将java流收集转换为scala

Question

Java code

objRefs = objRefs.stream().filter(objRef -> DataUtil.isNotEmpty(objRef)).collect(Collectors.toCollection(LinkedHashSet::new));

How to convert it to scala? Following code compile error

objRefs = objRefs.stream().filter(objRef => DataUtil.isNotEmpty(objRef)).collect(Collectors.toCollection(LinkedHashSet::new));

Answer 1

LinkedHashSet::new is not valid scala. Do you mean to call the constructor of LinkedHashSet? If so, use new LinkedHashSet(_)

The solution you've chosen is translating java to scala. If you do that, there is little value in using scala at all, and you might as well use java.

A more idiomatic solution would be

objRefs.stream().filter(DataUtil.isNotEmpty).asScala(Set)