Cannot infer type argument(s) for <R> map(Function<? super T,? extends R>)

[dangyuqiang]

Description Resource Path Location Type
Cannot infer type argument(s) for map(Function<? super T,? extends R>) StorageOrderServiceImpl.java /okhelper/src/main/java/com/ok/okhelper/service/impl line 82 Java Problem

[dangyuqiang]

项目使用的sdk版本是多少

[coderzc]

JDK8