[1.14] IntelliJ What am I missing?

[American2050]

I remember seen this error in the past, but in other projects I have set up, the errors are no longer present, and I don't know what I'm missing or what fixed it.

 

 

 

Why is all this showing underlined in red?

 

I understand it's because

import java.util.stream.Collectors;

can't be resolved. But I don't understand how to fix it.

 

[American2050]

Thanks. Yes I think the problem was that IntelliJ was trying to use Java 11 instead of 8.