Why `private static` field is not allowed in Java 8 interface?

Question

When I\'m trying to compile the following code

public interface SomeInterface{
    private static Logger logger = Logger.getLogger();

    public default voi         


        

Answer 1

Interfaces are not classes. They have no private state. Even a public logger in the interface is a design smell and an abuse of interfaces.

The use case for static fields in interfaces is mainly for compile-time constants, not for stateful objects.