What is the benefit of declaring a 'static interface class (package level visibilit' inside a class?

[ying lam]

Can you please tell me what is the benefit of benefit of declaring a 'static interface class' inside a class?

I can declare a package visible interface class , right? What is the advantage of doing a 'static interface class'?

[Rob Spoor]

There isn't really, except that you indicate that the interface has some connection to the outer class / interface. Map.Entry for instance only makes sense when using Maps.