It is not possible to have an instance of a non-static inner class before any instances of the outer class have been created.

Keep practicing — related questions

• Can inner classes have static members?
• Can inner class have static members?
• Static members can be called without having an instance.
• Static nested classes do not have access to
• This is a legal way to create an instance of an inner class: OuterClass.InnerClass x=new OuterClass().Inner...
• Local inner classes cannot access the local data members of the method in which they are defined.
• static methods cannot be overridden to non-static methods.
• In Static inner classes, the data members and the member functions are by default static.