Q: In the Java 2 training class I’m taking, the “In Packages and Inheritance” module states: When you create a subclass, it cannot inherit any of the superclass’s methods and variables ...

Here is a class diagram of the unit tests based on the expectations diagram: Conclusion. Java's access level modifiers work as advertised, but I hope I never encounter package-private modifiers in the ...

Similar to other object-oriented programming languages, Java supports defining interfaces on several levels. The accessibility of types, methods, and fields can be restricted by using access modifiers ...

Every element of a software architecture, e.g. a subsystem, package, or class, should have a well-defined interface that exposes or hides its sub elements according to the principles of information ...