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Exception Handling

Exceptions are a mechanism used by many programming languages to describe what to do when something unexpected happens.  Typically, something unexpected is an error of some sort, for example when a method is invoked with unacceptable arguments, or a network…

Packages and Interfaces

Packages package <top_pkg_name>[.<sub_pkg_name>];  Packages and Member Access Understanding Protected Members private default protected private same class Y Y Y Y subclass same package N Y Y Y non-subclass same package N Y Y Y subclass different package N N Y…

Inheritance

Inheritance Basics Member Access and Inheritance Although a subclass includes all of the members of its superclass, it cannot access those members of the superclass that have been declared as private.  This program will not compile because the use of j inside…