Linked Lists define a list node define a singly-linked list with head node and counter be able to traverse the list from beginning to end and, for example, find a given node, print the data in a given node. append a new node to the end of the list. insert a new node after a given node in the list Interfaces understand the difference between a Class and an Interface understand that classes are extended and interfaces are implemented Inheritance understand what methods and data items are inherited from a super class when they are declared public, private and protected. understand the use of super() , the default use of super() and how to work with multiple super() methods (with different signatures). understand the use of the this reference to use different constructors in the same class. understand the use of overridden methods (polymorphism) in a class hierarchy (for example, for a given object, which toString method will be called. Abstract Classes and Methods understand what the implications are when a class or methods in a class are declared abstract (that is, an abstract class cannot be instantiated and must be extended to the point that no methods remain abstract.) Event-Driven Programming Creation of a GUI (JFrame) with JMenuBar, JMenu, and JMenuItem. Registration of JMenu items with an even handler (ActionListener) Creation of an ActionListener with an appropriate actionPerformed method. Determine which menu item generated the event