CS202 Java-94
Abstract
Base Classes
lIf a class has just one of these abstract methods, the class must be qualified as “abstract”, otherwise you get
an error:
abstract class list{
public abstract void
display();
}
lTo inherit from an abstract class (and you want objects
to exist of your class),
•you must implement
all of the functions that are abstract in the base class
lAn abstract class
without any abstract methods
•means that you just can’t create any objects of that
class!