What is abstract
A Java keyword used in a class
definition to specify that a class is not to be instantiated,
but rather inherited by other classes. An abstract class can
have abstract methods that are not implemented in the abstract
class, but in subclasses.
What is abstract class
A class that contains one or more abstract methods, and
therefore can never be instantiated. Abstract classes are
defined so that other classes can extend them and make them
concrete by implementing the abstract methods.
What is abstract method
A method that has no implementation.
What is Abstract Window Toolkit (AWT)
A collection of graphical user interface (GUI) components
that were implemented using native-platform versions of the
components. These components provide that subset of
functionality which is common to all native platforms. Largely
supplanted by the Project Swing component set. See also Swing.
What is access control
The methods by which interactions with resources are limited
to collections of users or programs for the purpose of enforcing
integrity, confidentiality, or availability constraints.
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