explanation to abstract classes in java

1. Abstract Classes
● An abstract class is a class that is declared
abstract.
● It may or may not include abstract methods.
● Abstract classes cannot be instantiated, but
they can be subclassed.
Syntax:
abstract class <class-name>{}

2. Types of abstraction
● Data abstraction
Abstracting the data members in the abstract
class
● Control abstraction
Abstracting the functions that performs the
operation.

3. Sample code for abstract classes

4. Sample output