Abstract classes
An Abstract class is used when the developer wishes to ensure that a particular
class cannot be instantiated. This applies when sub-classes will be created
which contain the real functionality, and it is meaningless to create an
instance of the parent class.
A
class is declared as abstract in the Class Declaration.
abstract class AJ_Abstract
{
int x;//X is integer
}
As
can be seen in the example, it is possible to put variable declarations inside
an abstract class. It is also possible to add both abstract and concrete (non-abstract) methods on that class.
It
is not possible to instantiate an object of this class.
abstractObject
= new
AJ_Abstract()
Ex:- RunBase class ,RunBaseBatch class
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