Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs. Abstract classes and ...

The abstract keyword is a non-access modifier, used for classes and methods: Abstract class: is a restricted class that cannot be used to create objects (to access it, it must be inherited from ...

As per the dictionary, abstract means not concrete. In object oriented languages also, when a class is marked with abstract keyword, it indicates that the class is not concrete. It cannot be ...