One of the main advantages of Abstract Factory Pattern is that it isolates the concrete classes. Main focus of this patter is to depands on abstructtion rather then concreate one
An abstract factory pattern is a creational design pattern which decouples the object creation by providing a group of individual factories by defining an abstract factory class.
All interfaces are abstract.
D. S. Malik has written: 'Java Programming' 'Java programming' -- subject(s): Java (Computer program language) 'Fundamentals of abstract algebra' -- subject(s): Abstract Algebra, Algebra, Abstract 'C++ Programming'
yes
include all abstract method
when overriding of a class or a method is necessary, they can be declared as abstract
An interface in Java is like an abstract class, but there are no method bodies allowed in it and it has to be declared with the interface keyword. It is Java's way of getting around the Deadly Diamond of Death. Only abstract methods and constants are allowed in it.
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All built-in data types are not abstract data types.
Interface is collection of abstract methods which has only declaration and no implementation
Constants and abstract methods. That's it.
Abstraction in Java is achieved using interfaces and abstract class. abstract means something which is not complete or concrete but abstraction itself is a great programming concept and allow you to write code which is more flexible to change.