Describe the differences between abstract classes and interfaces in Java.

1 Answers
Answered by suresh

Differences between abstract classes and interfaces in Java

Abstract classes and interfaces are two important concepts in Java that allow for abstraction and code reusability. Let's explore the differences between them:

Abstract Classes

  • Focus Keyword: abstract classes
  • Abstract classes can have both abstract and concrete methods.
  • They can have instance variables.
  • Abstract classes can include constructors.
  • A class can extend only one abstract class.

Interfaces

  • Focus Keyword: interfaces
  • Interfaces can only have abstract methods (methods without a body).
  • They cannot have instance variables.
  • Interfaces cannot include constructors.
  • A class can implement multiple interfaces.

In summary, abstract classes offer a combination of abstract and concrete methods along with variables, while interfaces provide a way to define a contract for classes to implement specific methods. Understanding the differences between them is crucial in designing efficient and maintainable Java code.

Answer for Question: Describe the differences between abstract classes and interfaces in Java.