Yes, we can declare an abstract class with no abstract methods in Java. An abstract class means that hiding the implementation and showing the function definition to the user. An abstract class having both abstract methods and non-abstract methods. For an abstract class, we are not able to create an object directly.
Can abstract class be final?
No, An abstract class can’t be final because the final and abstract are opposite terms in JAVA. Reason: An abstract class must be inherited by any derived class because a derived class is responsible to provide the implementation of abstract methods of an abstract class. But on another hand, if a class is a final class, then it can’t be extended (inherited).
What is a public abstract class?
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. ... and define public, protected, and private concrete methods. With interfaces, all fields are automatically public, static, and final, and all methods that you declare or ...
What is the difference between abstract and interface?
- Abstract Class. Abstract class is a special type of class which cannot be instantiated and acts as a base class for other classes.
- Interface. An interface defines a contract. An interface is not a class; it is an entity that is defined by the word Interface.
- Difference between Abstract Class & Interface. A class can inherit several interfaces. ...
What is abstract class?
An abstract class is a template definition of methods and variables of a class (category of objects) that contains one or more abstracted methods. Declaring a class as abstract means that it cannot be directly instantiated, which means that an object cannot be created from it.
