Abstract class: When inheriting an abstract class

When inheriting an abstract class , a concrete child class must define the abstract methods, whereas an abstract class can extend another abstract class and abstract methods from the parent class don't have to be defined. In Java, abstract class is declared with the abstract keyword. It may have both abstract and non-abstract methods (methods with bodies). An abstract is a Java modifier applicable for classes and methods in Java but not for Variables. In this article, we will learn the use of abstract classes in Java. What is Abstract Class in Java? Java abstract class is a class that can not be instantiated by itself, it needs to be subclassed by another class to use its properties. An abstract class is ... Learn how to use abstract classes and interfaces to achieve abstraction in Java programming. See examples of abstract classes, abstract methods, and inheritance of abstract classes. Learn how to use abstract classes and methods in Java to share code among related classes or specify behavior of data types. See examples, comparisons with interfaces, and a drawing application.