No, we can’t create an object of an abstract class. … The reference variable is used to refer to the objects of derived classes (subclasses of abstract class). An abstract class means hiding the implementation and showing the function definition to the user is known as Abstract class.

Can you have an abstract variable?

You cannot declare an abstract variable in Java. If you wish to declare a variable in a super-class, which must be set by its sub-classes, you can define an abstract method to set that value…

Can you have abstract methods?

You can’t have an abstract method in a concrete class. If you want an abstract method, the class must also be abstract. Otherwise users could instantiate the class and try to implement its methods. However, if your class is abstract, it may have some methods that are abstract and others that are concrete.