Which Java class programming technique shows the use of polymorphism?

Polymorphism means “many forms “, and it occurs when we have many classes that are related to each other by inheritance. Like we specified in the previous chapter; Inheritance lets us inherit attributes and methods from another class. Polymorphism uses those methods to perform different tasks.

Now we use an abstract method and polymorphism to perform payroll calculations based on the type of employee . We create an enhanced employee hierarchy to solve the following problem: A company pays its employees on a weekly basis.

Since both the definition are different in those classes, calc_grade() will work in different way for same input from different objects. Hence it shows polymorphism.