In order to override a method, a subclass of the class which originally declared the method have to declare a method along with the same name, return type (or a subclass of that return type), & same parameter list.

The definition of the method overriding is following:

• Must have same data type.
• Must have same method name.
• Must have same argument list.

Overriding a method refer that replacing a method functionality in child class. In order to imply overriding functionality we require parent & child classes. In the child class you described the same method signature as defined in the parent class.