Why overriding is needed

Overloading vs. The two examples below illustrate their differences:. The table below highlights their key differences:. Must have at least two methods by the same name in the class. Must have a different number of parameters. If the number of parameters is the same, then it must have different types of parameters.

Overloading is known as compile-time polymorphism. Must have at least one method by the same name in both parent and child classes. Must have the same number of parameters.

Computer Graphics. Software Engineering. Web Technology. Cyber Security. C Programming. Control System. Data Mining. Data Warehouse. Javatpoint Services JavaTpoint offers too many high quality services. Usage of Java Method Overriding Method overriding is used to provide the specific implementation of a method which is already provided by its superclass.

Method overriding is used for runtime polymorphism Rules for Java Method Overriding The method must have the same name as in the parent class The method must have the same parameter as in the parent class. There must be an IS-A relationship inheritance. Understanding the problem without method overriding Let's understand the problem that we may face in the program if we don't use method overriding.

Example of method overriding In this example, we have defined the run method in the subclass as defined in the parent class but it has some specific implementation.

Java method overriding is mostly used in Runtime Polymorphism which we will learn in next pages. The variations will turn into abstract classes that extend your base class. You can use it where you want to use the same "method name" and "signature" but need to give new code functionality. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

Collectives on Stack Overflow. Learn more. Why method overriding is required? Asked 3 years, 11 months ago. Active 3 years, 11 months ago. Improve Article. Like Article. DerivedClass dr;. Display ;. Show ;. Recommended Articles. Why overriding both the global new operator and the class-specific operator is not ambiguous? Article Contributed By :.