Why overloading is compile time polymorphism

The language treats methods with overloaded names as totally different methods and as such they can have different return types. However, since overloaded methods perform the same job with different data sets, they should produce same return type normally. There is one particular condition, however, under which it is sensible to define different return types.

This is the situation where the return type is derived from the argument type and is exactly parallel with the arithmetic operators. It's run-time because the flow of program can't be known before execution i. Python Javascript Linux Cheat sheet Contact.

Overloading is compile-time polymorphism. Overloaded methods can still be overridden, if that is what you ask. That is, method dispatching is performed in two steps: The first one is done at compile time with the static information available, the compiler will emit a call for the signature that matches best your current method parameters among the list of overloaded methods in the declared type of the object the method is invoked upon.

The second step is performed at run time, given the method signature that should be called previous step, remember? No, we cannot override the static method as the concept of Method Overriding is based on Dynamic Binding at runtime whereas static methods are bonded at compile time using static binding.

Therefore, though we can specify static methods in the subclass with the same signature, this is not considered overriding because there would be no run-time polymorphism. A child class cannot override a final method declared in the Parent class. This is because the compiler will throw an error if we try to override the final method at compilation time.

Hence, the methods that are declared as final cannot be Overridden or hidden. A static method is linked to a class in Java, whereas a non-static method is linked to an object. As a result, overriding the main method in Java is not feasible. Polymorphism is one of the most critical aspects of Object-Oriented Programming. By coming to the end of this article, we understood the two forms of polymorphism: compile-time and run-time polymorphism in java.

Both compile-time and run-time polymorphism differ in their approach to method binding and method invocation. About Us. Privacy Policy. Bug Bounty. Press Release. Career Camp. Captain Coder. Hire Talent. Campus Ninja. Table of Contents. What are compile-time and run-time polymorphism examples?

It means if child class provides the specific implementation of the method that has been provided by one of its parent class then it is known as method overriding. The following is an example where runtime polymorphism can be observed. In Run time Polymorphism, the call is not resolved by the compiler. It is also known as Dynamic binding, Late binding and overriding as well. Method overriding is the runtime polymorphism having same method with same parameters or signature, but associated in different classes.

It is achieved by virtual functions and pointers. It provides slow execution as compare to early binding because the method that needs to be executed is known at the runtime. Run time polymorphism is more flexible as all things execute at run time. Skip to content. Change Language.