Method Overriding | Run time Polymorphism | Dynamic Binding | Java | Selenium WebDriver
Method Overriding/Run time Polymorphism/Dynamic Binding
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A method in the SuperClass matches with a method in Subclass having same signature
(name, plus the number and the type of its parameters) and return type.
Then Subclass method overrides a method from the SuperClass.
Example:
=========
public class Car
{
public void speed()
{
Syso("max 100 kms");
}
}
public class SportsCar extends Car
{
public void speed()
{
syso("max 200 kms");
}
}
public static void main(String args[])
{
Car c = new SportsCar();
c.speed();
}
A Super Class can hold its subclass objects. It is known as upcasting.
SuperClass s =new SubClass();
Car c = new SportsCar;
But downcasting is not possible in java.
SubClass s = new SuperClass();
SportsCar s = new Car();
The Binding changes from compile to Run time. Then this binding is known as Dynamic Binding.
And the Binding happens during run time, so we call this as runtime polymorphism.