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polymorphism

madhu chakkaravarthy
Greenhorn

Joined: Sep 14, 2007
Posts: 8
example for polymorphism.
rakesh sugirtharaj
Ranch Hand

Joined: Dec 16, 2007
Posts: 151
I answer this with the assumption that you know Inheritance..

Say you have a parent class Vehicle and child classes Car, Bike and Bus.

Now you are writing the method to fill gas in your respective vehicles.

Without Polymorphism, the code will be like this
//for car
void fillGas_Car(Car myCar){
//code to fill gas
}

//for bike
void fillGas_Bike(Bike myBike){
//code to fill gas
}
and similarly for Bus also........

Polymorphism makes this simple.......

//write one generic method for vehicle
void fillGas_Vehicle(Vehicle myVehicle){
//code to fill gas
}

Poly-many morph-forms..
Here myVehicle can take the form of a car or a bike or a bus or any vehicle extending from it..

I hope that makes it clear!!!


Cheers!
RSR
Ilja Preuss
author
Sheriff

Joined: Jul 11, 2001
Posts: 14112
http://www.javaranch.com/campfire/StoryPoly.jsp


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It is sorta covered in the JavaRanch Style Guide.
 
subject: polymorphism
 
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