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Java run time polymorphism
5 Answer(s)      5 years and 10 months ago
Posted in : Java Interview Questions
What is run-time polymorphism or dynamic method dispatch ?

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October 29, 2010 at 12:56 PM


Hi Friend,

Dynamic dispatch is a mechanism by which a call to Overridden function is resolved at runtime rather than at Compile time , and this is how Java implements Run time Polymorphism. In dynamic method dispatch,super class refers to subclass object and implements method overriding.

Example:

class Flower {
void which() {
System.out.println("A Beautiful flower.");
}
}
class Rose extends Flower {
void which() {
System.out.println("Rose");
}
}
class Lotus extends Flower {
void which() {
System.out.println("Lotus.");
}
}
class Test {

public static void main(String[] args) {
Flower ref1 = new Flower();
Flower ref2 = new Rose();
Flower ref3 = new Lotus();
ref1.which();
ref2.which();
ref3.which();
}
}

Thanks



June 21, 2012 at 1:15 PM


A Beautiful flower.

Rose

Lotus.



June 21, 2012 at 1:15 PM


A Beautiful flower.

Rose

Lotus.



June 21, 2012 at 1:15 PM


A Beautiful flower.

Rose

Lotus.



October 5, 2012 at 12:31 PM


what is run time resolving










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