Dynamic binding vs Polymorphism

[Navatha]

Hi All ,
Can anyone please explain me the difference between dynamic binding and polymorphism and when do we use them.

Thanks in Advance
navatha

[JosAH]

Can anyone please explain me the difference between dynamic binding and polymorphism and when do we use them.

Is Google down in your part of the world?

kind regards,

Jos

[Zack]

Dynamic Binding is having two objects who are both parented by the same class but are of differing classes. They both have an extension of a method in their parent class, and when it is called ambiguously, either method can be called. Example:

public class Human {
	public void SayHello() {
		// Empty
	}
}

public class Man extends Human {
	@Override
	public void SayHello() {
		// Code for a man to say hi
	}
}

public class Woman extends Human {
	public void SayHello() {
		// Code for a woman to say hi
	}
}

public class SomeOtherClass {
	@Override
	public void SomeFunc(Human x) {
		x.SayHello();
	}
}

This is an example of a situation involving dynamic binding. Notice how the x object passed is a Human, but when SayHello() is called it will select the SayHello() pertinent to the object, be it a Human, Man, or Woman.

Polymorphism is a broader term that simply allows multiple object types (classes) to be handled by the same interface, such as having both Man and Woman be handled by Human. (Not really an interface in this case, but the same idea.)

Wikipedia can elaborate further. Best of luck!

[Navatha]

thank you zack

[icodeurmom]

FYI, why make a forum when people just reply with is "google down?"

I googled this and ended up here, giving this site more attention, and it might have even been new members. After reading a moderator post a rude comment, I have deflected my interests elsewhere looking for a nicer, more mature community. Kthxbai

Kind regards,

ICodeUrMom

Is Google down in your part of the world?

kind regards,

Jos

[JosAH]

FYI, why make a forum when people just reply with is "google down?"

I googled this and ended up here, giving this site more attention, and it might have even been new members. After reading a moderator post a rude comment, I have deflected my interests elsewhere looking for a nicer, more mature community. Kthxbai

Why answer a question that has been asked (and answered) so many times? Google is a better place for that instead of wasting others' time.

kind regards,

Jos

[trevMD]

well, the answer was partially complete. Dynamic binding occurs during runtime, when the compiler cannot determine the concrete class type (vs static binding)