overloading n overriding

[devender negi]

How we decide overloading and overriding with object ref..like


class A {} class B extends A {} class C extends B {}
class D {
void m1(A a) {System.out.print("A");}
void m1(B b) {System.out.print("B");}
void m1(C c) {System.out.print("C");}
public static void main(String[] args) {
A c1 = new C(); B c2 = new C(); C c3 = new C(); D d1 = new D();
d1.m1(c1); d1.m1(c2); d1.m1(c3);
}}
what will be output.

Thanks

[Deepak Bala]

Run it and you will get the output. Please also use code tags when you want to display code.

What is it about overriding and overloading that you do not understand. Telling us more will allow us to help you better

[fred rosenberger]

also, please tell us WHERE this question is from. we take copywrite issues seriously here, and quoting something without attributing it is a violation of our policies.

[Ramesh Meher]

Consider reading this recent post.

http://www.coderanch.com/t/268792/java-programmer-SCJP/certification/Overloading-vs-Overriding

That might help

[Eduardo Mendes]

Hi,

in class D you have three overloaded versions of m1(). When calling an overloaded method, the type of the arguments you pass dictate which overloaded version will be picked-up.

In your example, even though all the three object references point to the same object type (C), the object references themselves are of types A, B and C. Therefore, versions m1(A a), m1(B b) and m1(C c) will be called, printing 'ABC'.

Hope this helps.

[Sunny Jain]

This is simple case of Overloading, scratch a little bit of your mind, you will get the answer.

[Tusshar Fasate]

output will be
ABC

[devender negi]

Thanks.
i got this question from my institute paper.n idnot know from where they got it