Overriding concept

Sachin Jain · 2010-12-11T21:18:59+00:00

Suppose we have a base class A and a derived class B. A and B both have same method as:- void show() { <----- ------> } Now in class B we also define show method with some other definition. We say now show method is overridden. But now i want to access the base class's show method using object of derived class. Can we do that ?

Overriding concept

Sachin Jain
@sachin-0wuUmc

Updated: Oct 17, 2024

Views: 959

Suppose we have a base class A and a derived class B.

A and B both have same method as:-

void show() {
<-----
------>
}

Now in class B we also define show method with some other definition.
We say now show method is overridden.

But now i want to access the base class's show method using object of derived class.
Can we do that ?

0

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csiscool

Member • Dec 11, 2010

ya we can 😀 But you need to assign the base class instance to child class instance.

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Sachin Jain

Member • Dec 12, 2010

@ csiscool

Can you please explain more ?

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csiscool

Member • Dec 12, 2010

What is the real purpose of doing so?

PS: google it. you can find it

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Morningdot Hablu

Member • Dec 13, 2010

Yes you can by overloading concept..
Check this code...

class k
{
public void show(int x)
{
System.out.println("mohit kumar singh ");
}
}
public class p extends k
{
public void show()
{
System.out.println("mohit cboy hack the world");
}
public static void main(String args[])
{
k k1;
p p1=new p();
k1=p1;
p1.show(2);
p1.show();
}
}
Otherwise it will hide the method of base class.

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csiscool

Member • Dec 13, 2010

mohit007kumar00
Yes you can by overloading concept..
Check this code...

Otherwise it will hide the method of base class.
Hey he is asking in the case of overriding., but you have posted in overloading,why?

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Deepika Bansal

Member • Dec 13, 2010

Yes you can do this using scope resolution operator, SRO ( :: ).


public class A   //base class
{
  public void show()
  {
    System.out.println("In base class");
  }
}

public class B extends A   //derived class
{
  public void show()   //over-ridden function
  {
    A::show();   //calling the function of base class
    System.out.println("In derived class");
  }
}

And not just this, you can use SRO to resolve other type of ambiguities also like between a global and a local variable with same variable name..

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Insatiable

Member • Dec 14, 2010

Polymorphism With Function Overloading is a way out :-
class a{
void show(String x){System.out.println(x);}
}
class b extends a{
void show(String x, String y){}
}
class c {
public static void main(String []args){
a a1 = new b();
a1.show("base");
}
}

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Sachin Jain

Member • Dec 15, 2010

But i wanted over-ridden method of parent class to be called using object of derived class.
Please do not confuse with over-loading.
I hope i am clear now.

I have to call an over-ridden method of parent class using object of derived class.
Is that possible ?

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Insatiable

Member • Dec 15, 2010

then there is no way out because if you want object of derived class with overriding it wont work because its the REFERENCE variables who decide which method to call while using function overriding and not the Objects.

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