Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / durgasri
In runtime polymorphism ... the code is called at run time
according to need or given conditions.
suppose there r two methods namely Add() one in super class
and other is in sub class.both have the same name and same
parameters.
so we have to choose that which method from them shld
called at run time i.e. of super class or of sub class.by
polymorphism we do that.
ex:-
class A
{
int add(){//code of the method}
//some other code
}
class B extends A
{
int add(){//code of the method}
//some other code
}
class AB
{
public static void main(String s[])
{
A ob1;
ob1=new A();
int i=ob1.add();//will call the method of super class.
ob1=new B();// sub class's reference can be assigned to
super class address but not vice versa.to do that we have
to type cast the reference of the sub class in reference of
the super class.
int j=ob1.add();//will call the method of sub class
}
}
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
What does int argc char * argv [] mean?
Difference between start() and run() method of thread class?
Can a class be declared as static?
What is a singleton in genetics?
What is the difference between pass by reference and pass by pointer?
Why is java architectural neutral?
Explain what pure virtual function is?
What are static variables and functions?
Is c better than java?
What do bitwise operators do?
Explain try and catch keywords in java?
What is java object name?
Why array is used in java?
What modifiers may be used with an inner class that is a member of an outer class in java programming?
What is a “stateless” protocol ?
