Answer Posted / umanath

This is (Run Time Polymorphism) called Dynamic binding.

for more depth see the bellow example

class A
{
public String msg = "message-A";
public void display()
{
System.out.println(msg);
}
}
class B extends A
{
public String msg = "message-B";
public void display()
{
System.out.println(msg);
}
}

class demo
{
public static void main(String as[])
{
A a = new B() //RUN TIME POLYMORFISM
a.display() //Since a is a object type of class B SO class
B sum
System.out.println("From Main: "+a.msg);
}
}

Out Put:
message-B
From Main: message-A

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