Note:Runtime polymorphism can't be achieved by data members.

Java Programming Language / Class, Object and Methods in java

1967

---

Program:

 class Parent {
 int age=70;
}
class ChildClass extends Parent{
 int age=20;

 public static void main(String args[]){
  Parent obj=new Child();
  System.out.println(obj.age); // result will be 70
 }
}

Output:

70
Press any key to continue . . .

---

---