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

Java Programming Language Class, Object and Methods in java (Article) Class, Object and Methods in java (Program)

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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 . . .

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