How to use polymorphism to make list with different types in java?

Question

I have 3 Classes Circle, Rectangle and Square

I want to get required data for each of above classes and create them by user .

It me

Answer 1

you can use the concept of inheritance to do this. for example, create a Shape class and then make the other classes inherit:

public abstract class Shape {
  public int calculateArea();
}
public class Circle extends Shape {}
public class Square extends Shape {}
public class Rectangle extends Shape {}

Then, you can use list of Shape.