5 Dynamic dispatch

class base{
    void fn(){
        System.out.println("\nI'm from base class");
    }
}
class derieved1 extends base{
    void fn(){
        System.out.println("\nI'm from derieved1");
    }
}
class derieved2 extends base{
    void fn(){
        System.out.println("\nI'm from derieved2");
    }
}
public class Main
{
    public static void main(String[] args) {
        base obj_base = new base();
        derieved1 obj_d1 = new derieved1();
        derieved2 obj_2 = new derieved2();
        base ref;

        ref = obj_base;
        ref.fn();

        ref = obj_d1;
        ref.fn();

        ref = obj_2;
        ref.fn();

    }
}