class Animal { public String toString() { return "This is an animal ";
}
} class Dog extends Animal { public void sound() {
System.out.println("Woof Woof");
}
} public class MainClass { public static void main(String[] a) {
Dog aDog = new Dog(); if (aDog instanceof Animal) {
Animal ani = (Animal) aDog;
System.out.println(ani);
}
}
}