public class Driver
{
    public static void main(String [] args)
    {
	Person regPerson = new Person();
	Hero supPerson = new Hero();
	Dog rover = new Dog();
       

	// Instanceof checks if the object is a certain type or
	// a subclass of that type (e.g., a Hero is a Person)
	if (regPerson instanceof Person)
	    System.out.println("regPerson is a type of Person");
	if (supPerson instanceof Person)
	    System.out.println("supPerson is also a type of Person");
	// Checks for non-hierarchical: Compiler prevents non-sensical checks
	//if (rover instanceof Person)
	//    System.out.println("[Should never appear]: rover is also a " +
	//		       "type of Person");

	if (supPerson instanceof Hero)
	    System.out.println("supPerson is a type of Hero");
	// Checks within hierarchy: Compiler doesn't prevent 
	if (regPerson instanceof Hero)
	    System.out.println("[Should never appear]: regPerson is a type "+ 
			       "of Hero");


    }
}