Java Program to create String to super class type mapping

import java.util.HashMap;
import java.util.Map;
class Vehicle {
}
class Motorcycle extends Vehicle {
}
class Bus extends Vehicle {
}
class Car extends Vehicle {
}
public class Demo {
	public static void main(String... args) {
		Map<String, Vehicle>map = new HashMap<String, Vehicle>();
		map.put("motorcycle", new Motorcycle());
		map.put("bus", new Bus());
		map.put("car", new Car());
		System.out.println(map);
	}
}