package Homework;

abstract class Vehicle {
    public abstract void run();
}
class Car extends Vehicle{
    @Override
    public void run(){
        System.out.println("car is running");
    }
}
class Bike extends Vehicle{
    @Override
    public void run(){
        System.out.println("bike is running");
    }
}
class Truck extends Vehicle{
    @Override
    public void run(){
        System.out.println("truck is running");
    }
}
class VehicleTest{
    public static void main(String[]args){
        Vehicle[] vehicles=new Vehicle[3];
        vehicles[0]=new Car();
        vehicles[1]=new Bike();
        vehicles[2]=new Truck();
        for(Vehicle i :vehicles){
            i.run();
        }
    }
}