// TestVehicle.java

class TestVehicle {

    public static void main(String[] args) {

        Vehicle car = new Vehicle();
        car.setTopSpeed(200);

        car.changeTopSpeed3(230);
        System.out.println(car.getTopSpeed());

        System.out.println(car.changeTopSpeed1(210));
        System.out.println(car.getTopSpeed());

        System.out.println(car.changeTopSpeed2(220));
        System.out.println(car.getTopSpeed());

        int myTopSpeed = 155;
        car.maximiseTopSpeed(myTopSpeed);
        System.out.println(car.getTopSpeed());
        System.out.println(myTopSpeed);
    }

}