I really don’t know what the keyword for my situation. Please edit the title post if possible.

I have three classes:

1. Vehicle (abstract class)
2. AutomatedVehicle (abstract class)
3. AutomatedAuto (concrete class)

AutomatedAuto extend AutomatedVehicle and AutomatedVehicle extend Vehicle

• Vehicle class has 3 abstract method: drive(), park(), makeNoise()

• AutomatedVehicle implemets park(), drive() as follow:

    public void park() {
        autoPark();
    }

    public void drive() {
        autoDrive();
    }

    abstract void autoPark();

    abstract void autoDrive();

• AutomatedVehicle

    public void autoDrive() {
        System.out.println("Driving it myself");
    }

    public void autoPark() {
        System.out.println("Parking it myself");
    }

    public void makeNoise() {
        System.out.println("Beep, Beep");
    }

I understand the final result. But I don’t understand why they write code like like this. I want to explore some problem relevant to implement park(), drive() at AutomatedVehicle.

Thanks