ProgMasters_CAR

public class Car {

    private Engine engine = new Engine();
    private Wheel[] wheel = new Wheel[4];
    private Door left = new Door();
    private Door right = new Door(); // 2-door


    public Engine getEngine() {

        return engine;
    }

    public Wheel[] getWheel() {

        return wheel;
    }

    public Door getLeft() {
        return left;
    }

    public Door getRight() {
        return right;
    }

    public Car() {
        for(int i = 0; i < 4; i++) {
            wheel[i] = new Wheel();
        }
    }

    public static void main(String[] args) {
        Car car = new Car();

        car.getLeft().getWindow().rollDown();
        car.getLeft().getWindow().rollUp();
            System.out.println();
      //Wheel-en belül inflate metód -> tudjuk felfújni
        car.getWheel()[0].inflate(99);
            System.out.println();
        car.getRight().open();
        car.getRight().close();
            System.out.println();
        car.getEngine().start();
        car.getEngine().rev();
        car.getEngine().stop();
    }
}

//-------------------------------------------------------------------------------------------------

public class Window {

    public void rollUp() {
        System.out.println("The window is rolled up!");
    }

    public void rollDown() {
        System.out.println("The window is rolled down!");
    }
}

//-----------------------------------------------------------------------------------------------------

public class Door {

    private Window window;


    public Door() {

        this.window = new Window();
    }

    public void open() {
        System.out.println("The door is open!");
    }

    public void close() {
        System.out.println("The door is closed!");
    }

    public Window getWindow() {
        return window;
    }
}

//-----------------------------------------------------------------------------------------------------------

public class Engine {

    public void start() {
        System.out.println("The engine starts");
    }

    public void rev() {
        System.out.println("The car moves back");
    }

    public void stop() {
        System.out.println("The car stops");
    }
}

//-------------------------------------------------------------------------------------------------

public class Wheel {

    private int pressure;
    private final int MAX_PRESSURE=100;

    public void inflate(int pressure) {
        if(pressure<MAX_PRESSURE){
            System.out.println("The wheel is under the right air-pressure!");
        }
        else System.out.println("The wheel is totally full of air!");
    }
}