public class car {
    private String registration;
    private int doors;
    private String colour;
    private carDealer supplier;
    private static int totalCars = 0;
    public car() {
        this.registration = null;
        this.doors = 0;
        this.colour = null;
        this.supplier = null;
        ++totalCars;
    }
    public car(
            String registration,
            int doors,
            String colour,
            carDealer supplier
    ){
        this.registration = registration;
        this.doors = doors;
        this.colour = colour;
        this.supplier = supplier;
        ++totalCars;
    }

    public static int getTotalCars() {
        return totalCars;
    }

    public static void setTotalCars(int totalCars) {
        car.totalCars = totalCars;
    }

    public String getColour() {
        return colour;
    }

    public void setColour(String colour) {
        this.colour = colour;
    }

    public void setRegistration(String registration) {
        this.registration = registration;
    }

    public String getRegistration() {
        return registration;
    }

    public carDealer getSupplier() {
        return supplier;
    }

    public void setSupplier(carDealer supplier) {
        this.supplier = supplier;
    }
}



package test;

public class carDealer {
	private String dealerID;
	public carDealer(String dealerID){
		this.dealerID = dealerID;
	}

}


package test;

public class driver {
	public static void main(String[]args){
	for (int = 0; int < 3; i++){
		new car();
		System.out.println(car.getTotalCars());
	}
	}
}

}