class GoKart {
    public static final int MAX_BARS = 8;
    private String color;
    private int barCount;
    private int lapsDriven;

    public GoKart(String color) {
        this.color = color;
    }

    public String getColor() {
        return color;
    }

    public void charge() {
        barCount = MAX_BARS;
    }

    public boolean isBatteryEmpty() {
        return barCount == 0;
    }

    public boolean isFullyCharged() {
        return MAX_BARS == barCount;
    }

    public void drive() {
        drive(1);
    }

    public void drive(int laps) {
        try {
            if (!(laps > barCount)) {
                lapsDriven += laps;
                barCount -= laps;
            } else {
                throw new IllegalArgumentException("Not enough fuel to drive " + String.valueOf(laps) + " more laps");
            }
        } catch (IllegalArgumentException e) {
            System.out.printf("Exception Error Message => " + e.getMessage());
        }
    }
}