FlyingTaxi.java

public class FlyingTaxi {
    public String model;
    public int maxAltitude;
    public double fuelLevel;

    public FlyingTaxi(String model, int maxAltitude, double fuelLevel) {
        this.model = model;
        this.maxAltitude = maxAltitude;
        this.fuelLevel = fuelLevel;
    }

    public void displayInfo() {
        System.out.println("The model of the flying taxi is: " + model + "\nThe max altitude of the flying taxi is: " + maxAltitude + "\nThe current fuel level of the flying taxi is: " + fuelLevel);
    }

    public void refuel(double fuelAmount) {
        fuelLevel += fuelAmount;
        System.out.println("The fuel level after the refuel is: " + fuelLevel);
    }

    public void flyToDestination(String destination, double distance) {
        double expense = distance * 2;
        if (fuelLevel >= expense) {
            System.out.println("The fuel needed to reach " + destination + " is: " + expense + "\nTherefore you have enough fuel to reach " + destination);
        } else {
            System.out.println("The fuel needed to be refueled to reach " + destination + " is: " + (expense - fuelLevel));
            refuel(expense - fuelLevel);
        }
    }
}