The activity was simple racing simulator and the code that I've come up with is not complete.

import java.util.ArrayList;

public class OOP {
    public static void main ( Static [] args){
        Car MercedesW13 = new Car1();
        MercedesW13.liters = 375;
        MercedesW13.consumeGas();
        System.out.println(MercedesW13.liters);
        MercedesW13.moveUntilNoMoreGas();
        System.out.println(MercedesW13.km);
        System.out.println();

        Car RedBullRB16 = new Car1();
        RedBullRB16.liters = 375;
        RedBullRB16.consumeGas();
        System.out.println(RedBullRB16.liters);
        RedBullRB16.moveUntilNoMoreGas();
        System.out.println(RedBullRB16.km);
        System.out.println();

        Car FerrariF175 = new Car1();
        FerrariF175.liters = 375;
        FerrariF175.consumeGas();
        System.out.println(FerrariF175.liters);
        FerrariF175.moveUntilNoMoreGas();
        System.out.println(FerrariF175.km);
        System.out.println();

        Car McLarenMCL36 = new Car1();
        McLarenMCL36.liters = 375;
        McLarenMCL36.consumeGas();
        System.out.println(McLarenMCL36.liters);
        McLarenMCL36.moveUntilNoMoreGas();
        System.out.println(McLarenMCL36.km);
        System.out.println();

        Car AstonMartinAMR22 = new Car1();
        AstonMartinAMR22.liters = 375;
        AstonMartinAMR22.consumeGas();
        System.out.println(AstonMartinAMR22.liters);
        AstonMartinAMR22.moveUntilNoMoreGas();
        System.out.println(AstonMartinAMR22.km);
        System.out.println();

        RacingSimulator.carsToRace()

    class Vehicle
    {
     public double currentLitersOfGasInTank;
     public double kilometersPerLiter;
     public double totalKilometersTravelled;
     public double speedInMph;

    }

    class Car extends Vehicle
    {
        public void speedInMph()
        {
            this.speedInMph = 120 + (Math.random()*(60-120));
        }

        public void consumeGas()
        {
            this.liters -= 7.5;
        }

        public void moveUntilNoMoreGas()
        {
            this.km += 10;
            if (consumeGas < 500);
            System.out.println();
            
            if (consumeGas >= 500);
            System.out.println("You");
                        break;

                    }
                    else
                    {
                        System.out.println("Your car will need more gas to return.");
                        break;
                    }

        }


    }
    class Racecar extends Car
    {
        public ArrayList<Car> car;


    }
    class RacingSimulator 
    {
        public static void carsToRace(Car c, Racecar r)
        {
           r.car.add(c);
        }

        public static void race(ArrayList<Car> car)
        {

        }    
    
    }
    }
    
}

A class hierarchy or inheritance tree in computer science is a classification of object types, denoting objects as the instantiations of classes inter-relating the various classes by relationships such as "inherits", "extends", "is an abstraction of", "an interface definition". Write a java program with a class hierarchy using the following classes:
Vehicle
Car
Racecar

In the Vehicle class, create the fields called currentLitersOfGasInTank, kilometersPerLiter, and totalKilometersTravelled , all of type double. 
In the Car class, create the methods consumeGas(), and moveUntilNoMoreGas(), both having a return type of void.
consumeGas() - this method decrements the currentLitersOfGasInTank field by 1 every time it is called.
moveUntilNoMoreGas() - this method calls consumeGas() and then increments totalKilometersTravelled by whatever the value of kilometersPerLiter is.  When currentLitersOfGasInTank is 0, it will print "Out of gas".

In the Racecar class, create a string field called raceCarName.


Create another class, RacingSimulator with a static field named carsToRace, which is an ArrayList of Racecars. In this RacingSimulator class, create a static method called race(), which will call each of the racecar's moveUntilNoMoreGas() method.
If two or more cars have the same values for currentLitersOfGasInTank and totalKilometersTravelled, then those cars will obviously have the same totalKilometersTravelled. In this case, just pick any of those cars as the winner.


In your main method, create 5 instances of a Racecar. Initialize the values of raceCarName, currentLitersOfGasInTank and totalKilometersTravelled to be whatever you want for each race car. Add the 5 Racecar objects to the carsToRace field of RacingSimulator, and call RacingSimulator.race(); Your program should print the raceCarName of the car that travelled the most kilometers. Obviously, it should be the car that has the highest value for totalKilometersTravelled .