car-instrument simulator design a set of classes that work together to simulate

Question

car-instrument simulator

design a set of classes that work together to simulate a car's fuel gauge and odometer. that classes you will design are as follows:

the FuelGauge class: it will know the car's current amount of fuel in gallons

                                report the car's current amount of fuel in gallons

                                be able to increment the amount of fuel by 1 gallon. this simulates putting fuel in the car( max 15 gallons)

                                be able to decrement the amount of fuel by 1 gallon if the fuel is greater than 0 gallons

Odometer class: simulates the cars odometer

                         know the cars current mileage

                         report the cars current mileage

                         able to increment the current mileage by 1 mile with the max odometer reading of 999,999 then resets to 0

                         able to work with the FuelGuage object by decreasing the amount of fuel by 1 gallon every 24 miles

demostrate the classes by creating instances of each. simulate filling the car up with fuel, then run a loop that increments the odometer until the car runs out of fuel. during each loop iteration, print the car's current mileage and amount of fuel.

Odometer + MAX_MILEAGE : int - 999999 + MPG : int = 24 - mileage : int setPOint: int fuelGauge : FuelGauge + Odometer(m : int, + getMileage() : int fg : FuelGauge) + incrementMileage: void FuelGauge + MAXGALLONS = 15 : int - gallons : int - + FuelGauge() + FuelGauge(g : int) + getGallons): int + incrementGallons) : void + decrementGallons) void

Explanation / Answer

class FuelGauge {

final static int MAXIMUM_GALLONS = 15;

private int gallons;

public FuelGauge() {
gallons = 0;
}

public FuelGauge(int gallons) {
if (gallons <= MAXIMUM_GALLONS) {
this.gallons = gallons;
} else {
gallons = MAXIMUM_GALLONS;
}
}

public int getGallons() {
return gallons;
}

public void addGallons() {
if (gallons < MAXIMUM_GALLONS) {
gallons++;
} else {
// TODO: see constructor, throw GasOverflowException
System.out.println("FUEL OVERFLOWING!!!");
}
}

public void burnFuel() {
if (gallons > 0) {
gallons--;
} else {
System.out.println("OUT OF FUEL!!!");
}
}

class Odometer {

public final int MAXIMUM_MILEAGE = 999999;

public final int MPG = 24;

private int initialMileage;
private int mileage;

private FuelGauge fuelGauge;

public Odometer(int mileage, FuelGauge fuelGauge) {
this.initialMileage = mileage;
this.mileage = mileage;
this.fuelGauge = fuelGauge;
}

public int getMileage() {
return mileage;
}

public void addMileage() {

if (mileage < MAXIMUM_MILEAGE) {
mileage++;
} else {
mileage = 0;
}

int driven = initialMileage - mileage;
if (driven % MPG == 0) {
fuelGauge.burnFuel();
}
}
}

public static void main(String[] args) {

CarInstrumentSimulator carInstrumentSimulator = new CarInstrumentSimulator();

FuelGauge fuel = carInstrumentSimulator.new FuelGauge();
Odometer odometer = carInstrumentSimulator.new Odometer(0, fuel);

for (int x = 0; x < FuelGauge.MAXIMUM_GALLONS; x++) {
fuel.addGallons();
}

while (fuel.getGallons() > 0) {

  
odometer.addMileage();

System.out.println("Mileage: " + odometer.getMileage());

System.out.println("Fuel level: " + fuel.getGallons() + " gallons");
System.out.println("------------------------------");
}
}

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