Hi if I could get some help with this assignment that would be great. Implement

Question

Hi if I could get some help with this assignment that would be great.

Implement a class Car, which contains the fields:

make, e.g. Ford, Subaru, Toyota ...

model, e.g., Escape, Outback, Camry ...

year

MPG miles per gallon

milesDriven, the total number of miles ever driven in this car.

fuelCapacity in gallons, i.e., the size in gallons of the fuel tank.

fuelRemaining, which represents the amount of fuel remaining in the gas tank.

Implement at least the following methods within the Car class:

a constructor, which initializes each of the fields

fillTank(double g), which adds up to g gallons of gas to the fuel tank, but not more than the car's fuel capacity.

drive(double m), which simulates driving m miles in the car, adding to the total number of miles driven, and reducing the amount of gas in the car according to this car's average MPG.

toString( ), which returns a String representation of the car.

getFuelRemaining( ), which returns the amount of fuel left in the tank.

For example, we should be able to do something like the following:

Write a short driver program to test your Car class with a short array of Cars.

Write a class used to represent fractions. It should contains fields for numerator and denominator, and it should be able to perform some simple arithmetic operations.

The fields are:

numerator

denominator

Implement at least the following methods:

public Fraction(int n, int d)

Constructor that creates a Fraction with numerator and denominator d. If d is 0, throw an ArithmeticException. This can be done with the statement throw new ArithmeticException();

public int getNum()

Returns the value of the numerator field

public int getDenom()

Returns the value of the denominator field

public void setNum(int n)

Sets the numerator field to the value given in n

public void setDenum(int d)

Sets the denominator field to the value given in d. If d is 0, throw an ArithmeticException.

public Fraction add(Fraction a)

Returns the fraction that is the sum of the subject of the method and a. For example (new Fraction(3,4)).add(new Fraction(1,4)) is 16/16 i.e 1/1 We sum the fractions a/b and c/d as (a*d+b*c)/b*d then reduce.

public boolean equals(Fraction a)

Returns true if subject of method and argument of call are equal. Fractions a/b and c/d are equal if a*d and b*c are equal or since the fractions are normalized, if a==c and b==d.

public String toString()

Returns a String representation of the fraction. For example, if the numerator is 1 and the denominator is 2, the String "1/2" is returned.

Fractions should be stored in reduced form. For example, 2/4, 3/6, 4/8, etc. should all be stored as 1/2. 4/10 should be stored as 2/5. Use the Euclidean Algorithm for determining the greatest common divisor, so that you can store fractions in reduced form.

Write a simple main driver method to test your fraction class and each of its methods.

Explanation / Answer

import java.util.*;

class Car
{
    private String make;
    private String model;
    private int year;
    private double milesDriven;
    private double MPG;
    private double fuelCapacity;
    private double fuelRemaining;
  
    //argument constructor
    public Car(String make,String model,int year,double milesDriven,double fuelCapacity,double fuelRemaining)
    {
        this.make = make;
        this.model = model;
        this.year = year;
        this.milesDriven = milesDriven;
        this.fuelCapacity = fuelCapacity;
        this.fuelRemaining = fuelRemaining;
        this.MPG = milesDriven/fuelRemaining; //compute MPG
    }
    public void drive(double m)
    {
        milesDriven = milesDriven + m;
        fuelRemaining = milesDriven/MPG;
      
    }
    public void fillTank(double g)
    {
        if(g < fuelCapacity)
        fuelRemaining = fuelRemaining +g;
      
    }
    public double getFuelRemaining()
    {
        return fuelRemaining;
    }
    public String toString()
    {
     return "Make : "+make+ " Model : "+model + " Year : "+year + " Miles Driven : "+milesDriven+" Fuel Capacity : "+fuelCapacity +" Fuel Remaining : "+fuelRemaining;        
    }
  
  
}

class TestCar
{
   public static void main (String[] args)
   {
       Car oldJunker = new Car("Ford","Pinto", 1972, 17.5, 12, 8); // creates a new Car object
    oldJunker.drive(5); // drives the Car 5 miles
    oldJunker.fillTank(1); // put in a gallon of gas
    System.out.println(oldJunker.getFuelRemaining()); // prints the amount of fuel left
    System.out.println(oldJunker); // prints the attributes of the car to the screen
   }
}

output:

class Fraction
{

private int numerator;
private int denominator;

public Fraction() //default constructor
{
    numerator = 0;
    denominator = 1;
}

public Fraction (int n, int d)//argument constructor
{
numerator = n;
if(d == 0)
throw new ArithmeticException();
else
denominator = d;
}
//get methods
public int getNum()
{
    return numerator;
}

public int getDenom()
{
    return denominator;
}
//set methods
public void setNum(int n)
{
    this.numerator = n;
}

public void setDenum(int d)
{
    if(d == 0)
    throw new ArithmeticException();
    else
    this.denominator = d;
}
public Fraction add(Fraction a) //add fractions
{
this.numerator = this.numerator *a.denominator + a.numerator*this.denominator;
this.denominator = this.denominator * a.denominator;
return this;
  
}

public boolean equals(Fraction a) //compare two fractions
{
  
    if(numerator == a.numerator && denominator == a.denominator)
    return true;
    else
    return false;
}

public String toString () { return numerator + "/" + denominator; }

public void reduce() {

int factor;
factor = gcd(numerator, denominator);
numerator = numerator / factor;
denominator = denominator / factor;
}

private int gcd (int x, int y) {

int t;
while (y>0) {
t = x % y;
x = y;
y = t;
}
return x;
}

}
class TestFraction
{
    public static void main (String[] args)
    {
        Fraction f1 = new Fraction(3,4);
      
        Fraction f2 = new Fraction(1,4);
      
        Fraction sum = new Fraction();
      
        sum = f1.add(f2);
        sum.reduce();
      
        System.out.println("Sum of fractions = "+sum);
      
        if(f1.equals(f2))
        System.out.println("Fraction f1 is equal to fraction f2");
        else
        System.out.println("Fraction f1 is not equal to fraction f2");
      
      
  
      
      
      
    }
}

Output:

Sum of fractions = 1/1

Fraction f1 is not equal to fraction f2

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