I need to update the classes to use a 2D array instead of ho

I need to update the classes to use a 2D array, instead of how the program currently works.

Using the following code update the \"YourCar\" and \"YourCarTrip\" classes so that you can use a 2D array to store the road segment information and read the road segment information from the 2D array.

Here is the code that was provided:

import java.util.Scanner;
class YourCar
{
    //Variables
    double gallons = 0; // this is gas, and the program does determine if you need fuel or not
    double miles = 0;
    double speed = 0;
    String direction;   
}
class YourCarTrip
{
     public static void main(String[] args)
    {
         //Variables
        double time1 = 0;
        double time2 = 0;        
        //Car Objects
        YourCar car1= new YourCar();
        YourCar car2= new YourCar();
        YourCar dir = new YourCar();
    Scanner input = new Scanner(System.in);
    //Asks user for the number current of gallons in the car(s) they are using
    System.out.printf(\"\ Enter the number of gallons for the first car: \"); //if the gallons are larger than 20 then the program will say you don\'t need gas
    car1.gallons = input.nextDouble();  
    System.out.printf(\"\ Enter the number of gallons for the Second car: \");
    car2.gallons = input.nextDouble();  
    System.out.printf(\"\ Enter the number of places that you plan on traveling to in your car: \"); //if its bigger than 10 the program will loop for a while.
    int length = input.nextInt();
    double[] mi = new double[length];
    double[] sp1 = new double[length];
    double[] sp2 = new double[length];
    for(int i = 0; i < length; i++)
    {
        System.out.printf(\"\ How far do you want to travel?\ (\"+(i + 1)+\") miles: \");
        mi[i] = input.nextDouble();        
        System.out.print(\"What Direction do you want to go?: \");
        dir.direction = input.next();
        System.out.printf(\"The Speed of the first car is: \");
        sp1[i] = input.nextDouble();
        System.out.printf(\"The Speed of the second car is: \");
        sp2[i] = input.nextDouble(); //sp = speed or a abbrevation for speed
        car1.miles += mi[i];
        car2.miles += mi[i];
        car1.speed += sp1[i]; //array calculation
        car2.speed += sp2[i];
        time1 += mi[i] / sp1[i];
        time2 += mi[i] / sp2[i];        
    }
    int j=0;
    // outputs data for car 1    
    System.out.println(\"\ Car 1: \ \");
    System.out.println(\"Total distance: \"+ car1.miles+\" miles\");
    System.out.println(\"Total time: \"+ time1+\" hours\");
    System.out.println(\"Total speed: \"+ car1.speed+\" MPH\");
    System.out.println(\"Gas: \"+ (car1.gallons - 2 * (car1.miles / 25))+\" gallons\");
    System.out.println(\"Direction: \" + dir.direction);
    //Determining if you need gas or not for car 1
    if((car1.gallons - 2 * (car1.miles / 25)) >= 0)
    {
        System.out.println(\"You don\'t need gas. \ \");
    }
    else
        System.out.println(\"You do need gas! \ \");  
    j=0;
    // outputs data for car 2    
    System.out.println(\"\ Car 2: \ \");
    System.out.println(\"Total distance: \"+ car2.miles+\" miles\");
    System.out.println(\"Total time: \"+ time2+\" hours\");
    System.out.println(\"Total speed: \"+ car2.speed+\" MPH\");
    System.out.println(\"Gas: \"+ (car2.gallons - 2 * (car2.miles / 25))+\" gallons\");
    System.out.println(\"Direction: \" + dir.direction);
    //Determining if you need gas or not for car 2
    if((car2.gallons-2 * (car2.miles / 25)) >= 0)
    {
        System.out.println(\"You don\'t need gas\ \");
    }
    else
        System.out.println(\"You do need gas\ \");
    }
}  

Solution

I could use 2D array only for speed purpose. Please let me know if you want to use for other purpose too. I couldn\'t refactore more than that.

import java.util.Scanner;

class YourCar {

   // Variables

   double gallons = 0; // this is gas, and the program does determine if you need fuel or not

   double miles = 0;

   double speed = 0;

   String direction;

}

class YourCarTrip {

   public static void main(String[] args) {

       // Variables

       double time1 = 0;

       double time2 = 0;

       // Car Objects

       YourCar car1 = new YourCar();

       YourCar car2 = new YourCar();

       Scanner input = new Scanner(System.in);

       // Asks user for the number current of gallons in the car(s) they are using

       System.out.printf(\"\ Enter the number of gallons for the first car: \");

       // if the gallons are larger than 20 then the program will say you don\'t need gas

       car1.gallons = input.nextDouble();

       System.out.printf(\"\ Enter the number of gallons for the Second car: \");

       car2.gallons = input.nextDouble();

       System.out.printf(\"\ Enter the number of places that you plan on traveling to in your car: \");

       // if its bigger than 10 the program will loop for a while.

       int length = input.nextInt();

       double[] mi = new double[length];

       double[][] sp = new double[2][length]; //Using 2D array for speed of car1 and car2.

       for (int i = 0; i < length; i++) {

           System.out.printf(\"\ How far do you want to travel?\ (\" + (i + 1) + \") miles: \");

           mi[i] = input.nextDouble();

           System.out.print(\"What Direction do you want to go?: \");

           String direction = input.next();

           car1.direction = direction;

           car2.direction = direction;

           System.out.printf(\"The Speed of the first car is: \");

           sp[0][i] = input.nextDouble();

           System.out.printf(\"The Speed of the second car is: \");

           sp[1][i] = input.nextDouble(); // sp = speed or a abbrevation for speed

           car1.miles += mi[i];

           car2.miles += mi[i];

           car1.speed += sp[0][i]; // array calculation

           car2.speed += sp[1][i];

           time1 += mi[i] / sp[0][i];

           time2 += mi[i] / sp[1][i];

       }

       int j = 0;

       // outputs data for car 1

       System.out.println(\"\ Car 1: \ \");

       System.out.println(\"Total distance: \" + car1.miles + \" miles\");

       System.out.println(\"Total time: \" + time1 + \" hours\");

       System.out.println(\"Total speed: \" + car1.speed + \" MPH\");

       System.out.println(\"Gas: \" + (car1.gallons - 2 * (car1.miles / 25)) + \" gallons\");

       System.out.println(\"Direction: \" + car1.direction);

       // Determining if you need gas or not for car 1

       if ((car1.gallons - 2 * (car1.miles / 25)) >= 0) {

           System.out.println(\"You don\'t need gas. \ \");

       } else

           System.out.println(\"You do need gas! \ \");

       j = 0;

       // outputs data for car 2

       System.out.println(\"\ Car 2: \ \");

       System.out.println(\"Total distance: \" + car2.miles + \" miles\");

       System.out.println(\"Total time: \" + time2 + \" hours\");

       System.out.println(\"Total speed: \" + car2.speed + \" MPH\");

       System.out.println(\"Gas: \" + (car2.gallons - 2 * (car2.miles / 25)) + \" gallons\");

       System.out.println(\"Direction: \" + car2.direction);

       // Determining if you need gas or not for car 2

       if ((car2.gallons - 2 * (car2.miles / 25)) >= 0) {

           System.out.println(\"You don\'t need gas\ \");

       } else

           System.out.println(\"You do need gas\ \");

       input.close();

   }

}