Question

Can someone help me with my Java code error!

Domain

package challenge5race;

import java.util.Random;

public class Car {
  
private int year;
private String model;
private String make;
int speed;

public Car(int year, String model, String make, int speed) {
this.year = year;
this.model = model;
this.make = make;
this.speed = speed;
}

public Car() {
}

public int getYear() {
return year;
}

public void setYear(int year) {
this.year = year;
}

public String getModel() {
return model;
}

public void setModel(String model) {
this.model = model;
}

public String getMake() {
return make;
}

public void setMake(String make) {
this.make = make;
}

public int getSpeed() {
return speed;
}

public void setSpeed(int speed) {
this.speed = speed;
}

@Override
public String toString() {
return "Car{" + "year=" + year + ", model=" + model + ", make=" + make + ", speed=" + speed + '}';
}

public void accelerate()
{
// add a random number between 5 and 70, to the speed field
Random myRan = new Random();

int speedran = myRan.nextInt((70 - 5) + 1) + 5;
speed = speed + speedran;
}

public void brake()
{
// subtract a random number between 5 and 30, to the speed field
Random myRan = new Random();

int speedran = myRan.nextInt((30 - 5) + 1) + 5;
speed = speed - speedran;
  
if (speed < 5)
{
speed = 0;
}

}

  
  
}

Driver

package challenge5race;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;

public class Challenge5Race {

/**
* @param args the command line arguments
*/
static Car [] carArray1;
static Car [] carArray2;
public static void main(String[] args) throws IOException {
// TODO code application logic here
  
createArraysOfCars();
raceArraysOfCars();
  
}
  
public static void createArraysOfCars() throws IOException
{
//createWinnerArray(); -- for each record in winner file, create a car object and store in winner array
// createLoserArray(); -- for each record in loser file, create a car object and store in loser array
// make sure to close both files
  
  
int array1Size = 0;
File aFile = new File("WinnerCarSet1.txt"); //doesn't open file
Scanner inFile = new Scanner (aFile); //opens file
int aYear; //fields
String aModel;
String aMake;
Car aCar;
int index = 4;
int speed;
  
array1Size = inFile.nextInt();
carArray1= new Car [array1Size];

  
while(inFile.hasNext()) //create a loop
{
inFile.nextLine(); // count them
aYear = inFile.nextInt();
aModel = inFile.next();
aMake = inFile.next();
speed = inFile.nextInt();
aCar = new Car (aYear,aModel,aMake,speed);
carArray1[index] = aCar;
index ++;
}
  

inFile.close();
  
  
File aFile2 = new File ("loserCarSet2.txt");
Scanner inFile2 = new Scanner (aFile2);
  
int array2Size = 0;
int index2= 4;
array2Size = inFile2.nextInt();
  
carArray2 = new Car [array2Size];
  
while(inFile.hasNext())
{
inFile2.nextLine();
aYear = inFile2.nextInt();
aModel = inFile2.next();
aMake = inFile2.next();
speed = inFile2.nextInt();
aCar = new Car (aYear,aModel,aMake,speed);
carArray2[index2] = aCar;
index ++;
}
inFile.close();
  
  
  
}
  
public static void raceArraysOfCars() throws IOException
{
//open both files as output, to clear contents
//write the number 4 as the first record in both files.
  
//Outer loop for indexes 0 to length of array1
// nested loop - race 5 times
// call the accelerate and brake method
// for the car at the outerloop index location,
// using both cars from both arrays
// after the nested loop, determine winner of 5 laps, and
// state it, and write the winner car in the winner file,
// and write the loser car in the loser file.
  
//close both files
PrintWriter pw1 = new PrintWriter("winnerCarSet1.txt");
PrintWriter pw2 = new PrintWriter("loserCarSet2.txt");

for (int i = 0; i < carArray1.length && i < carArray2.length; i++) {

// lap race
for (int j = 0; j < 5; j++) {
carArray1[i].accelerate();
carArray1[i].brake();

carArray1[i].accelerate();
carArray2[i].brake();

System.out.println("Car1 " + carArray1[i]);
System.out.println("Car2 " + carArray2[i]);
}

if (carArray1[i].speed > carArray2[i].speed) {
pw1.println(carArray1[i].toString());
pw2.println(carArray2[i].toString());
} else {
pw1.println(carArray2[i].toString());
pw2.println(carArray1[i].toString());
}

}

pw1.close();
pw2.close();
}
  
  
  
}
  

Answer 1

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Random;
import java.util.Scanner;

class Car {
        int year;
        String model;
        String carMake;
        int speed;
        private String make;

        public Car() {
                year = 2018;
                model = "Malibur";
                carMake = "Chevy";
                speed = 90;
        }

        // parameters for constructors
        public Car(int year, String model, String make, int speed) {
                this.year = year;
                this.model = model;
                this.carMake = make;
                this.speed = speed;
        }

        public int getYear() {
                return year;
        }

        public void setYear(int year) {
                this.year = year;
        }

        public String getModel() {
                return model;
        }

        public void setModel(String model) {
                this.model = model;
        }

        public String getCarMake() {
                return carMake;
        }

        public void setCarMake(String carMake) {
                this.carMake = carMake;
        }

        public int getSpeed() {
                return speed;
        }

        public void setSpeed(int speed) {
                this.speed = speed;
        }

        // -----------------------------------------------------------

        @Override
        public String toString() {
                return "" + year + " " + model + " " + carMake + " " + speed;
        }

        // -------------------------------------------------------------
        public void accelerate() {
                Random myRan = new Random();

                int speedr = myRan.nextInt((70 - 5) + 1) + 5;
                speed = speed + speedr;
        }

        public void brake() {
                Random myRan = new Random();

                int speedr = myRan.nextInt((30 - 5) + 1) + 5;
                speed = speed - speedr;

                if (speed < 5) {
                        speed = 0;
                }
        }
}

public class Challenge5Race {

        public static Car carArray1[];
        public static Car carArray2[];
        static String file1 = "winnerCarSet1.txt";
        static String file2 = "loserCarSet2.txt";

        public static void createArraysOfCars() throws FileNotFoundException {
                Scanner reader1 = new Scanner(new File(file1));
                Scanner reader2 = new Scanner(new File(file2));

                int array1Size = Integer.parseInt(reader1.nextLine());
                carArray1 = new Car[array1Size];

                int array2Size = Integer.parseInt(reader2.nextLine());
                carArray2 = new Car[array2Size];

                for (int i = 0; i < array1Size; i++) {
                        String line = reader1.nextLine();

                        String tokens[] = line.split(" ");
                        carArray1[i] = new Car(Integer.parseInt(tokens[0]), tokens[1], tokens[2], Integer.parseInt(tokens[3]));
                }

                for (int i = 0; i < array2Size; i++) {
                        String line = reader2.nextLine();

                        String tokens[] = line.split(" ");
                        carArray2[i] = new Car(Integer.parseInt(tokens[0]), tokens[1], tokens[2], Integer.parseInt(tokens[3]));
                }
        }

        public static void raceArraysOfCars() throws IOException {
                // open both files as output, to clear contents
                // Use the Print Writer to clear the contents
                // write the number 4 as the first record in both files.

                // Outer loop for indexes 0 to length of array1
                // nested loop - race 5 times
                // call the accelerate and brake method
                // for the car at the outerloop index location,
                // using both cars from both arrays
                // after the nested loop, determine winner of 5 laps, and
                // state it, and write the winner car in the winner file,
                // and write the loser car in the loser file.

                // close both files
                PrintWriter pw1 = new PrintWriter("winnerCarSet1.txt");
                PrintWriter pw2 = new PrintWriter("loserCarSet2.txt");

                for (int i = 0; i < carArray1.length && i < carArray2.length; i++) {

                        // lap race
                        for (int j = 0; j < 5; j++) {
                                carArray1[i].accelerate();
                                carArray1[i].brake();

                                carArray1[i].accelerate();
                                carArray2[i].brake();

                                System.out.println("Car1 " + carArray1[i]);
                                System.out.println("Car2 " + carArray2[i]);
                        }

                        if (carArray1[i].speed > carArray2[i].speed) {
                                pw1.println(carArray1[i].toString());
                                pw2.println(carArray2[i].toString());
                        } else {
                                pw1.println(carArray2[i].toString());
                                pw2.println(carArray1[i].toString());
                        }

                }
                
                pw1.close();
                pw2.close();
        }

        public static void main(String args[]) throws IOException {
                createArraysOfCars();
                raceArraysOfCars();
        }
}

please upvote. Thanks!