Question

Explain the java class below, how it make:

import java.util.*;
import java.util.concurrent.TimeUnit;
public class RacingGame {
  
   ArrayList<Driver> player = new ArrayList<Driver>();
   CarType car = new CarType("Ferrari","2018",280,90,15);
   Formula formula = new Formula(5);// number of laps
   long startTime = System.currentTimeMillis();
   long currentTime = System.currentTimeMillis();
   int totalDis = 0;
  
   public static void main(String[] args)
   {
       RacingGame formulaRace = new RacingGame();
       formulaRace.player.add(new Driver("Saleh",10,3));
       formulaRace.formula.setDistance(20);//lap distance
       formulaRace.totalDis = formulaRace.formula.getTotalDistance();
       formulaRace.formula.setDistance(formulaRace.totalDis);
       formulaRace.raceStatus();
   }
  
   public void raceStatus()
   {
       int newSpeed = 0;
       long diff = 0;
       long sec = 0;
       while (formula.distance > 0)
       {
          
           currentTime = System.currentTimeMillis();
           diff = currentTime - startTime;
           sec = diff/1000;
           newSpeed = (int) sec * car.getAcceleration();
           car.setSpeed((int)(newSpeed + (newSpeed* ((double)player.get(0).getExperince()/10) * ((double)player.get(0).getLevel()/100))));
           int newDistance = (int) (formula.distance - ((car.getSpeed()*sec))/3600);
           formula.setDistance(newDistance);
           int traveledDistance = totalDis - newDistance;
           System.out.println("Driver name: " + player.get(0).getPlayerName() + ", current Speed: " + car.getSpeed() + " km/h, Traveled distance: " + traveledDistance + " km");
           try {
               TimeUnit.SECONDS.sleep(1);
           } catch (InterruptedException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           }
       }
       System.out.println("Driver name: " + player.get(0).getPlayerName() + " finished the race in " + sec + " seconds");
       }
      
}

//Driver(String playerName, int year, int level, String experienceType)
//CarType(String model, String year, int maxSpeed, int balance, double acceleration)

Answer 1

Please find the answer below.
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Code execution flow is as below

package c11;
import java.util.*;
import java.util.concurrent.TimeUnit;
public class RacingGame {
  
//declare array list for the driver
ArrayList<Driver> player = new ArrayList<Driver>();

//define class object car
CarType car = new CarType("Ferrari","2018",280,90,15);

//define class object of formula
Formula formula = new Formula(5);// number of laps

//get start time
long startTime = System.currentTimeMillis();

//get current time
long currentTime = System.currentTimeMillis();

//store total distance
int totalDis = 0;
  

//main function
public static void main(String[] args)
{
   //start racing game
RacingGame formulaRace = new RacingGame();

//add player to formula race
formulaRace.player.add(new Driver("Saleh",10,3));
//set distance of 20
formulaRace.formula.setDistance(20);//lap distance
//get total distance
formulaRace.totalDis = formulaRace.formula.getTotalDistance();
//set distance = total distance
formulaRace.formula.setDistance(formulaRace.totalDis);
//get race status
formulaRace.raceStatus();
}
  
//function race status
public void raceStatus()
{
   //start speed to 0
int newSpeed = 0;
//set diff to 0
long diff = 0;
//set sec to 0
long sec = 0;
//while formula distnace is greater than zero
while (formula.distance > 0)
{
     
   //get current time
currentTime = System.currentTimeMillis();
//get total time from start
diff = currentTime - startTime;
//get diff in seconds
sec = diff/1000;
//set new speed = sec * car acceleration
newSpeed = (int) sec * car.getAcceleration();
//set car speed according to experince and level
car.setSpeed((int)(newSpeed + (newSpeed* ((double)player.get(0).getExperince()/10) * ((double)player.get(0).getLevel()/100))));
//get new distance
int newDistance = (int) (formula.distance - ((car.getSpeed()*sec))/3600);
//set distance to formula
formula.setDistance(newDistance);
//get travel distance
int traveledDistance = totalDis - newDistance;
//print driver info
System.out.println("Driver name: " + player.get(0).getPlayerName() + ", current Speed: " + car.getSpeed() + " km/h, Traveled distance: " + traveledDistance + " km");
try {
   //wait for 1 second
TimeUnit.SECONDS.sleep(1);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//print driver info
System.out.println("Driver name: " + player.get(0).getPlayerName() + " finished the race in " + sec + " seconds");
}
  
}