Fighter Rankings Extended

import java.util.*;

public class Fighter implements Comparator<Fighter> {

   public String name;
   public int atk, def, powerLevel;
   public static List<Fighter> fighters = new ArrayList<Fighter>();

   public Fighter(String name, int atk, int def){
      this.name = name;
      this.atk = atk;
      this.def = def;
      this.powerLevel = CalculatePowerLevel(atk, def);
      }

   public int CalculatePowerLevel(int atk, int def){
      return atk * def;
      }

   public static void main(String[] args){
      fighters = new ArrayList<Fighter>();
      Scanner console = new Scanner(System.in);
      boolean inLoop = true;
      do{
      System.out.println("What is the name of the fighter?");
      String name = console.next();
      System.out.println("What is the Attack stat of " + name + "?");
      int atk = console.nextInt();
      System.out.println("What is the Defense stat of " + name + "?");
      int def = console.nextInt();
      Fighter currentFighter = new Fighter(name, atk, def);
      fighters.add(currentFighter);
      System.out.println("Add 1 more fighter? Type in 'true' to confirm or 'false' to cancel.");
      inLoop = console.nextBoolean();
      } while(inLoop);
      Collections.sort(fighters, new Fighter("None", 0, 0));
      System.out.println("The strongest fighters by power level are: ");
      for(Fighter fighter : fighters) System.out.println(fighter.name);
      }

   @Override
   public int compare(Fighter a, Fighter b){
      return b.powerLevel - a.powerLevel;
   }

}