package edu.ufl.cise.cs1.controllers; import game.controllers.AttackerController; import game.models.*; import java.util.List; import game.system.Pair; public final class StudentAttackerController...

package edu.ufl.cise.cs1.controllers;

import game.controllers.AttackerController;
import game.models.*;
import java.util.List;
import game.system.Pair;

public final class StudentAttackerController implements AttackerController {
public void init(Game game) {
}
public void shutdown(Game game) {
}
public int update(Game game, long timeDue) {
// generating Pair data structure to return both defender and Integer value\

      Pair,Integer> result = nearestDefender(game, false);
      Defender vulnerableDefender = result.first();
      int vulnerableDefenderDistance = result.second();


      result = nearestDefender(game, true);
      Defender normalDefender = result.first();
      int normalDefenderDistance = result.second();

      // checking if there is a defender near me and its not vulnerable
      if(normalDefender != null && (normalDefenderDistance 6)){
return game.getAttacker().getNextDir(normalDefender.getLocation(), false);
      }// if above is false, then there is no threat OR is safe to chase vulnerable
      else if(vulnerableDefender != null){
return game.getAttacker().getNextDir(vulnerableDefender.getLocation(), true);
      }else if (powerPillNear(game)){// if there is a power pill near the attacker, stay there
 XXXXXXXXXXif(normalDefenderDistance 6){//if there is a defender in the way of the vulnerable one, flee instead of chasing
 XXXXXXXXXXreturn eatPill(game);
         }
return game.getAttacker().getReverse();
      }
else if(normalDefenderDistance 6){
return game.getAttacker().getNextDir(normalDefender.getLocation(), false);
      }
else return eatPill(game); //eat power pills

   }
private int eatPill(Game game) {// sends the attacker to eat power pills and when there are none, eat regular pills


      Node _nodePowerPill = game.getAttacker().getTargetNode(game.getPowerPillList(), true);
      Node _nodePill = game.getAttacker().getTargetNode(game.getPillList(), true);
      try {
return game.getAttacker().getNextDir(_nodePowerPill, true);
      } catch (NullPointerException e) {
return game.getAttacker().getNextDir(_nodePill, true);
      }
}
private Pair,Integer> nearestDefender(Game game, boolean bool) { // true for distance from defender to attacker and false for the opposite

      Defender defender = null;
      int tempInt = Integer.MAX_VALUE;

      Node attackerLocation = game.getAttacker().getLocation();
      if (bool) {//checking for the boolean that i passed in when i called the method in Update
 XXXXXXXXXXfor (int i = 0; i 4; i++) {
Defender temp = game.getDefenders().get(i);
 XXXXXXXXXXif (tempInt > temp.getPathTo(attackerLocation).size() && !temp.isVulnerable() && temp.getLairTime() == 0 ) {
defender = temp;
 XXXXXXXXXXtempInt =   temp.getPathTo((attackerLocation)).size();
            }
}
} else {// else for when i need the path from the attacker to the closest defender that is vulnerable

 XXXXXXXXXXfor (int i = 0; i 4; i++) {
Defender temp = game.getDefenders().get(i);
 XXXXXXXXXXif (tempInt > attackerLocation.getPathDistance(temp.getLocation()) && temp.isVulnerable()) {
defender = temp;
 XXXXXXXXXXtempInt = attackerLocation.getPathDistance(temp.getLocation());

            }
}
}
return new Pair<>(defender,tempInt); // return the pair, with the defender and the distance
   }
private boolean powerPillNear(Game game) { // checking for a power pill near the attacker
      List nodes =  game.getAttacker().getLocation().getNeighbors();
      for(int i = 0; i ; i ++) {
if (nodes.get(i) != null && game.checkPowerPill(nodes.get(i))) {
return true;
         }
}
return false;

   }
}

this is my code and it keeps saying "Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 	at java.util.ArrayList.rangeCheck(ArrayList.java:659) 	at java.util.ArrayList.get(ArrayList.java:435) 	at game.system._Actor.getTargetNode(_Actor.java:123) 	at game.system._Attacker.getTargetNode(_Attacker.java:14) 	at edu.ufl.cise.cs1.controllers.StudentAttackerController.eatPill(StudentAttackerController.java:48) 	at edu.ufl.cise.cs1.controllers.StudentAttackerController.update(StudentAttackerController.java:42) 	at game.Exec.runExperiment(Exec.java:136) 	at game.Exec.main(Exec.java:54)"  and I dont know how to fix it.