恼人的Critter网格世界案例研究

我在APCS，我必须对小动物类进行扩展，使小动物随机选择网格中的任何参与者，然后移动到它的位置；从而"跟随"它。我的老师给了我们开始上课的名称和方法名称，这些名称不能更改。这是一个无法改变的跑步者。

import java.awt.Color;
import info.gridworld.actor.Rock;
import info.gridworld.actor.Actor;
import info.gridworld.actor.Flower;
import info.gridworld.actor.Bug;
import info.gridworld.grid.Location;
import info.gridworld.grid.BoundedGrid;
import info.gridworld.actor.ActorWorld;
public class AnnoyingCritterRunner
{
 public static void main(String[] args)
 {
  ActorWorld world = new ActorWorld(new BoundedGrid<Actor>(8,8));
  world.add(new Location(1, 1), new AnnoyingCritter());
  world.add(new Location(3, 1), new Rock());
  world.add(new Location(5, 2), new Actor());
  world.add(new Location(7, 6), new Flower());
  world.add(new Location(6, 6), new Actor());
  world.add(new Location(0, 5), new Actor());
  world.add(new Location(2, 6), new Bug(Color.GREEN));
  world.add(new Location(3, 5), new Actor());
  world.show();
 }
}

AnnoyingCritter类必须包含小动物找到"最好的朋友"one_answers"跟随它"所需的所有方法。

import info.gridworld.actor.Actor;
import info.gridworld.actor.Critter;
import info.gridworld.grid.Location;
import java.awt.Color;
import java.util.ArrayList;
public class AnnoyingCritter extends Critter
{
 /* instance variables will be needed
  * one for the bFF and one to set whether this Critter has a bFF (a boolean)
  */
  public AnnoyingCritter()
  {
    /* make an AnnoyingCritter constructor that sets a color and starts with the 
  * boolean variable above being "false"
  */
    Critter AnnoyingCritter = new Critter();
    AnnoyingCritter.setColor(Color.green);
  }
  private void pickBFF()
 {
    /* you'll need the grid, occupied locations, and some randomness to pick a friend
    */
 }
 public void processActors( ArrayList<Actor> actors)
 {
   /* this can be simple or complicated.  the idea is to pick a BFF if 
    * one is needed
    */
  if( !hasFriend )
  {
  }
//and it eats flowers and rocks
  for( Actor dude : actors )
  {
  }
 }
 public Location selectMoveLocation( ArrayList<Location> locs )
 {
  //you need a Grid
   //you need a location
  //you need to know where to go and if it's clear to move and then go there
 }
}

恼人的叫声必须移动到它随机选择的演员的位置，并吃掉挡住去路的花朵和岩石。它还需要一次移动到演员所在的位置一个空间。我不知道如何让这只烦人的小动物找到演员在哪里，然后随机找到一个。进口也不能改变。

请帮帮我，因为我已经被困了好几个小时了。