Getting there, but not there yet

[Bianchi60]

Hi guys,
Can't believe I didn't see the Game pool earlier, anyways, as I said before, AI is my biggest challenge, and I've almost got it to work. I made a new class called Enemy class, which is compatible only with this game, due how I programmed collision detection. Anyways, I know that the enemy is technically in the grid, but I can't see him, how do I make it so he's visisble?

Here's the code for the game

import java.awt.*;
import java.awt.event.*;
import  sun.audio.*;    //import the sun.audio package
import  java.io.*;
import java.util.ArrayList;
import javax.swing.JOptionPane;
import java.awt.Color;

public class SimpleDemo
{
  
  public static ArrayList<Location> myBlockLocations = new ArrayList<Location>();
  
  public static void main(String[] args)
  {
    play();
  }
  
  
  public static boolean canMove(Location l)
  {
    for (int i = 0; i < myBlockLocations.size(); i++)
      if (myBlockLocations.get(i).equals(l))
      return false;
    return true;
  }
 
  public static void play()
  {
    //create display with each cell of size 64x64 pixels
    new AePlayWave("CallMe.wav").start();
    
    GridDisplay display = new GridDisplay(10,10);
   
    Enemy wolf = new  Enemy();
    
    
    
    Grid<Sprite> grid = display.getSpriteGrid();
    
    display.setTitle("Simple Demo");
    
    display.getColorGrid().put(new Location(1, 5), new Color(0,128,128));
    
    //Create location for block
    myBlockLocations.add(new Location(0,0));
    myBlockLocations.add(new Location(0,1));
    myBlockLocations.add(new Location(0,2));
    myBlockLocations.add(new Location(0,3));
    myBlockLocations.add(new Location(0,4));
    myBlockLocations.add(new Location(0,5));
    myBlockLocations.add(new Location(0,6));
    myBlockLocations.add(new Location(0,7));
    myBlockLocations.add(new Location(0,9));
    myBlockLocations.add(new Location(1,0));
    myBlockLocations.add(new Location(1,4));
    myBlockLocations.add(new Location(1,9));
    myBlockLocations.add(new Location(2,0));
    myBlockLocations.add(new Location(2,1));
    myBlockLocations.add(new Location(2,4));
    myBlockLocations.add(new Location(2,5));
    myBlockLocations.add(new Location(2,6));
    myBlockLocations.add(new Location(2,9));
    myBlockLocations.add(new Location(2,2));
    myBlockLocations.add(new Location(3,9));                   
    myBlockLocations.add(new Location(3,0));
    myBlockLocations.add(new Location(3,2));
    myBlockLocations.add(new Location(4,2));
    myBlockLocations.add(new Location(4,4));
    myBlockLocations.add(new Location(4,5));
    myBlockLocations.add(new Location(4,6));
    myBlockLocations.add(new Location(5,0));
    myBlockLocations.add(new Location(5,9));
    myBlockLocations.add(new Location(6,0));
    myBlockLocations.add(new Location(6,3));
    myBlockLocations.add(new Location(6,4));
    myBlockLocations.add(new Location(6,5));
    myBlockLocations.add(new Location(6,7));
    myBlockLocations.add(new Location(6,9));
    myBlockLocations.add(new Location(7,0));
    myBlockLocations.add(new Location(7,1));
    myBlockLocations.add(new Location(7,2));
    myBlockLocations.add(new Location(7,3));
    myBlockLocations.add(new Location(7,7));
    myBlockLocations.add(new Location(7,9));
    myBlockLocations.add(new Location(8,0));
    myBlockLocations.add(new Location(8,5));
    myBlockLocations.add(new Location(8,7));
    myBlockLocations.add(new Location(8,9));
    myBlockLocations.add(new Location(9,0));
    myBlockLocations.add(new Location(9,1));
    myBlockLocations.add(new Location(9,2));
    myBlockLocations.add(new Location(9,3));
    myBlockLocations.add(new Location(9,4));
    myBlockLocations.add(new Location(9,5));
    myBlockLocations.add(new Location(9,6));
    myBlockLocations.add(new Location(9,7));
    myBlockLocations.add(new Location(9,9));
    
    
    for (int i = 0; i < myBlockLocations.size() ; i++)
      display.getColorGrid().put(myBlockLocations.get(i), Color.GRAY);
    
   
   
    //add object to grid, which will display using file named "hero.gif"
    Sprite hero = new Sprite();
    hero.setImageFileName("tankeast.gif");
    hero.putSelfInGrid(grid, new Location(4, 0));
  
  //Add goal
     Sprite goal = new Sprite();
    goal.setImageFileName("disk.gif");
    goal.putSelfInGrid(grid, new Location(8,1));
     
    wolf.putSelfInGrid(grid, new Location(1,1));
    while (true)
   
     
    
    {
   
//tells the display to pause and redraw itself
      display.pause(100);
      
      int key = display.checkLastKeyPressed();
      
      Location loc = hero.getLocation();
        
      //test if right-arrow pressed
      
      
      
      if (key == KeyEvent.VK_RIGHT)
      {

int col=0;
        /*
        if (Math.random()<.5)  
          row = EnemyLocation.getRow() + 1;
        else
          row = EnemyLocation.getRow();
        */
        
        
        
        
        hero.setImageFileName("tankeast.gif"); 
        if (loc.getCol() + 1 == grid.getNumCols())
        {
          //teleport
          hero.setImageFileName("tankeast.gif");
          Location nextLocation = new Location(loc.getRow(), 0);
          if (canMove(nextLocation))       
            hero.moveTo(nextLocation);        
        }
        
        else
        {
          // normal move
          Location nextLocation = new Location(loc.getRow(), loc.getCol() + 1);
          if (canMove(nextLocation))
            hero.moveTo(nextLocation);
        }
      }
      
      if (key == KeyEvent.VK_LEFT)
      {
 
        
        
        
        hero.setImageFileName("tankwest.gif"); 
        if (loc.getCol() == 0)
        {
          //teleport
          hero.setImageFileName("tankwest.gif");
          Location nextLocation = new Location(loc.getRow(),9);
          
          if (canMove(nextLocation))       
            hero.moveTo(nextLocation); 
        }
        else
        {
          // normal move
          Location nextLocation = new Location(loc.getRow(), loc.getCol() - 1);
          if (canMove(nextLocation))
            hero.moveTo(nextLocation);
          
        }
      }
      
      
      
      if (key == KeyEvent.VK_UP)
      {
        hero.setImageFileName("tanknorth.gif"); 
        if (loc.getRow() == 0)
        {
          //teleport
          hero.setImageFileName("tanknorth.gif");
          Location nextLocation = new Location(9, loc.getCol());
          if (canMove(nextLocation))       
            hero.moveTo(nextLocation);        
        }
        else
        {
          // normal move
          Location nextLocation = new Location(loc.getRow() - 1, loc.getCol());
          if (canMove(nextLocation))
            hero.moveTo(nextLocation);
          
        }
      }
      
      
      
      
      
      if (key == KeyEvent.VK_DOWN)
      {

        
   
        hero.setImageFileName("tanksouth.gif"); 
        if (loc.getRow() == 9)
        {
          //teleport
          hero.setImageFileName("tanksouth.gif");
          Location nextLocation = new Location(0, loc.getCol());
          if (canMove(nextLocation))       
            hero.moveTo(nextLocation);      
        }
        else
        {
          // normal move
          Location nextLocation = new Location(loc.getRow() + 1, loc.getCol());
          if (canMove(nextLocation))
            hero.moveTo(nextLocation);
          
        }
      }
      
      
      
    }
} 
  }

And here's the Enemy Class

import java.awt.*;
import java.awt.event.*;
import  sun.audio.*;    //import the sun.audio package
import  java.io.*;
import java.util.ArrayList;
import javax.swing.JOptionPane;
import java.awt.Color;

public class Enemy
{
  private Grid<Sprite> grid;
  private Location location;
  private static GridDisplay display;
  private static Sprite enemy;
  private static int direction;
  private static int delay = 250;
  
  private static final String NORTH_IMAGE = "wolfnorth.gif";
  private static final String SOUTH_IMAGE = "wolfsouth.gif";
  private static final String EAST_IMAGE = "wolfeast.gif";
  private static final String WEST_IMAGE = "wolfwest.gif";
  
   private static final Color LIGHT_COLOR = new Color(229, 170, 122);
  private static final Color DARK_COLOR = new Color(153, 114, 81);
  
  
    //This should put you in the grid
    public void putSelfInGrid(Grid<Sprite> gr, Location loc)
  {
   
      if (grid != null)
      
        throw new IllegalStateException(
                                      "This sprite is already contained in a grid.");
    
    Sprite sprite = gr.get(loc);
    if (sprite != null)
    
      sprite.removeSelfFromGrid();
    
    grid = gr;
    location = loc;
    
      
  }
  
  //This tells the tank to move
       public static void move()
  {
    if (display == null)
      throw new RuntimeException("World not loaded yet");
    Location loc = enemy.getLocation();    
    Location newLoc = loc.getAdjacentLocation(direction);
    if (!display.getSpriteGrid().isValid(newLoc))
      throw new RuntimeException("Robot tried to move off the world");
    if (display.getSpriteGrid().get(newLoc) != null)
      throw new RuntimeException("Robot tried to move into a wall");
    enemy.moveTo(newLoc);
    display.pause(delay);
  }
     //A left turn is all this tank can do
     public static void turnLeft()
  {
    if (display == null)
      throw new RuntimeException("World not loaded yet");
    direction = (direction + Location.LEFT + 360) % 360;
    if (direction == Location.NORTH)
      enemy.setImageFileName(NORTH_IMAGE);
    else if (direction == Location.SOUTH)
      enemy.setImageFileName(SOUTH_IMAGE);
    else if (direction == Location.EAST)
      enemy.setImageFileName(EAST_IMAGE);
    else
      enemy.setImageFileName(WEST_IMAGE);
    display.pause(delay);
  }
  public static void turnRight()
  {
    turnLeft();
    turnLeft();
    turnLeft();
  }
 //this checks to see if the front is clear
   public static boolean frontIsClear()
  {
    if (display == null)
      throw new RuntimeException("World not loaded yet");
    Location loc = enemy.getLocation();
    Location newLoc = loc.getAdjacentLocation(direction);
    if (!display.getSpriteGrid().isValid(newLoc))
      return false;
    else if (display.getSpriteGrid().get(newLoc) != null)
      return false;
    else
      return true;
  }
  //This makes the Enemy class part sprite
   public Grid<Sprite> getGrid()
  {
    return grid;
  }
   //This finds the enemy's location
    public Location getLocation()
  {
    return location;
  }
 
 

   public static boolean canMove(Location l)
  {
    for (int i = 0; i < SimpleDemo.myBlockLocations.size(); i++)
      if (SimpleDemo.myBlockLocations.get(i).equals(l))
      return false;
    return true;
  }
    public static void setDelay(int milliseconds)
  {
    delay = milliseconds;
  }
}

I realize that I have imported things that I don't use yet, but I just did incase I need them.