public class Image
{
    public Image(int x, int y)
    {
        _theWorld = new Tile[x][y];
    }

    public void placeTile (Tile theTile, int x, int y)
    {
        _theWorld[x][y] = theTile;
    }

    public Tile getTile (int x, int y)
    {
        return _theWorld[x][y];
    }

    private Tile[][] _theWorld;
}
@@ -82,24 +82,161 @@
  Tile%5Bx%5D%5By%5D;
+%0A%0A        for (int i = 0; i %3C x; i++)%0A        %7B%0A            for (int j = 0; j %3C y; j++)%0A                _theWorld%5Bi%5D%5Bj%5D = null;%0A        %7D
 %0A    %7D%0A%0A    

Update Image.java