my program loops through images and draws them to the screen. It is supposed to get rid of the black border and resave them. I have the logic to detect how much to cut and how to resave it. How would i resize the window? thanks.

2. public gameState s = new gameState("---------");
3. 
   
4. 
   
5. public void setup()
6. {
7.   size(300, 300);
8.   s.getChildBoards(true);
9. }
10. 
    
11. public void draw()
12. {
13.   background(0);
14. }
15. 
    
16. 
    
18. class gameState
19. {
20.   public String board;
21.   ArrayList children;
22.   
23.   public gameState(String board_)
24.   {
25.     board = board_;
26.     print(board);
27.   }
28.   
29.   public void getChildBoards(boolean turn)
30.   {
31.     char player;
32.     char[] bArray = board.toCharArray();
33.     
34.     if(turn)
35.     {
36.       player = 'x';
37.     }
38.     else
39.     {
40.       player = 'o';
41.     }
42.     
43.     for(int a = 0; a < 9; a++)
44.     {
45.       char[] bArray_ = bArray;
46.       if(bArray[a] == '-')
47.       {
48.         bArray_[a] = player;
49.         children.add(new gameState("---------"));
50.       }
51.     }
52.   }

i get the error at line 49... Thanks for any help :)