Java gomoku minimax -

i'm trying create strategy play against human or strategy game gomoku. have kind of minimax function, although don't quite understand how work , have getscore function, should send best score minimax ? problem getscore function not recognize if there 4 or 5 circles in row/col/diagonally.

here code:

public class jarmostrategyv1 implements computerstrategy {      public static int lrow = 0;     public static int lcol = 0;     public static int drow = 0;     public static int dcol = 0;     public static final int e = 0;     public static final int x = 1; // black     public static final int o = -1; // white     public static final int winscore = 100;     private static final int wincount = 5;       public location getmove(simpleboard board, int player) {         // let's operate on 2-d array         int[][] b = board.getboard();         system.out.println(getscore(b, player));         (int row = 0; row < b.length; row++) {             (int col = 0; col < b[0].length; col++) {                 if (b[row][col] == simpleboard.empty) {                     // first empty location                     return new location(row, col);                 }             }         }         return null;     }       @override     public string getname() {         return "student name";     }     public static int minimax(int[][] board, int player, int depth) {          if (getscore(board, player) == winscore) {             //             return winscore;         }          if (depth == 2) {             return getscore(board, player);         }          int max = integer.min_value;         if (player == -1){             max = integer.max_value;         }          system.out.println(max);          list<location> possiblemoves = getpossiblemoves(board);         (location loc : possiblemoves) {              board[loc.getrow()][loc.getcolumn()] = player;             int newplayer = 0 - player;             if(newplayer == 1){                 int value = minimax(board, newplayer,depth + 1);                 if(value < max) {                     max = value;                 }             }             if (newplayer == -1){                 int value = minimax(board, newplayer, depth + 1);                 if (value > max) {                     max = value;                 }             }              board[loc.getrow()][loc.getcolumn()] = e;         }          return max;     }     public static int getscore(int[][] board, int muutuja) {          //int yks = 0;          (int row = 0; row < board.length; row++) {             (int col = 0; col < board[row].length; col++) {                 if (board[row][col] == muutuja) {                     if (row <= (board.length - 5)) {                         if (col <= board.length && getcount(board, row, col, 0, 1, muutuja, wincount) >= (wincount - 1) && getcount(board, row, (col + 4), 0, 1, e, 1 ) >= 1) return 1; // - 4 in row                         if (row >= 1 && getcount(board, row, col, 1, 0, muutuja, wincount) >= (wincount -1) && getcount(board, (row - 1), col, 1, 0, e, 1) == 1) return 1;                           if (getcount(board, row, col, 1, 0, muutuja, wincount) >= wincount) return 100; // | 5 in row                         if (col <= wincount && getcount(board, row, col, 1, 1, muutuja, wincount) >= wincount) return 100; // \                         if (col >= wincount && getcount(board, row, col, 1, -1, muutuja, wincount) >= wincount) return 100; // /                                             }                     if (col <= wincount && getcount(board, row, col, 0, 1, muutuja, wincount) >= wincount) return 100; // -                  }             }         }         return 0;     }      public static int getcount(int[][] board, int row, int col, int rowd, int cold, int player, int test) {          int count = 0;         (int = 0; < test; i++) {             if (board[row + * rowd][col + * cold] == player) count++;             else break;         }         return count;     }      public static arraylist<location> getpossiblemoves(int[][] board) {         arraylist<location> availablemoves = new arraylist<location>();         (int row = 0; row < board.length; row++) {             (int col = 0; col < board[row].length; col++) {                 if (board[row][col] == e) {                     availablemoves.add(new location(row, col));                 }             }         }         return availablemoves;     }   } 

there seems kind of problem getscore, when run code can play while until gomoku app crashes.

if want try out can open via eclipse. download project file: http://www68.zippyshare.com/v/fewl2qwc/file.html import eclipse projects/workspace. , have build path 2 jar files in lib folder. note: can edit files in gomoku.strategies package.

the stacktrace shows exception. add debug print or run debugger

java.lang.illegalargumentexception: it's computer's turn, pass player makemove()         @ gomoku.game.makemove(game.java:476)