LeetCode: Battleships in a Board

1 public class Solution {
2     public int countBattleships(char[][] board) {
3         int ans = 0;
4         for (int i = 0; i < board.length; i++) {
5             for (int j = 0; j < board[0].length; j++) {
6                 if (board[i][j] == 'X' && ((i != 0 && board[i-1][j] != 'X') || i == 0) && ((j != 0 && board[i][j-1] !='X') || j == 0))
7                     ans++;
8             }
9         }
10         return ans;
11     }
12 }