问2D Checker Board Java数组未正确打印

EN

class CheckerBoard
{
   public static void main(String[] args)
   {
   int[][] board = new int[8][8];
   int r = 0;
   int c = 0;
   int i = 0;
   for(r = 0; r < 7; r++){
      for(c = 0; c < 7; c++)
         if((i % 2) == 0)
            board[r][c] = 'B';
         if((i % 2) != 0)
            board[r][c] = 'W';
         i++;
      }
      System.out.print(board[r][c]);                 
   }
}