MM

import java.util.Random;

public class FillTheBoard {

    public static void main(String[] args) {
        int row = 16;
        int col = 16;
        int numberOfMines = 49;
        int[][] board = new int[row][col];


        placeMines(board, numberOfMines, row, col);

        countMines(board);

        printBoard(board);

    }

    public static void placeMines(int[][] mineField, int mines, int row, int col) {
        Random random = new Random();
        int minesPlaced = 0;

        while(minesPlaced < mines) {
          int x = random.nextInt(row); // a number between 0 and mWidth - 1
          int y = random.nextInt(col);
          // make sure we don't place a mine on top of another
          if(mineField[y][x] != 9) {
              mineField[y][x] = 9;
            minesPlaced ++;
          }
        }
    }

    public static void countMines(int[][] board) {
        int mines = 0;
        for (int i = 0; i < board.length; i++) {
            for (int j = 0; j < board[i].length; j++) {
                if (board[i][j] == 9)
                    mines++;
            }
        }

        System.out.println(mines);
    }

    public static void printBoard(int[][] board) {
        for (int i = 0; i < board.length; i++) {
            for (int j = 0; j < board[i].length; j++) {
                System.out.print(board[i][j] + " ");
            }
            System.out.println();
        }
    }

}