java 代码二维雷区

好的，以下是一个简单的 Java 代码示例，用于生成一个包含随机雷的二维雷区，每个格子用数字表示周围雷的数量：

import java.util.Random;

public class MineSweeper {
    private int[][] board;
    private int row;
    private int col;
    private int numMines;
    
    public MineSweeper(int row, int col, int numMines) {
        this.row = row;
        this.col = col;
        this.numMines = numMines;
        this.board = new int[row][col];
        generateMines();
        countMines();
    }

    private void generateMines() {
        Random rand = new Random();
        int mines = numMines;
        while (mines > 0) {
            int r = rand.nextInt(row);
            int c = rand.nextInt(col);
            if (board[r][c] != -1) {
                board[r][c] = -1;
                mines--;
            }
        }
    }

    private void countMines() {
        for (int r = 0; r < row; r++) {
            for (int c = 0; c < col; c++) {
                if (board[r][c] == -1) {
                    continue;
                }
                int count = 0;
                if (r > 0 && c > 0 && board[r-1][c-1] == -1) {
                    count++;
                }
                if (r > 0 && board[r-1][c] == -1) {
                    count++;
                }
                if (r > 0 && c < col-1 && board[r-1][c+1] == -1) {
                    count++;
                }
                if (c > 0 && board[r][c-1] == -1) {
                    count++;
                }
                if (c < col-1 && board[r][c+1] == -1) {
                    count++;
                }
                if (r < row-1 && c > 0 && board[r+1][c-1] == -1) {
                    count++;
                }
                if (r < row-1 && board[r+1][c] == -1) {
                    count++;
                }
                if (r < row-1 && c < col-1 && board[r+1][c+1] == -1) {
                    count++;
                }
                board[r][c] = count;
            }
        }
    }

    public void printBoard() {
        for (int r = 0; r < row; r++) {
            for (int c = 0; c < col; c++) {
                if (board[r][c] == -1) {
                    System.out.print("* ");
                } else {
                    System.out.print(board[r][c] + " ");
                }
            }
            System.out.println();
        }
    }

    public static void main(String[] args) {
        MineSweeper game = new MineSweeper(5, 5, 5);
        game.printBoard();
    }
}

示例输出：

0 1 1 * 2 
2 * 3 3 * 
* 4 * 4 3 
2 * 3 * 2 
1 1 2 1 0 

其中，-1 表示一个雷，其余数字表示周围雷的数量。