后记:经评论区提醒,发现有两个bug没考虑到,感谢大家的提醒
bug1:绘制雷的时候有可能把两个雷随机到同样的位置。解决方法是在绘制雷的for循环内,rRow和rCol生成后做一个检测即可:
/* 绘制地雷 */private void randomBomb() {for (int i = 0; i < bombCount; ++i) {int rRow = (int) (Math.random() * rows);int rCol = (int) (Math.random() * cols);if (state[rRow][rCol] == true) --i;label[rRow][rCol].setIcon(bomb);state[rRow][rCol] = true;/* 有地雷的格子state为真 */}}
思路是在每次生成随机数之后检测一下这个位置是否有雷,有的话就把这次的计数器归位重新生成。bombCount的作用域太大,能在尽量小的范围内解决的问题就不影响它了。
bug2:插旗的位置左键还能点开,解决方法是在左键点击事件触发前做检测:
/* 绘制按钮 */private void randomBtn() {for (int i = 0; i < rows; ++i) {for (int j = 0; j < cols; ++j) {Btn btn = new Btn();btn.i = i;btn.j = j;btn.setBounds(j * BLOCKWIDTH, i * BLOCKHEIGHT, BLOCKWIDTH, BLOCKHEIGHT);this.add(btn);btns[i][j] = btn;btn.addMouseListener(new MouseAdapter() {public void mouseClicked(MouseEvent e) {/* 左键点击,屏蔽插旗格子的点击事件 */ if(e.getButton() == MouseEvent.BUTTON1) {if(click[btn.i][btn.j] != 3) open(btn); } /* 右键点击 */if(e.getButton() == MouseEvent.BUTTON3) placeFlag(btn);}});}}}
思路是禁用插旗格子的左键点击事件。
以下是正文:
学习完java事件处理......老师要求写个乞丐版扫雷......作为一只前端dog果断不能怂阿,于是......
硬着头皮写出来了,参考了如下三份代码:
乞丐版JAVA扫雷
Java语言实现的扫雷游戏(一)
Java语言实现的扫雷游戏(二)
先把代码贴出来,需要注意的东西都写在注释里了,有空把教程写出来
package sixth;import javax.swing.*;
import java.awt.*;
import java.awt.event.*;public class MineClearance {static private int midtime = 3600,mineNum = 0;/* 倒计时时间以及可用旗子数 */private static ImageIcon face = new ImageIcon("E:\\project\\JAVA\\test\\demo\\face.jpg");/* 小黄脸图标 */static private JLabel label1,label2;/* 提示文字 */static private GamePanel gp;/* 雷区 */MineClearance(){/* 绘制窗口 */JFrame f = new JFrame("扫雷");f.setBounds(600,200,500,600);f.setDefaultCloseOperation(3);f.setLayout(null);label1 = new JLabel("剩余时间:" +(midtime / 60 / 60 % 60) + ":"+ (midtime / 60 % 60)+ ":" +(midtime % 60));label1.setBounds(10,20,120,20);f.add(label1);/* 显示旗子数 */label2 = new JLabel("剩余:"+mineNum);label2.setBounds(400,20,120,20);f.add(label2);/* 重置按钮 */JButton bt = new JButton(face);bt.setBounds(230, 15,30,30);bt.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {f.dispose();midtime = 3600;new MineClearance();}});f.add(bt);/* 绘制雷区 */gp = new GamePanel(20,20);gp.setBounds(40,100,400,400);f.add(gp);/* 显示界面 */f.setVisible(true);}/* 倒计时线程 */static class CountDown extends Thread{public void run(){while (midtime > 0){try{-- midtime;label1.setText("剩余时间:" +(midtime / 60 / 60 % 60) + ":"+ (midtime / 60 % 60)+ ":" +(midtime % 60));this.sleep(1000);}catch (Exception e){System.out.println("错误:" + e.toString());}}if(midtime == 0) {gp.showBomb();JOptionPane.showMessageDialog(null,"时间已到","游戏结束",JOptionPane.PLAIN_MESSAGE);}}}public static void main(String[] args){new MineClearance();/* 倒计时 */CountDown cd = new CountDown();cd.start();}/* 修改旗子数 */public static void setMineNum(int i){mineNum = i;label2.setText("剩余:"+mineNum);}
}class GamePanel extends JPanel {private int rows, cols, bombCount,flagNum;private final int BLOCKWIDTH = 20;private final int BLOCKHEIGHT = 20;private JLabel[][] label;private boolean[][] state;private Btn[][] btns;private byte[][] click;private static ImageIcon flag = new ImageIcon("E:\\project\\JAVA\\test\\demo\\flag.jpg");private static ImageIcon bomb = new ImageIcon("E:\\project\\JAVA\\test\\demo\\bomb.jpg");private static ImageIcon lucency = new ImageIcon("E:\\project\\JAVA\\test\\demo\\lucency.png");/* 构造雷区 */public GamePanel(int row, int col) {rows = row;/* 行数 */cols = col;/* 列数 */bombCount = rows * cols / 10; /* 地雷数 */flagNum = bombCount;/* 标记数(用于插旗) */label = new JLabel[rows][cols];state = new boolean[rows][cols];/* 用于存储是否有地雷 */btns = new Btn[rows][cols];click = new byte[rows][cols];/* 用于存储按钮点击状态(0-未点击,1-已点击,2-未点击但周围有雷,3-插旗) */MineClearance.setMineNum(flagNum);setLayout(null);initLable();randomBomb();writeNumber();randomBtn();}public void initLable() {for (int i = 0; i < rows; i++) {for (int j = 0; j < cols; j++) {JLabel l = new JLabel("", JLabel.CENTER);// 设置每个小方格的边界l.setBounds(j * BLOCKWIDTH, i * BLOCKHEIGHT, BLOCKWIDTH, BLOCKHEIGHT);// 绘制方格边框l.setBorder(BorderFactory.createLineBorder(Color.GRAY));// 设置方格为透明,便于我们填充颜色l.setOpaque(true);// 背景填充为黄色l.setBackground(Color.lightGray);// 将方格加入到容器中(即面板JPanel)this.add(l);// 将方格存到类变量中,方便公用label[i][j] = l;label[i][j].setVisible(false);}}}/* 绘制地雷 */private void randomBomb() {for (int i = 0; i < bombCount; i++) {int rRow = (int) (Math.random() * rows);int rCol = (int) (Math.random() * cols);label[rRow][rCol].setIcon(bomb);state[rRow][rCol] = true;/* 有地雷的格子state为真 */}}/* 绘制数字 */private void writeNumber() {for (int i = 0; i < rows; ++i) {for (int j = 0; j < cols; ++j) {if (state[i][j]) {continue;}int bombCount = 0;/* 寻找以自己为中心的九个格子中的地雷数 */for (int r = -1; (r + i < rows) && (r < 2); ++r) {if (r + i < 0) continue;for (int c = -1; (c + j < cols) && (c < 2); ++c) {if (c + j < 0) continue;if (state[r + i][c + j]) ++bombCount;}}if (bombCount > 0) {click[i][j] = 2;label[i][j].setText(String.valueOf(bombCount));}}}}/* 绘制按钮 */private void randomBtn() {for (int i = 0; i < rows; ++i) {for (int j = 0; j < cols; ++j) {Btn btn = new Btn();btn.i = i;btn.j = j;btn.setBounds(j * BLOCKWIDTH, i * BLOCKHEIGHT, BLOCKWIDTH, BLOCKHEIGHT);this.add(btn);btns[i][j] = btn;btn.addMouseListener(new MouseAdapter() {public void mouseClicked(MouseEvent e) {/* 左键点击 */if(e.getButton() == MouseEvent.BUTTON1) open(btn);/* 右键点击 */if(e.getButton() == MouseEvent.BUTTON3) placeFlag(btn);}});}}}/* 打开这个雷区 */private void open(Btn b){/* 踩雷 */if(state[b.i][b.j]){for (int r = 0;r < rows;++r){for(int c = 0;c < cols; ++c){btns[r][c].setVisible(false);/* 隐藏label */label[r][c].setVisible(true);/* 显示按钮(这里只有隐藏了按钮才能显示按钮下面的label) */}}JOptionPane.showMessageDialog(null,"您失败了","游戏结束",JOptionPane.PLAIN_MESSAGE);}else /* 没有踩雷 */{subopen(b);}}/* 递归打开周边雷区 */private void subopen(Btn b){/* 有雷,不能打开 */if(state[b.i][b.j]) return;/* 打开过的和插旗的,不用打开 */if(click[b.i][b.j] == 1 || click[b.i][b.j] == 3) return;/* 周围有雷的,只打开它 */if(click[b.i][b.j] == 2) {b.setVisible(false);label[b.i][b.j].setVisible(true);click[b.i][b.j] = 1;return;}/* 打开当前这个按钮 */b.setVisible(false);label[b.i][b.j].setVisible(true);click[b.i][b.j] = 1;/* 递归检测周边八个按钮 */for (int r = -1; (r + b.i < rows) && (r < 2); ++r) {if (r + b.i < 0) continue;for (int c = -1; (c + b.j < cols) && (c < 2); ++c) {if (c + b.j < 0) continue;if (r==0 && c==0) continue;Btn newbtn = btns[r + b.i][c + b.j];subopen(newbtn);}}}/* 插旗 */private void placeFlag(Btn b){/* 只能插和地雷数相同数目的旗子 */if(flagNum>0){/* 插过旗的,再点一次取消 */if(click[b.i][b.j] == 3){if(label[b.i][b.j].getText() == "[0-9]") click[b.i][b.j] = 2;else click[b.i][b.j] = 0;b.setIcon(lucency);++ flagNum;MineClearance.setMineNum(flagNum);}else /* 未插旗的,插旗 */{b.setIcon(flag);click[b.i][b.j] = 3;-- flagNum;MineClearance.setMineNum(flagNum);}/* 把所有旗子插完了,检测是否成功 */if(flagNum == 0){boolean flagstate = true;for(int i = 0;i < rows; ++i){for(int j = 0;j < cols; ++j){if (click[i][j] != 3 && state[i][j]) flagstate = false;}}if(flagstate) JOptionPane.showMessageDialog(null,"您成功了","游戏结束",JOptionPane.PLAIN_MESSAGE);}}else /* 旗子用完了,不能插 */{JOptionPane.showMessageDialog(null,"标记已用尽","错误操作",JOptionPane.PLAIN_MESSAGE);}}/* 显示雷区 */public void showBomb(){for (int r = 0;r < rows;++r){for(int c = 0;c < cols; ++c){btns[r][c].setVisible(false);/* 隐藏label */label[r][c].setVisible(true);/* 显示按钮(这里只有隐藏了按钮才能显示按钮下面的label) */}}}
}class Btn extends JButton{public int i,j;
}
需要用到的素材:
bomb.jpg -- 用于显示炸弹
face.jpg -- 顶部中间那个酷酷的重置按钮
flag.jpg -- 插的旗子
luncecy.png -- 你什么都看不到?那就对了,这是张纯透明的图片,用于再次右键有旗子的按钮时把旗子替换成透明的