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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：
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] == 4) 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