Java语言实现扫雷游戏（2）

import javax.swing.JButton;
 
public class MyButton extends JButton {
 private static final long serialVersionUID = 1L;
 protected int row;
 protected int col;
}

// 初始化按钮,将JLabel覆盖住
 private void initButtons() {
 // 循环生成按钮
 for (int i = 0; i < rows; i++) {
 for (int j = 0; j < cols; j++) {
 MyButton btn = new MyButton();
 // 根据JLabel大小设置按钮的大小边界
 btn.setBounds(j * BLOCKWIDTH, i * BLOCKHEIGHT, BLOCKWIDTH, BLOCKHEIGHT);
 this.add(btn);
 // 将按钮存在类变量中(当然,实际上存的是对象的引用地址)
 buttons[i][j] = btn;
 btn.row = i;
 btn.col = j;
 // 给按钮添加监听器,注册点击事件
 // (单机按钮时,将执行内部类ActionListener()中的actionPerformed(ActionEvent e)方法)
 btn.addActionListener(new ActionListener() {
 
 @Override
 public void actionPerformed(ActionEvent e) {
 // TODO Auto-generated method stub
 
 }});
 }
 }
 }

private final int[][] offset = {{-1, -1}, {0, -1}, {1, -1}, {1, 0}, {1, 1}, {0, 1}, {-1, 1}, {-1, 0}};

// 判断位置是否越界
 private boolean verify(int row, int col) {
 return row >= 0 && row < this.rows && col >= 0 && col < this.cols;
 }

// 单击按钮时打开或成片打开
 private void open(MyButton btn) {
 // 先将当期按钮设置为不可见,即打开了按钮
 btn.setVisible(false);
 // 判断按钮中 是否为数字还是空
 switch (labels[btn.row][btn.col].getText()) {
 // 如果是炸弹则将全部按钮都打开,游戏结束
 case "*" :
 for (int i = 0; i < rows; i++) {
 for (int j = 0; j < cols; j++) {
 buttons[i][j].setVisible(false);
 }
 }
 break;
 // 如果是空的则将他周围空的按钮都打开,进入递归
 case "" :
 for (int[] off: offset) {
 int newRow = btn.row + off[0];
 int newCol = btn.col + off[1];
 if (verify(newRow, newCol)) {
 MyButton sButton = buttons[newRow][newCol];
 if (sButton.isVisible()) {
 open(sButton);
 }
 }
 }
 default:
 }
 }

btn.addActionListener(new ActionListener() {
 
 @Override
 public void actionPerformed(ActionEvent e) {
 // TODO Auto-generated method stub
 open((MyButton) e.getSource());
 }});