今天借鉴网上写了一个扫雷游戏

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Random;
public class SaoLei implements MouseListener,ActionListener {
    JPanel p=new JPanel();
    JFrame frame=new JFrame("扫雷");
    @SuppressWarnings("rawtypes")
    JComboBox combobox=new JComboBox();
    JButton reset=new JButton("重新开始");
    Container container=new Container();
    SaoLeiConstant constant=new SaoLeiConstant();
    JButton[][] buttons=new JButton[constant.row][constant.col];//按钮
    int[][] counts=new int[constant.row][constant.col];
    public SaoLei(){//构造
        frame.setSize(600,700);
        frame.setResizable(false);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new BorderLayout());
        addtopButton();//选择
        addButtons();
        addLei();//加雷
        calcNeiboLei();//雷数
        frame.setVisible(true);
    }
    void addtopButton() {
        p.removeAll();
        p.add(reset);
        reset.setBackground(Color.green);
        reset.setOpaque(true);
        reset.addActionListener(this);
        //combobox.addItem("选择难度");
        combobox.addItem("新手难度");
        combobox.addItem("初级难度");
        combobox.addItem("中级难度");
        combobox.addItem("高级难度");
        combobox.addItem("大师难度");
        combobox.setBackground(Color.GREEN);
        combobox.setOpaque(true);
        combobox.addItemListener(new ItemListener() {

            @Override
            public void itemStateChanged(ItemEvent e) {
                String item = e.getItem().toString();
                if (item == "新手难度") {
                    constant.leiCount = 20;
                    ResetGame();
                } else if (item == "初级难度") {
                    constant.leiCount = 43;
                    ResetGame();
                } else if (item == "中级难度") {
                    constant.leiCount = 63;
                    ResetGame();
                } else if (item == "高级难度") {
                    constant.leiCount = 99;
                    ResetGame();
                } else if (item == "大师难度") {
                    constant.leiCount = 119;
                    ResetGame();
                }

            }

        });
        p.add(combobox);
        frame.add(p, BorderLayout.NORTH);
    }

    void addLei() {
        Random rand = new Random();
        int randRow,randCol;
        for(int i=0; i<constant.leiCount; i++) {
            randRow = rand.nextInt(constant.row);
            randCol = rand.nextInt(constant.col);
            if(counts[randRow][randCol] == constant.LEICODE) {
                i--;
            } else {
                counts[randRow][randCol] = constant.LEICODE;
                //buttons[randRow][randCol].setText("X");
            }
        }
    }

    void addButtons() {
        frame.add(container,BorderLayout.CENTER);
        container.setLayout(new GridLayout(constant.row,constant.col));
        for(int i=0;i<constant.row;i++) {
            for(int j=0;j<constant.col;j++) {
                JButton button = new JButton();
                button.setBackground(Color.white);
                button.setOpaque(true);
                button.addActionListener(this);
                button.addMouseListener((MouseListener) this);
                buttons[i][j] = button;
                container.add(button);
            }
        }
    }

    void calcNeiboLei() {
        int count;
        for(int i=0;i<constant.row;i++) {
            for(int j=0;j<constant.col;j++) {
                count =0;
                if(counts[i][j] == constant.LEICODE) continue;
                if(i>0 && j>0 && counts[i-1][j-1] == constant.LEICODE) count++;
                if(i>0 && counts[i-1][j] == constant.LEICODE) count++;
                if(i>0 && j<19 &&counts[i-1][j+1] == constant.LEICODE) count++;
                if(j>0 && counts[i][j-1] == constant.LEICODE) count++;
                if(j<19 && counts[i][j+1] == constant.LEICODE) count++;
                if(i<19 && j>0 && counts[i+1][j-1] == constant.LEICODE) count++;
                if(i<19 && counts[i+1][j] == constant.LEICODE) count++;
                if(i<19 && j<19 && counts[i+1][j+1] == constant.LEICODE) count++;
                counts[i][j] = count;
                buttons[i][j].setMargin(new Insets(0,0,0,0));//让按钮随按钮上的图案变化
                //buttons[i][j].setText(counts[i][j] + "");
            }
        }
    }

    @Override
    public void actionPerformed(ActionEvent e) {

        JButton button = (JButton)e.getSource();
        if(button.equals(reset)) {
            ResetGame();//重新开始游戏
        } else {
            int count = 0;
            for(int i=0;i<constant.row;i++) {
                for(int j=0;j<constant.col;j++) {
                    if(button.equals(buttons[i][j])) {
                        count = counts[i][j];
                        if(count == constant.LEICODE) {
                            loseGame();
                        } else {
                            openCell(i,j);
                            checkWin();
                        }
                        return;
                    }
                }
            }
        }
    }
public void mouseClicked(MouseEvent e){
        JButton button=(JButton)e.getSource();
        if(e.getButton()==MouseEvent.BUTTON3){
            for(int i=0;i<constant.row;i++){
                for(int j=0;i<constant.col;j++){
                    if(button.equals(buttons[i][j])){
                        if(buttons[i][j].isEnabled()==true){
                            buttons[i][j].setMargin(new Insets(0,0,0,0));
                            buttons[j][j].setText("？");
                            return;
                        }
                    }
                }
            }
        }
    }
    void ResetGame() {
        for(int i=0;i<constant.row;i++) {
            for(int j=0;j<constant.col;j++) {
                buttons[i][j].setText("");
                buttons[i][j].setEnabled(true);
                buttons[i][j].setBackground(Color.white);
                counts[i][j] = 0;
            }
        }
        addLei();
        calcNeiboLei();
    }

    void checkWin() {
        for(int i=0;i<constant.row;i++) {
            for(int j=0;j<constant.col;j++) {
                if(buttons[i][j].isEnabled() == true && counts[i][j] != constant.LEICODE ) return;
            }
        }
        JOptionPane.showMessageDialog(frame,"Yeah,你赢了！");
    }

    //使用递归方法打开格子
    void openCell(int i, int j) {
        if(buttons[i][j].isEnabled() == false) return;
        buttons[i][j].setBackground(Color.yellow);
        buttons[i][j].setOpaque(true);
        buttons[i][j].setEnabled(false);
        if(counts[i][j] == 0) {
            if(i>0 && j>0 && counts[i-1][j-1] != constant.LEICODE) openCell(i-1,j-1);
            if(i>0 && j<19 && counts[i-1][j] != constant.LEICODE) openCell(i-1,j);
            if(i>0 && j<19 &&counts[i-1][j+1] != constant.LEICODE) openCell(i-1,j+1);
            if(j>0 && counts[i][j-1] != constant.LEICODE) openCell(i,j-1);
            if(j<19 && counts[i][j+1] != constant.LEICODE) openCell(i,j+1);
            if(i<19 && j>0 && counts[i+1][j-1] != constant.LEICODE) openCell(i+1,j-1);
            if(i<19 && counts[i+1][j] != constant.LEICODE) openCell(i+1,j);
            if(i<19 && j<19 && counts[i+1][j+1] != constant.LEICODE) openCell(i+1,j+1);
        } else {
            buttons[i][j].setMargin(new Insets(0,0,0,0));
            buttons[i][j].setText(counts[i][j] + "");
        }
    }

    void loseGame() {
        for(int i=0;i<constant.row;i++) {
            for(int j=0;j<constant.col;j++) {
                int count = counts[i][j];
                if(count == constant.LEICODE) {
                    buttons[i][j].setMargin(new Insets(0,0,0,0));
                    buttons[i][j].setText("雷");
                    buttons[i][j].setBackground(Color.red);
                    buttons[i][j].setEnabled(false);
                } else {
                    buttons[i][j].setMargin(new Insets(0,0,0,0));
                    buttons[i][j].setText(count + "");
                    buttons[i][j].setEnabled(false);

                }
            }
        }
        JOptionPane.showMessageDialog(frame,"error,你输了！");
    }

    public static void main(String[] args) {
        new SaoLei();
    }

    @Override
    public void mousePressed(MouseEvent e) {
        // TODO Auto-generated method stub

    }

    @Override
    public void mouseReleased(MouseEvent e) {
        // TODO Auto-generated method stub

    }

    @Override
    public void mouseEntered(MouseEvent e) {
        // TODO Auto-generated method stub

    }

    @Override
    public void mouseExited(MouseEvent e) {
        // TODO Auto-generated method stub

    }
}

　　初始数据定义

public class SaoLeiConstant {
    final int row=20;//行数
    final int col=20;//列数
    final int LEICODE=10;//定义雷下放的数字
    protected int temp=20;
    protected int leiCount=temp;//雷数量
}