Java 实现2048游戏之详细教程

一、整体项目结构

使用Maven来管理项目结构

 

二、基本功能实现

（一）创建游戏窗口（静态）

package com.baidu.czy;

import java.applet.Applet;
import java.applet.AudioClip;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.io.File;
import java.net.URI;
import java.net.URL;

import javax.swing.*;

//本类继承自JFrame，创建游戏窗口，只需要new本类对象
public class GameStart extends JFrame  {

    File f;
    URI uri;
    URL url;
    private ActionEvent e;

    //  添加背景音乐
    public GameStart() {    
        try {
            f = new File("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\bg1.wav");
            uri = f.toURI();
            url = uri.toURL();  //解析地址
            AudioClip aau;
            aau = Applet.newAudioClip(url);
            aau.loop();  //循环播放
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    private static final long serialVersionUID = 1L;

    //用于存放数据的二维数组,构成4*4网格的游戏界面数值，数组中的值就是其对应位置方格的值，0代表无值
    private int Numbers[][] = new int[4][4];

    public void init() {
        this.setTitle("2048游戏");
        this.setLocation(450, 100);
        this.setSize(800, 600);
        //自定义，不使用面板布局格式
        this.setLayout(null);


        //添加标签
        JLabel jLabel = new JLabel("欢迎来到2048游戏！");
        jLabel.setFont(new Font("华文行楷", Font.CENTER_BASELINE, 40));
        jLabel.setForeground(new Color(0X0000FF));
        jLabel.setBounds(20, 500, 400, 50);
        this.add(jLabel);

        //添加图片1（ Public ImageIcon(String filename)//参数可以是绝对路径也可以是相对路径 ）
        JLabel jLabel1 = new JLabel(new ImageIcon("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\c.png"));
        jLabel1.setBounds(400, 5, 400, 600);
        this.add(jLabel1);

        //添加图片2
        JLabel jLabel13 = new JLabel(new ImageIcon("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\d.png"));
        jLabel13.setBounds(1, 80, 400, 600);
        this.add(jLabel13);


        // 开始游戏按钮
        ImageIcon imgicon = new ImageIcon("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\start.png");
        JButton start = new JButton(imgicon);
        start.setFocusable(false);//设置此按钮不可获取焦点
        start.setBorderPainted(false);//设置此按钮没有边框
        start.setFocusPainted(false);//设置不绘制边框，设置 paintFocus属性，对于要绘制的焦点状态，该属性必须为 true。paintFocus 属性的默认值为 true。一些外观没有绘制焦点状态；它们将忽略此属性
        start.setContentAreaFilled(false);//设置不绘制边框，设置 contentAreaFilled 属性。如果该属性为 true，则按钮将绘制内容区域。如果希望有一个透明的按钮，比如只是一个图标的按钮，那么应该将此属性设置为 false。不要调用 setOpaque(false)。contentAreaFilled 属性的默认值为 true。
        start.setBounds(5, 10, 120, 30);// 设置按钮的x，y坐标位置和宽度与高度
        this.add(start);

        //后退一步按钮
        ImageIcon backicon = new ImageIcon("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\backicon.png");
        JButton back = new JButton(backicon);
        back.setFocusable(false);
        back.setBorderPainted(false);
        back.setFocusPainted(false);
        back.setContentAreaFilled(false);
        back.setBounds(270, 10, 120, 30);// 设置按钮的x，y坐标位置和宽度与高度
        this.add(back);

        // 关于按钮
        ImageIcon imgicon2 = new ImageIcon("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\about.png");
        JButton about = new JButton(imgicon2);
        about.setFocusable(false);
        about.setBorderPainted(false);
        about.setFocusPainted(false);
        about.setContentAreaFilled(false);
        about.setBounds(160, 10, 70, 30);
        this.add(about);

        // 分数显示
        JLabel scoreLabel = new JLabel("分数：0");
        scoreLabel.setBounds(5, 45, 120, 30);
        scoreLabel.setFont(new Font("幼圆", Font.CENTER_BASELINE, 18));
        scoreLabel.setForeground(new Color(0x000000));
        this.add(scoreLabel);

        //静音按钮
        JCheckBox isSoundBox = new JCheckBox("静音");
        isSoundBox.setBounds(320, 45, 120, 30);
        isSoundBox.setFont(new Font("黑体", Font.CENTER_BASELINE, 18));
        isSoundBox.setFocusable(false);
        isSoundBox.setBorderPainted(false);
        isSoundBox.setFocusPainted(false);
        isSoundBox.setContentAreaFilled(false);
        this.add(isSoundBox);


        this.setDefaultCloseOperation(EXIT_ON_CLOSE);//使用 System exit 方法退出应用程序。仅在应用程序中使用。
        this.setResizable(false); //设置此窗体是否可由用户调整大小。
        this.setVisible(true);// 显示界面

        // 创建事件处理类,将事件源绑定监听器
        ComponentListener cl = new ComponentListener(this, Numbers, scoreLabel, start, about, back, isSoundBox);
        start.addActionListener(cl);
        about.addActionListener(cl);
        back.addActionListener(cl);
        isSoundBox.addActionListener(cl);
        this.addKeyListener(cl);
    }

    // 重写窗体
    @Override
    //paint是Java中AWT画图方法
    public void paint(Graphics g) {
        //调用父类的构造方法
        super.paint(g);
        //设置画笔颜色
        g.setColor(new Color(0x66FF66));
        //填充整个4*4圆角矩形区域，使用当前颜色填充指定的圆角矩形
        g.fillRoundRect(15, 110, 370, 370, 15, 15);// 大矩形框

        g.setColor(new Color(0xFFFAFA));
        for (int i = 0; i < 4; i++) {
            for (int j = 0; j < 4; j++) {
                //填充每一个4*4小方格区域
                g.fillRoundRect(25 + i * 90, 120 + j * 90, 80, 80, 15, 15);// 小矩形框
            }
        }

        // 调整数字的位置并上色
        for (int i = 0; i < 4; i++) {
            for (int j = 0; j < 4; j++) {
                //如果小方格上数字不为0，则说明有值，进行绘制背景色与数字
                if (Numbers[j][i] != 0) {
                    int FontSize = 30;
                    int MoveX = 0, MoveY = 0;
                    switch (Numbers[j][i]) {
                        case 2:
                            g.setColor(new Color(0xFF0000));
                            FontSize = 30;
                            MoveX = 0;
                            MoveY = 0;
                            break;
                        case 4:
                            g.setColor(new Color(0xede0c8));
                            FontSize = 30;
                            MoveX = 0;
                            MoveY = 0;
                            break;
                        case 8:
                            g.setColor(new Color(0xf2b179));
                            FontSize = 30;
                            MoveX = 0;
                            MoveY = 0;
                            break;
                        case 16:
                            g.setColor(new Color(0xf59563));
                            FontSize = 29;
                            MoveX = -5;
                            MoveY = 0;
                            break;
                        case 32:
                            g.setColor(new Color(0xf67c5f));
                            FontSize = 29;
                            MoveX = -5;
                            MoveY = 0;
                            break;
                        case 64:
                            g.setColor(new Color(0xf65e3b));
                            FontSize = 29;
                            MoveX = -5;
                            MoveY = 0;
                            break;
                        case 128:
                            g.setColor(new Color(0xedcf72));
                            FontSize = 28;
                            MoveX = -10;
                            MoveY = 0;
                            break;
                        case 256:
                            g.setColor(new Color(0xedcc61));
                            FontSize = 28;
                            MoveX = -10;
                            MoveY = 0;
                            break;
                        case 512:
                            g.setColor(new Color(0xedc850));
                            FontSize = 28;
                            MoveX = -10;
                            MoveY = 0;
                            break;
                        case 1024:
                            g.setColor(new Color(0xedc53f));
                            FontSize = 27;
                            MoveX = -15;
                            MoveY = 0;
                            break;
                        case 2048:
                            g.setColor(new Color(0xedc22e));
                            FontSize = 27;
                            MoveX = -15;
                            MoveY = 0;
                            break;
                        default:
                            g.setColor(new Color(0x000000));
                            break;
                    }
                    //数字不为0的小方格覆盖原色，根据不同的值上不同的色
                    g.fillRoundRect(25 + i * 90, 120 + j * 90, 80, 80, 15, 15);// 小矩形框覆盖上色
                    g.setColor(new Color(0x000000));
                    g.setFont(new Font("Kristen ITC", Font.PLAIN, FontSize));
                    //绘制字符串,参数分别为：要绘制的字符串，字符串绘制的x坐标，y坐标
                    g.drawString(Numbers[j][i] + "", 25 + i * 90 + 30 + MoveX,
                            120 + j * 90 + 50 + MoveY);
                }
            }
        }
    }


}

（二）实现监听（具体功能的实现）

package com.baidu.czy;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.Arrays;
import java.util.Random;
import javax.swing.*;


public class ComponentListener extends KeyAdapter implements ActionListener {


    private GameStart UI;// 界面对象
    private int Numbers[][];// 存放数据的数组
    private Random rand = new Random();
    private int BackUp[][] = new int[4][4];//用于备份数组，供回退时使用
    private int BackUp2[][] = new int[4][4];//用于备份数组，供起死回生时使用
    public JLabel lb;   //分数标签
    int score = 0;
    int tempscore, tempscore2;//记录回退的分数值
    public JButton bt, about, back;
    public JCheckBox isSoundBox;
    //是否胜利,true:胜利，false：失败
    private boolean isWin = false;
    //是否复活，true：使用复活，false:不使用复活
    private boolean relive = false;
    //是否可以回退，true：不可回退，false：可以回退  (是否已经进行过一次回退了)
    private boolean hasBack = false;
    //是否播放音乐，true:播放音效，false：不播放音效
    private boolean isSound = true;
    //事件
    private ActionEvent e;



    public ComponentListener(GameStart UI, int[][] Numbers, JLabel lb, JButton bt, JButton about, JButton back, JCheckBox isSoundBox) {
        this.UI = UI;
        this.Numbers = Numbers;
        this.lb = lb;
        this.bt = bt;
        this.about = about;
        this.back = back;
        this.isSoundBox = isSoundBox;
    }

   @Override
   public void actionPerformed(ActionEvent e) {
          if (e.getSource() == bt ) {
              //游戏开始
              isWin = false;
              //各个小格赋初值0
              for (int i = 0; i < 4; i++)
                  for (int j = 0; j < 4; j++)
                      Numbers[i][j] = 0;
                      //游戏开始，分数为0
                      score = 0;
                      lb.setText("分数：" + score);
                      //生成4个0-3之间的随机数
                      int r1 = rand.nextInt(4);
                      int r2 = rand.nextInt(4);
                      int c1 = rand.nextInt(4);
                      int c2 = rand.nextInt(4);
                      //由r1,c1;r2,c2组成两个初始值，所以初始值的坐标不能重复
                      while (r1 == r2 && c1 == c2) {
                          r2 = rand.nextInt(4);
                          c2 = rand.nextInt(4);
                      }
                      // 生成初始数字（2或者4）
                      int value1 = rand.nextInt(2) * 2 + 2;
                      int value2 = rand.nextInt(2) * 2 + 2;

                      // 把数字存进对应的位置
                      Numbers[r1][c1] = value1;
                      Numbers[r2][c2] = value2;
                      //数字更改，重新绘制图形，为此组件创建图形上下文
                      UI.paint(UI.getGraphics());




        } else if (e.getSource() == about) {
            //点击了关于标签
            JOptionPane.showMessageDialog(UI, "游戏规则：
"
                    + "1、开始时棋盘内随机出现两个数字，出现的数字仅可能为2或4
"
                    + "2、玩家可以选择上下左右四个方向，若棋盘内的数字出现位移或合并，视为有效移动
"
                    + "3、玩家选择的方向上若有相同的数字则合并，每次有效移动可以同时合并，但不可以连续合并
"
                    + "4、合并所得的所有新生成数字相加即为该步的有效得分
"
                    + "5、玩家选择的方向行或列前方有空格则出现位移
"
                    + "6、每有效移动一步，棋盘的空位(无数字处)随机出现一个数字(依然可能为2或4)
"
                    + "7、棋盘被数字填满，无法进行有效移动，判负，游戏结束
"
                    + "8、棋盘上出现2048，判胜，游戏结束。
"
            );
        } else if (e.getSource() == back && hasBack == false) {
            System.out.println("回退");
            //点击了回退一步标签，而且只能回退一次，只有再执行一次上下左右操作才可以再次回退
            hasBack = true;
            //判断本次回退是回退上一步，还是复活，回退上上步
            if (relive == false) {
                //替换上一步的分数
                score = tempscore;
                lb.setText("分数：" + score);
                for (int i = 0; i < BackUp.length; i++) {
                    Numbers[i] = Arrays.copyOf(BackUp[i], BackUp[i].length);
                }
            } else {
                //选择了起死回生
                score = tempscore2;
                lb.setText("分数：" + score);
                for (int i = 0; i < BackUp2.length; i++) {
                    Numbers[i] = Arrays.copyOf(BackUp2[i], BackUp2[i].length);
                }
                //再给一次复活的机会
                relive = false;
            }
            //重新绘制
            UI.paint(UI.getGraphics());
        } else if (e.getSource().equals(isSoundBox)) {
            //是否选中静音复选框
            if (isSoundBox.isSelected()) {
                isSound = false;
            } else {
                isSound = true;
            }
        }
    }




    // 键盘监听，监听游戏焦点的←，↑，→，↓;方向键键值：左：37上：38右：39下：40
    public void keyPressed(KeyEvent event) {

        int Counter = 0;// 记录数字有效移动位数，判断是否移动了
        int NumCounter = 0;// 记录当前有数字的小方格数量，判断是否已满
        int NumNearCounter = 0;// 记录相邻格子数字相同的对数

        hasBack = false;
        //每次进行真正的移位合并操作之前，记录前一步

        //记录上上步
        if (BackUp != null || BackUp.length != 0) {
            tempscore2 = tempscore;// 先把分数备份好
            // 下面的for循环调用java.util.Arrays.copyOf()方法复制数组，实现备份
            for (int i = 0; i < BackUp.length; i++) {
                BackUp2[i] = Arrays.copyOf(BackUp[i], BackUp[i].length);
            }
        }
        //记录上步
        tempscore = score;// 先把分数备份好
        // 下面的for循环调用java.util.Arrays.copyOf()方法复制数组，实现备份
        for (int i = 0; i < Numbers.length; i++) {
            BackUp[i] = Arrays.copyOf(Numbers[i], Numbers[i].length);
        }

        if (isWin == false) {
            switch (event.getKeyCode()) {

                case 37:
                    // 向左移动
                    /*
                    （1）在移动的过程中，判断与其相邻的格子，如果相邻的格子为空，则移动，并将当前的格子清0
                    （2）移动后，若格子相邻并且数值相等，则求和并且清0
                     */
                    if (isSound == true) {
                        new PlaySound("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\move.wav").start();// 播放移位音乐
                    }
                    //经过这个循环，把每行有值的格子，都被搬到最左边了，同一行右侧有值的格子，覆盖左侧值为0的格子
                    for (int h = 0; h < 4; h++)
                        for (int l = 0; l < 4; l++)
                            if (Numbers[h][l] != 0) {
                                int temp = Numbers[h][l];
                                //per相当于是相邻位置
                                int pre = l - 1;
                                while (pre >= 0 && Numbers[h][pre] == 0) {
                                    Numbers[h][pre] = temp;
                                    //移动后清0
                                    Numbers[h][pre + 1] = 0;
                                    pre--;
                                    Counter++;
                                }
                            }
                    //表盘当前左侧相邻相等的值会相加，造成左边值为【和】，相邻右边值为【0】
                    for (int h = 0; h < 4; h++)
                        for (int l = 0; l < 4; l++)
                            if (l + 1 < 4
                                    && (Numbers[h][l] == Numbers[h][l + 1])     //相邻两列数值相加，并要求两列不同时为0
                                    && (Numbers[h][l] != 0 || Numbers[h][l + 1] != 0)) {
                                if (isSound == true)
                                    new PlaySound("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\merge.wav").start();
                                //数值合并
                                Numbers[h][l] = Numbers[h][l] + Numbers[h][l + 1];
                                Numbers[h][l + 1] = 0;
                                Counter++;
                                score += Numbers[h][l];
                                if (Numbers[h][l] == 2048) {
                                    isWin = true;
                                }
                            }
                    //经过这个循环，把每行有值的格子，都被搬到最左边了，同一行右侧有值的格子，覆盖左侧值为0的格子
                    for (int h = 0; h < 4; h++)
                        for (int l = 0; l < 4; l++)
                            if (Numbers[h][l] != 0) {
                                int temp = Numbers[h][l];
                                int pre = l - 1;
                                while (pre >= 0 && Numbers[h][pre] == 0) {
                                    Numbers[h][pre] = temp;
                                    Numbers[h][pre + 1] = 0;
                                    pre--;
                                    Counter++;
                                }
                            }
                    break;

                case 39:// 向右移动
                    if (isSound == true)
                        new PlaySound("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\move.wav").start();
                    for (int h = 3; h >= 0; h--)
                        for (int l = 3; l >= 0; l--)
                            if (Numbers[h][l] != 0) {
                                int temp = Numbers[h][l];
                                int pre = l + 1;
                                while (pre <= 3 && Numbers[h][pre] == 0) {
                                    Numbers[h][pre] = temp;
                                    Numbers[h][pre - 1] = 0;
                                    pre++;
                                    Counter++;
                                }
                            }

                    for (int h = 3; h >= 0; h--)
                        for (int l = 3; l >= 0; l--)
                            if (l + 1 < 4
                                    && (Numbers[h][l] == Numbers[h][l + 1])
                                    && (Numbers[h][l] != 0 || Numbers[h][l + 1] != 0)) {
                                if (isSound == true)
                                    new PlaySound("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\merge.wav").start();
                                Numbers[h][l + 1] = Numbers[h][l]
                                        + Numbers[h][l + 1];
                                Numbers[h][l] = 0;
                                Counter++;
                                score += Numbers[h][l + 1];
                                if (Numbers[h][l + 1] == 2048) {
                                    isWin = true;
                                }
                            }
                    for (int h = 3; h >= 0; h--)
                        for (int l = 3; l >= 0; l--)
                            if (Numbers[h][l] != 0) {
                                int temp = Numbers[h][l];
                                int pre = l + 1;
                                while (pre <= 3 && Numbers[h][pre] == 0) {
                                    Numbers[h][pre] = temp;
                                    Numbers[h][pre - 1] = 0;
                                    pre++;
                                    Counter++;
                                }
                            }
                    break;

                case 38:
                    // 向上移动
                    if (isSound == true)
                        new PlaySound("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\move.wav").start();
                    for (int l = 0; l < 4; l++)
                        for (int h = 0; h < 4; h++)
                            if (Numbers[h][l] != 0) {
                                int temp = Numbers[h][l];
                                int pre = h - 1;
                                while (pre >= 0 && Numbers[pre][l] == 0) {
                                    Numbers[pre][l] = temp;
                                    Numbers[pre + 1][l] = 0;
                                    pre--;
                                    Counter++;
                                }
                            }
                    for (int l = 0; l < 4; l++)
                        for (int h = 0; h < 4; h++)
                            if (h + 1 < 4
                                    && (Numbers[h][l] == Numbers[h + 1][l])
                                    && (Numbers[h][l] != 0 || Numbers[h + 1][l] != 0)) {
                                if (isSound == true)
                                    new PlaySound("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\merge.wav").start();
                                Numbers[h][l] = Numbers[h][l] + Numbers[h + 1][l];
                                Numbers[h + 1][l] = 0;
                                Counter++;
                                score += Numbers[h][l];
                                if (Numbers[h][l] == 2048) {
                                    isWin = true;
                                }
                            }

                    for (int l = 0; l < 4; l++)
                        for (int h = 0; h < 4; h++)
                            if (Numbers[h][l] != 0) {
                                int temp = Numbers[h][l];
                                int pre = h - 1;
                                while (pre >= 0 && Numbers[pre][l] == 0) {
                                    Numbers[pre][l] = temp;
                                    Numbers[pre + 1][l] = 0;
                                    pre--;
                                    Counter++;
                                }
                            }
                    break;

                case 40:
                    // 向下移动
                    if (isSound == true)
                        new PlaySound("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\move.wav").start();
                    for (int l = 3; l >= 0; l--)
                        for (int h = 3; h >= 0; h--)
                            if (Numbers[h][l] != 0) {
                                int temp = Numbers[h][l];
                                int pre = h + 1;
                                while (pre <= 3 && Numbers[pre][l] == 0) {
                                    Numbers[pre][l] = temp;
                                    Numbers[pre - 1][l] = 0;
                                    pre++;
                                    Counter++;
                                }
                            }
                    for (int l = 3; l >= 0; l--)
                        for (int h = 3; h >= 0; h--)
                            if (h + 1 < 4
                                    && (Numbers[h][l] == Numbers[h + 1][l])
                                    && (Numbers[h][l] != 0 || Numbers[h + 1][l] != 0)) {
                                if (isSound == true)
                                    new PlaySound("E:\JavaProject\HandleGame2048(2)\src\main\resources\res\merge.wav").start();
                                Numbers[h + 1][l] = Numbers[h][l]
                                        + Numbers[h + 1][l];
                                Numbers[h][l] = 0;
                                Counter++;
                                score += Numbers[h + 1][l];
                                if (Numbers[h + 1][l] == 2048) {
                                    isWin = true;
                                }
                            }

                    for (int l = 3; l >= 0; l--)
                        for (int h = 3; h >= 0; h--)
                            if (Numbers[h][l] != 0) {
                                int temp = Numbers[h][l];
                                int pre = h + 1;
                                while (pre <= 3 && Numbers[pre][l] == 0) {
                                    Numbers[pre][l] = temp;
                                    Numbers[pre - 1][l] = 0;
                                    pre++;
                                    Counter++;
                                }
                            }
                    break;

            }
            //移位，合并，移位完成后，判断是否有可重复值
            for (int i = 0; i < 3; i++) {
                for (int j = 0; j < 3; j++) {
                    //判断相邻左右位置有没有重复值
                    if (Numbers[i][j] == Numbers[i][j + 1]
                            && Numbers[i][j] != 0) {
                        NumNearCounter++;
                    }
                    //判断相邻上下位置有没有重复值
                    if (Numbers[i][j] == Numbers[i + 1][j]
                            && Numbers[i][j] != 0) {
                        NumNearCounter++;
                    }
                    if (Numbers[3][j] == Numbers[3][j + 1]//第四行只需要判断是否与右边有重复
                            && Numbers[3][j] != 0) {
                        NumNearCounter++;
                    }
                    if (Numbers[i][3] == Numbers[i + 1][3]//第四列只需要判断与下边是否有重复
                            && Numbers[i][3] != 0) {
                        NumNearCounter++;
                    }
                }
            }
            //判断不为0的空余格子数
            for (int i = 0; i < 4; i++) {
                for (int j = 0; j < 4; j++) {
                    if (Numbers[i][j] != 0) {
                        NumCounter++;
                    }
                }
            }
            System.out.println(Counter);

            //有效移位数>0，则补充一个新的2或者4
            if (Counter > 0) {
                lb.setText("分数：" + score);
                //随机产生0~3的数字，选中位置
                int r1 = rand.nextInt(4);
                int c1 = rand.nextInt(4);
                while (Numbers[r1][c1] != 0) {
                    r1 = rand.nextInt(4);
                    c1 = rand.nextInt(4);
                }
                //产生2或4
                int value1 = rand.nextInt(2) * 2 + 2;
                Numbers[r1][c1] = value1;
            }

            if (isWin == true) {
                UI.paint(UI.getGraphics());
                JOptionPane.showMessageDialog(UI, "恭喜你赢了!
您的最终得分为：" + score);
            }

            if (NumCounter == 16 && NumNearCounter == 0) {
                //移动后满格并且没有可合并的小格子，游戏结束relive:复活一次
                relive = true;
                JOptionPane.showMessageDialog(UI, "没地方可以合并咯!!"
                        + "
很遗憾，您输了~>_<~" + "
悄悄告诉你，游戏有起死回生功能哦，不信你“退一步”试试？"
                        + "
说不定能扭转乾坤捏 （^_~）");
            }
            UI.paint(UI.getGraphics());
        }

    }

}

（三）实现线程播放音乐

package com.baidu.czy;


import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.SourceDataLine;



//播放声音的线程
public class PlaySound extends Thread {
    private String filename;


    public PlaySound(String wavfile) {

        filename = "" + wavfile;
    }
    public void run() {
        File soundFile = new File(filename);
        AudioInputStream audioInputStream = null;
        try {
            //获得音频输入流
            audioInputStream = AudioSystem.getAudioInputStream(soundFile);
        } catch (Exception e1) {
            e1.printStackTrace();
            return;
        }
        //指定声音流中特定数据安排
        AudioFormat format = audioInputStream.getFormat();
        SourceDataLine auline = null;
        DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
        try {
            //从混频器获得源数据行
            auline = (SourceDataLine) AudioSystem.getLine(info);
            //打开具有指定格式的行，这样可使行获得所有所需的系统资源并变得可操作。
            auline.open(format);
        } catch (Exception e) {
            e.printStackTrace();
            return;
        }
        //允许数据行执行数据 I/O
        auline.start();
        int nBytesRead = 0;
        // 这是缓冲
        byte[] abData = new byte[512];
        try {
            while (nBytesRead != -1) {
                //从音频流读取指定的最大数量的数据字节，并将其放入给定的字节数组中
                nBytesRead = audioInputStream.read(abData, 0, abData.length);
                if (nBytesRead >= 0)
                    //通过此源数据行将音频数据写入混频器
                    auline.write(abData, 0, nBytesRead);
            }
        } catch (IOException e) {
            e.printStackTrace();
            return;
        } finally {
            auline.drain();
            auline.close();
        }
    }
}

（四）测试类

package com.baidu.czy.test;

import com.baidu.czy.GameStart;

public class StartGameTest {
    public static void main(String[] args) {
         GameStart view = new GameStart();
         view.init();
         new GameStart();

    }
}

 三、运行结果