实现2048小游戏的游戏操作设计，实现键盘监听，方向键控制数字移动java源代码

好的，以下是Java实现2048小游戏的游戏操作设计和键盘监听的示例代码：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Game2048 extends JFrame implements KeyListener {
    private static final int ROWS = 4; // 行数
    private static final int COLS = 4; // 列数
    private int[][] grid = new int[ROWS][COLS]; // 游戏棋盘
    private JLabel[][] labels = new JLabel[ROWS][COLS]; // 显示数字的标签
    private boolean gameOver = false; // 游戏是否结束

    // 构造方法
    public Game2048() {
        // 初始化游戏界面
        setTitle("2048小游戏");
        setLayout(new GridLayout(ROWS, COLS));
        setSize(400, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        addKeyListener(this);
        setFocusable(true);
        setResizable(false);
        // 初始化棋盘和标签
        for (int i = 0; i < ROWS; i++) {
            for (int j = 0; j < COLS; j++) {
                grid[i][j] = 0;
                labels[i][j] = new JLabel("", SwingConstants.CENTER);
                labels[i][j].setOpaque(true);
                labels[i][j].setBackground(Color.WHITE);
                add(labels[i][j]);
            }
        }
        // 随机生成两个数字
        generateNumber();
        generateNumber();
    }

    // 生成一个数字
    private void generateNumber() {
        // 找到空位置
        int[] empty = new int[ROWS * COLS];
        int count = 0;
        for (int i = 0; i < ROWS; i++) {
            for (int j = 0; j < COLS; j++) {
                if (grid[i][j] == 0) {
                    empty[count++] = i * COLS + j;
                }
            }
        }
        if (count == 0) {
            // 棋盘已满，游戏结束
            gameOver = true;
            return;
        }
        // 随机选择一个空位置
        int index = (int) (Math.random() * count);
        int pos = empty[index];
        int row = pos / COLS;
        int col = pos % COLS;
        // 随机生成数字
        int value = (int) (Math.random() * 2) * 2 + 2;
        grid[row][col] = value;
        labels[row][col].setText(String.valueOf(value));
        // 更新界面
        labels[row][col].setBackground(getColor(value));
    }

    // 获取数字对应的颜色
    private Color getColor(int value) {
        switch (value) {
            case 2: return new Color(0xeee4da);
            case 4: return new Color(0xede0c8);
            case 8: return new Color(0xf2b179);
            case 16: return new Color(0xf59563);
            case 32: return new Color(0xf67c5f);
            case 64: return new Color(0xf65e3b);
            case 128: return new Color(0xedcf72);
            case 256: return new Color(0xedcc61);
            case 512: return new Color(0xedc850);
            case 1024: return new Color(0xedc53f);
            case 2048: return new Color(0xedc22e);
            default: return Color.WHITE;
        }
    }

    // 判断游戏是否结束
    private boolean isGameOver() {
        if (!gameOver) {
            for (int i = 0; i < ROWS; i++) {
                for (int j = 0; j < COLS; j++) {
                    if (grid[i][j] == 0) {
                        return false;
                    }
                    if (i > 0 && grid[i][j] == grid[i - 1][j]) {
                        return false;
                    }
                    if (j > 0 && grid[i][j] == grid[i][j - 1]) {
                        return false;
                    }
                }
            }
            return true;
        }
        return false;
    }

    // 处理键盘按下事件
    public void keyPressed(KeyEvent e) {
        if (!gameOver) {
            int keyCode = e.getKeyCode();
            boolean moved = false;
            switch (keyCode) {
                case KeyEvent.VK_UP:
                    for (int j = 0; j < COLS; j++) {
                        for (int i = 1; i < ROWS; i++) {
                            if (grid[i][j] != 0) {
                                int k = i - 1;
                                while (k >= 0 && grid[k][j] == 0) {
                                    k--;
                                }
                                if (k >= 0 && grid[k][j] == grid[i][j]) {
                                    grid[k][j] *= 2;
                                    grid[i][j] = 0;
                                    labels[k][j].setText(String.valueOf(grid[k][j]));
                                    labels[i][j].setText("");
                                    labels[k][j].setBackground(getColor(grid[k][j]));
                                    moved = true;
                                } else if (k + 1 != i) {
                                    grid[k + 1][j] = grid[i][j];
                                    grid[i][j] = 0;
                                    labels[k + 1][j].setText(String.valueOf(grid[k + 1][j]));
                                    labels[i][j].setText("");
                                    labels[k + 1][j].setBackground(getColor(grid[k + 1][j]));
                                    moved = true;
                                }
                            }
                        }
                    }
                    break;
                case KeyEvent.VK_DOWN:
                    for (int j = 0; j < COLS; j++) {
                        for (int i = ROWS - 2; i >= 0; i--) {
                            if (grid[i][j] != 0) {
                                int k = i + 1;
                                while (k < ROWS && grid[k][j] == 0) {
                                    k++;
                                }
                                if (k < ROWS && grid[k][j] == grid[i][j]) {
                                    grid[k][j] *= 2;
                                    grid[i][j] = 0;
                                    labels[k][j].setText(String.valueOf(grid[k][j]));
                                    labels[i][j].setText("");
                                    labels[k][j].setBackground(getColor(grid[k][j]));
                                    moved = true;
                                } else if (k - 1 != i) {
                                    grid[k - 1][j] = grid[i][j];
                                    grid[i][j] = 0;
                                    labels[k - 1][j].setText(String.valueOf(grid[k - 1][j]));
                                    labels[i][j].setText("");
                                    labels[k - 1][j].setBackground(getColor(grid[k - 1][j]));
                                    moved = true;
                                }
                            }
                        }
                    }
                    break;
                case KeyEvent.VK_LEFT:
                    for (int i = 0; i < ROWS; i++) {
                        for (int j = 1; j < COLS; j++) {
                            if (grid[i][j] != 0) {
                                int k = j - 1;
                                while (k >= 0 && grid[i][k] == 0) {
                                    k--;
                                }
                                if (k >= 0 && grid[i][k] == grid[i][j]) {
                                    grid[i][k] *= 2;
                                    grid[i][j] = 0;
                                    labels[i][k].setText(String.valueOf(grid[i][k]));
                                    labels[i][j].setText("");
                                    labels[i][k].setBackground(getColor(grid[i][k]));
                                    moved = true;
                                } else if (k + 1 != j) {
                                    grid[i][k + 1] = grid[i][j];
                                    grid[i][j] = 0;
                                    labels[i][k + 1].setText(String.valueOf(grid[i][k + 1]));
                                    labels[i][j].setText("");
                                    labels[i][k + 1].setBackground(getColor(grid[i][k + 1]));
                                    moved = true;
                                }
                            }
                        }
                    }
                    break;
                case KeyEvent.VK_RIGHT:
                    for (int i = 0; i < ROWS; i++) {
                        for (int j = COLS - 2; j >= 0; j--) {
                            if (grid[i][j] != 0) {
                                int k = j + 1;
                                while (k < COLS && grid[i][k] == 0) {
                                    k++;
                                }
                                if (k < COLS && grid[i][k] == grid[i][j]) {
                                    grid[i][k] *= 2;
                                    grid[i][j] = 0;
                                    labels[i][k].setText(String.valueOf(grid[i][k]));
                                    labels[i][j].setText("");
                                    labels[i][k].setBackground(getColor(grid[i][k]));
                                    moved = true;
                                } else if (k - 1 != j) {
                                    grid[i][k - 1] = grid[i][j];
                                    grid[i][j] = 0;
                                    labels[i][k - 1].setText(String.valueOf(grid[i][k - 1]));
                                    labels[i][j].setText("");
                                    labels[i][k - 1].setBackground(getColor(grid[i][k - 1]));
                                    moved = true;
                                }
                            }
                        }
                    }
                    break;
                default:
                    break;
            }
            if (moved) {
                generateNumber();
                if (isGameOver()) {
                    gameOver = true;
                    JOptionPane.showMessageDialog(this, "游戏结束！");
                }
            }
        }
    }

    // 处理键盘释放事件
    public void keyReleased(KeyEvent e) {
    }

    // 处理键盘输入事件
    public void keyTyped(KeyEvent e) {
    }

    // 主方法
    public static void main(String[] args) {
        Game2048 game = new Game2048();
        game.setVisible(true);
    }
}

以上代码实现了2048小游戏的游戏操作设计和键盘监听，包括生成数字、判断游戏结束、处理键盘按下事件等功能。你可以将代码复制到Java开发工具中运行，体验一下这个小游戏。