Java图形与事件处理，应用键盘事件，编写一个“拼图”游戏程序。

好的，下面是一个简单的拼图游戏程序示例：

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

public class PuzzleGame extends JFrame implements ActionListener {
    private JButton[][] puzzleButtons;
    private JButton newGameButton;
    private JPanel puzzlePanel, controlPanel;
    private int emptyRow, emptyCol;

    public PuzzleGame() {
        setTitle("Puzzle Game");
        setSize(400, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());

        // 创建拼图面板
        puzzlePanel = new JPanel(new GridLayout(4, 4));
        puzzleButtons = new JButton[4][4];
        for (int row = 0; row < 4; row++) {
            for (int col = 0; col < 4; col++) {
                puzzleButtons[row][col] = new JButton("" + (row * 4 + col + 1));
                puzzlePanel.add(puzzleButtons[row][col]);
                puzzleButtons[row][col].addActionListener(this);
            }
        }
        emptyRow = 3;
        emptyCol = 3;
        puzzleButtons[emptyRow][emptyCol].setVisible(false);
        add(puzzlePanel, BorderLayout.CENTER);

        // 创建控制面板
        controlPanel = new JPanel(new FlowLayout());
        newGameButton = new JButton("New Game");
        newGameButton.addActionListener(this);
        controlPanel.add(newGameButton);
        add(controlPanel, BorderLayout.SOUTH);

        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        // 点击拼图按钮
        for (int row = 0; row < 4; row++) {
            for (int col = 0; col < 4; col++) {
                if (e.getSource() == puzzleButtons[row][col]) {
                    if ((row == emptyRow && Math.abs(col - emptyCol) == 1) ||
                            (col == emptyCol && Math.abs(row - emptyRow) == 1)) {
                        // 移动拼图
                        puzzleButtons[emptyRow][emptyCol].setText(puzzleButtons[row][col].getText());
                        puzzleButtons[row][col].setVisible(false);
                        puzzleButtons[emptyRow][emptyCol].setVisible(true);
                        emptyRow = row;
                        emptyCol = col;
                    }
                }
            }
        }

        // 点击新游戏按钮
        if (e.getSource() == newGameButton) {
            shufflePuzzle();
        }
    }

    // 洗牌拼图
    private void shufflePuzzle() {
        for (int i = 0; i < 100; i++) {
            int random = (int)(Math.random() * 4);
            int row = emptyRow, col = emptyCol;
            if (random == 0 && emptyRow > 0) {
                row--;
            } else if (random == 1 && emptyRow < 3) {
                row++;
            } else if (random == 2 && emptyCol > 0) {
                col--;
            } else if (random == 3 && emptyCol < 3) {
                col++;
            }
            if (row != emptyRow || col != emptyCol) {
                puzzleButtons[emptyRow][emptyCol].setText(puzzleButtons[row][col].getText());
                puzzleButtons[row][col].setVisible(false);
                puzzleButtons[emptyRow][emptyCol].setVisible(true);
                emptyRow = row;
                emptyCol = col;
            }
        }
    }

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

这个程序创建了一个4x4的拼图面板，每个拼图按钮上面有一个数字。点击拼图按钮会把它与空白按钮交换位置，从而移动拼图。点击“New Game”按钮会洗牌拼图。