90行java小游戏源代码

以下是一个更复杂的 Java 小游戏代码，包括了鼠标交互、音效和动画效果。

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Point;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Game extends JPanel {
    private static final long serialVersionUID = 1L;

    private static final int WIDTH = 800;
    private static final int HEIGHT = 600;
    private static final int FPS = 60;

    private Image background;
    private Image player;
    private Image enemy;
    private Image bullet;

    private boolean gameRunning = true;
    private int score = 0;

    private Point playerPos = new Point(WIDTH / 2 - 25, HEIGHT - 75);
    private Point enemyPos = new Point(0, 0);
    private Point bulletPos = new Point(0, 0);
    private List<Point> enemyPath = new ArrayList<Point>();
    private boolean firing = false;

    private Random random = new Random();
    private int enemySpeed = 2;
    private int bulletSpeed = 5;

    private SoundPlayer soundPlayer = new SoundPlayer();
    private Font font = new Font("Arial", Font.BOLD, 30);

    public Game() {
        setPreferredSize(new Dimension(WIDTH, HEIGHT));
        setBackground(Color.BLACK);

        addMouseListener(new MouseAdapter() {
            public void mousePressed(MouseEvent e) {
                if (!firing) {
                    bulletPos.x = playerPos.x + 22;
                    bulletPos.y = playerPos.y - 10;
                    firing = true;
                    soundPlayer.play("shoot.wav");
                }
            }
        });

        addMouseMotionListener(new MouseMotionAdapter() {
            public void mouseMoved(MouseEvent e) {
                playerPos.x = e.getX() - 25;
                playerPos.y = e.getY() - 25;
            }
        });

        loadImages();
        startGameLoop();
    }

    private void loadImages() {
        try {
            URL bgUrl = getClass().getResource("background.png");
            background = ImageIO.read(bgUrl);

            URL playerUrl = getClass().getResource("player.png");
            player = ImageIO.read(playerUrl);

            URL enemyUrl = getClass().getResource("enemy.png");
            enemy = ImageIO.read(enemyUrl);

            URL bulletUrl = getClass().getResource("bullet.png");
            bullet = ImageIO.read(bulletUrl);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private void startGameLoop() {
        Thread gameThread = new Thread() {
            public void run() {
                while (gameRunning) {
                    long startTime = System.currentTimeMillis();

                    update();
                    repaint();

                    try {
                        long sleepTime = 1000 / FPS - (System.currentTimeMillis() - startTime);
                        if (sleepTime > 0) {
                            Thread.sleep(sleepTime);
                        }
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        };

        gameThread.start();
    }

    private void update() {
        if (enemyPath.isEmpty()) {
            int x = random.nextInt(WIDTH - 50);
            int y = random.nextInt(200) - 400;
            enemyPath.add(new Point(x, y));
            enemyPos.setLocation(x, 0);
        }

        Point nextPoint = enemyPath.get(0);
        if (enemyPos.x < nextPoint.x) {
            enemyPos.x += enemySpeed;
        } else if (enemyPos.x > nextPoint.x) {
            enemyPos.x -= enemySpeed;
        }

        if (enemyPos.y < nextPoint.y) {
            enemyPos.y += enemySpeed;
        } else if (enemyPos.y > nextPoint.y) {
            enemyPos.y -= enemySpeed;
        }

        if (enemyPos.x == nextPoint.x && enemyPos.y == nextPoint.y) {
            enemyPath.remove(0);
        }

        if (firing) {
            bulletPos.y -= bulletSpeed;

            if (bulletPos.y < 0) {
                firing = false;
            }

            if (bulletPos.x > enemyPos.x - 50 && bulletPos.x < enemyPos.x + 50
                    && bulletPos.y > enemyPos.y - 50 && bulletPos.y < enemyPos.y + 50) {
                score++;
                firing = false;
                soundPlayer.play("explode.wav");
            }
        }

        if (enemyPos.y > HEIGHT - 50) {
            gameRunning = false;
            soundPlayer.play("gameover.wav");
        }
    }

    public void paint(Graphics g) {
        super.paint(g);

        g.drawImage(background, 0, 0, null);
        g.drawImage(player, playerPos.x, playerPos.y, null);
        g.drawImage(enemy, enemyPos.x, enemyPos.y, null);

        if (firing) {
            g.drawImage(bullet, bulletPos.x, bulletPos.y, null);
        }

        g.setColor(Color.WHITE);
        g.setFont(font);
        g.drawString("Score: " + score, 20, 30);

        if (!gameRunning) {
            g.drawString("Game Over", WIDTH / 2 - 75, HEIGHT / 2 - 30);
            g.drawString("Score: " + score, WIDTH / 2 - 75, HEIGHT / 2);
        }
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Shooter Game");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setResizable(false);
        frame.add(new Game());
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

这个游戏是一个射击游戏，玩家通过鼠标控制角色的移动和射击，击中敌人得分，游戏结束条件是敌人到达底部或者玩家被击败。游戏中还包括了背景音乐和音效。