从零开发Java坦克大战：架构设计与难点突破 (下)

6. 游戏引擎类:

• 6.1 完整源码展示: 

• import javax.swing.*;
  import java.awt.*;
  import java.awt.event.KeyEvent;
  import java.awt.event.KeyListener;
  import java.util.ArrayList;
  import java.util.HashSet;
  import java.util.Random;
  import java.util.Set;public class GamePanel extends JPanel implements KeyListener {//GamePanel类是游戏的核心控制器，负责管理游戏循环、输入处理和游戏状态更新。private TankA tankA;private TankB tankB;private final Set<Integer> pressedKeys = new HashSet<>();private final Timer gameTimer;private final Random ran = new Random();private final BattleMaps map;private final scorePanel sPanel;private final ArrayList<Bullet> bullets = new ArrayList<>();private boolean gameOver = false;private String winner = "";public GamePanel() {map = new BattleMaps();sPanel = new scorePanel();// 生成坦克A的合法位置tankA = generatePositionA(45, 35);tankB = generatePositionB(45, 35);// 生成坦克B的合法位置（且不与A重叠）// 初始化游戏定时器（每16ms≈60FPS）//使用游戏循环（Timer）来定期处理按键状态，更新坦克位置。gameTimer = new Timer(7, e -> {processInput();// 处理输入updateGame();// 更新游戏状态SwingUtilities.invokeLater(this::repaint);// 请求重绘});gameTimer.start();setFocusable(true);addKeyListener(this);}private TankA generatePositionA(int width, int height) {Random ran = new Random();Rectangle tempRect;int x, y;do {x = 120 + ran.nextInt(900);y = 60 + ran.nextInt(750);tempRect = new Rectangle(x, y, width, height);} while (map.isCollidingWithWall(tempRect)); // 确保不生成在墙上return new TankA(x, y); // 或 TankB}private TankB generatePositionB(int width, int height) {Random ran = new Random();Rectangle tempRect;int x, y;do {x = 120 + ran.nextInt(900);y = 60 + ran.nextInt(750);tempRect = new Rectangle(x, y, width, height);} while (map.isCollidingWithWall(tempRect)); // 确保不生成在墙上return new TankB(x, y); // 或 TankB}private void processInput() {// 游戏结束时忽略所有输入if (gameOver) return;// 处理坦克A// 每次循环先重置速度tankA.setSpeedX(0);tankA.setSpeedY(0);// 根据当前按下的键设置速度if (pressedKeys.contains(KeyEvent.VK_A)) {tankA.setDirection(0);tankA.setSpeedX(-4);}if (pressedKeys.contains(KeyEvent.VK_D)) {tankA.setDirection(2);tankA.setSpeedX(4);}if (pressedKeys.contains(KeyEvent.VK_W)) {tankA.setDirection(1);tankA.setSpeedY(-4);}if (pressedKeys.contains(KeyEvent.VK_S)) {tankA.setDirection(3);tankA.setSpeedY(4);}// 处理坦克BtankB.setSpeedX(0);tankB.setSpeedY(0);if (pressedKeys.contains(KeyEvent.VK_LEFT)) {tankB.setDirection(0);tankB.setSpeedX(-4);}if (pressedKeys.contains(KeyEvent.VK_RIGHT)) {tankB.setDirection(2);tankB.setSpeedX(4);}if (pressedKeys.contains(KeyEvent.VK_UP)) {tankB.setDirection(1);tankB.setSpeedY(-4);}if (pressedKeys.contains(KeyEvent.VK_DOWN)) {tankB.setDirection(3);tankB.setSpeedY(4);}}private void updateGame() {if (gameOver) {return;}handleTankMovement(tankA);handleTankMovement(tankB);//更新子弹位置for (Bullet bullet : new ArrayList<>(bullets)) {bullet.move();//检测子弹与墙壁的碰撞if (map.isCollidingWithWall(bullet.getBounds())) {bullet.setActive(false);}//检测子弹与坦克碰撞if (bullet.isActive()) {