ADD file via upload

src/GameController.java

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+package com.snakegame;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class GameController implements ActionListener {
+    private final Timer timer;
+    private final GamePanel panel;
+    private boolean isPaused = false;
+
+    public GameController(GamePanel panel) {
+        this.panel = panel;
+        this.timer = new Timer(panel.getConfig().getSpeed(), this);
+    }
+
+    public void start() {
+        timer.start();
+    }
+
+    public void pause() {
+        isPaused = !isPaused;
+        if (isPaused) {
+            timer.stop();
+        } else {
+            timer.start();
+        }
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        if (!isPaused) {
+            gameLoop();
+        }
+    }
+
+    private void gameLoop() {
+        Snake snake1 = panel.getSnake1();
+        Snake snake2 = panel.getSnake2();
+        Food food = panel.getFood();
+        GameConfig config = panel.getConfig();
+
+        // 移动蛇
+        snake1.move();
+        if (config.getGameMode().equals("双人")) {
+            snake2.move();
+        }
+
+        // 碰撞检测
+        Point head1 = snake1.getHead();
+        if (CollisionUtils.checkWallCollision(head1, config) ||
+                snake1.getBody().subList(1, snake1.getBody().size()).contains(head1) ||
+                (config.getGameMode().equals("双人") && snake2.getBody().contains(head1))) {
+            gameOver();
+            return;
+        }
+
+        if (config.getGameMode().equals("双人")) {
+            Point head2 = snake2.getHead();
+            if (CollisionUtils.checkWallCollision(head2, config) ||
+                    snake2.getBody().subList(1, snake2.getBody().size()).contains(head2) ||
+                    snake1.getBody().contains(head2)) {
+                gameOver();
+                return;
+            }
+        }
+
+        // 食物检测
+        if (head1.equals(food.getPosition())) {
+            snake1.grow();
+            panel.increaseScore1();
+            food.respawn();
+        }
+
+        if (config.getGameMode().equals("双人")) {
+            Point head2 = snake2.getHead();
+            if (head2.equals(food.getPosition())) {
+                snake2.grow();
+                panel.increaseScore2();
+                food.respawn();
+            }
+        }
+
+        panel.repaint();
+    }
+
+    private void gameOver() {
+        timer.stop();
+        String message;
+        if (panel.getConfig().getGameMode().equals("单人")) {
+            message = "得分: " + panel.getScore1();
+        } else {
+            message = "得分: 蛇1 - " + panel.getScore1() + ", 蛇2 - " + panel.getScore2();
+        }
+        Object[] options = {"继续", "退出"};
+        int result = JOptionPane.showOptionDialog(panel,
+                message,
+                "游戏结束",
+                JOptionPane.DEFAULT_OPTION,
+                JOptionPane.INFORMATION_MESSAGE,
+                null,
+                options,
+                options[1]);
+        if (result == 0) {
+            Main.showSettingsFrame();
+        } else {
+            System.exit(0);
+        }
+    }
+}