碰撞检测：在Java游戏中实现同类对象间变量访问的正确方法

public class Game {
    private Player player;
    private Sphere sphere;

    public Game() {
        player = new Player(10, 10); // 初始位置
        sphere = new Sphere(20, 20); // 初始位置
    }

    public void update() {
        // 更新玩家和球体的位置 (例如，根据用户输入)
        player.move(1, 0); // 示例：向右移动
        sphere.move(-1, 0); // 示例：向左移动

        // 碰撞检测
        if (checkCollision(player, sphere)) {
            System.out.println("碰撞发生！");
            // 执行碰撞后的逻辑，例如重置位置、扣除生命值等
        }
    }

    private boolean checkCollision(Player player, Sphere sphere) {
        // 简单的碰撞检测逻辑：判断两个对象的距离是否小于某个阈值
        double distance = Math.sqrt(Math.pow(player.getX() - sphere.getX(), 2) + Math.pow(player.getY() - sphere.getY(), 2));
        return distance < 10; // 碰撞半径
    }

    public static void main(String[] args) {
        Game game = new Game();
        // 模拟游戏循环
        for (int i = 0; i < 100; i++) {
            game.update();
            try {
                Thread.sleep(50); // 控制游戏速度
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

class Player {
    private int x;
    private int y;

    public Player(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public void move(int dx, int dy) {
        this.x += dx;
        this.y += dy;
    }
}

class Sphere {
    private int x;
    private int y;

    public Sphere(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public void move(int dx, int dy) {
        this.x += dx;
        this.y += dy;
    }
}