java">package org.timer;import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;public class GameCameraWithObjects extends JPanel implements KeyListener {// 游戏世界大小private final int worldWidth = 2000;private final int worldHeight = 1500;// 摄像机位置private int cameraX = 0;private int cameraY = 0;// 摄像机视野大小private final int viewWidth = 800;private final int viewHeight = 600;// 玩家位置private int playerX = 400;private int playerY = 300;// 世界中的对象private final List<GameObject> gameObjects = new ArrayList<>();private final Random random = new Random();public GameCameraWithObjects() {setPreferredSize(new Dimension(viewWidth, viewHeight));addKeyListener(this);setFocusable(true);generateGameObjects(50); // 生成 50 个随机对象}// 生成游戏世界中的随机对象private void generateGameObjects(int count) {for (int i = 0; i < count; i++) {int x = random.nextInt(worldWidth);int y = random.nextInt(worldHeight);int size = 40; // 随机大小 10-40
//            int size = random.nextInt(30) + 10; // 随机大小 10-40Color color = new Color(random.nextInt(255), random.nextInt(255), random.nextInt(255));gameObjects.add(new GameObject(x, y, size, color));}}@Overrideprotected void paintComponent(Graphics g) {super.paintComponent(g);// 填充背景g.setColor(Color.LIGHT_GRAY);g.fillRect(0, 0, viewWidth, viewHeight);// 绘制世界边界g.setColor(Color.BLACK);g.drawRect(-cameraX, -cameraY, worldWidth, worldHeight);// 绘制所有对象for (GameObject obj : gameObjects) {int screenX = obj.x - cameraX;int screenY = obj.y - cameraY;// 只绘制在视野内的对象if (screenX + obj.size > 0 && screenX < viewWidth && screenY + obj.size > 0 && screenY < viewHeight) {g.setColor(obj.color);g.fillRect(screenX, screenY, obj.size, obj.size);g.drawString("("+obj.x+","+obj.y+")", screenX, screenY);}}// 绘制玩家g.setColor(Color.RED);int screenX = playerX - cameraX;int screenY = playerY - cameraY;g.fillRect(screenX - 10, screenY - 10, 20, 20);// 显示调试信息g.setColor(Color.BLACK);g.drawString("Camera: (" + cameraX + ", " + cameraY + ")", 10, 20);g.drawString("Player: (" + playerX + ", " + playerY + ")", 10, 40);g.drawString("Objects: " + gameObjects.size(), 10, 60);}// 更新摄像机位置private void updateCamera() {
//        cameraX = playerX - viewWidth / 2;cameraX = Math.max(0, Math.min(playerX - viewWidth / 2, worldWidth - viewWidth));
//        cameraY = Math.max(0, Math.min(playerY - viewHeight / 2, worldHeight - viewHeight));cameraY = Math.max(0, Math.min(playerY - viewHeight / 2, worldHeight - viewHeight));}@Overridepublic void keyPressed(KeyEvent e) {int speed = 10;switch (e.getKeyCode()) {case KeyEvent.VK_UP -> playerY = Math.max(0, playerY - speed);case KeyEvent.VK_DOWN -> playerY = Math.min(worldHeight, playerY + speed);case KeyEvent.VK_LEFT -> playerX = Math.max(0, playerX - speed);case KeyEvent.VK_RIGHT -> playerX = Math.min(worldWidth, playerX + speed);}// 更新摄像机updateCamera();repaint();}@Overridepublic void keyReleased(KeyEvent e) {}@Overridepublic void keyTyped(KeyEvent e) {}public static void main(String[] args) {JFrame frame = new JFrame("Game Camera with Objects");GameCameraWithObjects gamePanel = new GameCameraWithObjects();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.add(gamePanel);frame.pack();frame.setVisible(true);}// 内部类表示游戏对象private static class GameObject {int x, y, size;Color color;public GameObject(int x, int y, int size, Color color) {this.x = x;this.y = y;this.size = size;this.color = color;}}
}