java编程一个最简单游戏代码

下面是一个简单的Java游戏代码示例，其中玩家需要通过移动箭头来躲避障碍物：

import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class SimpleGame extends JPanel implements KeyListener {
  
  private int playerX = 250;
  private int playerY = 250;
  private int obstacleX = 100;
  private int obstacleY = 100;
  private boolean gameRunning = true;

  public SimpleGame() {
    JFrame frame = new JFrame("Simple Game");
    frame.setSize(500, 500);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setResizable(false);
    frame.addKeyListener(this);
    frame.add(this);
    frame.setVisible(true);
  }

  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    setBackground(Color.WHITE);
    g.setColor(Color.BLACK);
    g.fillRect(playerX, playerY, 20, 20);
    g.setColor(Color.RED);
    g.fillRect(obstacleX, obstacleY, 20, 20);
  }

  public void keyTyped(KeyEvent e) {}

  public void keyPressed(KeyEvent e) {
    if (e.getKeyCode() == KeyEvent.VK_LEFT) {
      playerX -= 10;
    } else if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
      playerX += 10;
    } else if (e.getKeyCode() == KeyEvent.VK_UP) {
      playerY -= 10;
    } else if (e.getKeyCode() == KeyEvent.VK_DOWN) {
      playerY += 10;
    }
    checkCollision();
    repaint();
  }

  public void keyReleased(KeyEvent e) {}

  private void checkCollision() {
    if (playerX < obstacleX + 20 &&
        playerX + 20 > obstacleX &&
        playerY < obstacleY + 20 &&
        playerY + 20 > obstacleY) {
      gameRunning = false;
      System.out.println("Game Over!");
    }
  }

  public void run() {
    while (gameRunning) {
      obstacleX += 5;
      if (obstacleX > 500) {
        obstacleX = 0;
      }
      try {
        Thread.sleep(20);
      } catch (InterruptedException e) {}
      checkCollision();
      repaint();
    }
  }

  public static void main(String[] args) {
    SimpleGame game = new SimpleGame();
    game.run();
  }
}

在这个游戏中，玩家控制一个矩形，通过移动箭头键来躲避障碍物。障碍物会从左侧移动到右侧，当玩家与障碍物相撞时游戏结束。玩家可以通过修改代码来调整游戏难度或添加更多的游戏元素。