写一个马里奥小游戏用java语言

好的，以下是一个简单的马里奥小游戏的 Java 代码，实现了基本的移动和跳跃功能：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class MarioGame extends JFrame implements ActionListener {
    private static final int WIDTH = 800;
    private static final int HEIGHT = 600;
    private static final int GROUND_Y = 500;
    private static final int MARIO_WIDTH = 50;
    private static final int MARIO_HEIGHT = 50;
    private static final int MARIO_JUMP_HEIGHT = 100;
    private static final int MARIO_JUMP_SPEED = 10;

    private Timer timer;
    private boolean isJumping;
    private int jumpCount;
    private int marioX;
    private int marioY;
    private int marioSpeedX;
    private int marioSpeedY;

    public MarioGame() {
        setTitle("Mario Game");
        setSize(WIDTH, HEIGHT);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        isJumping = false;
        jumpCount = 0;
        marioX = 0;
        marioY = GROUND_Y - MARIO_HEIGHT;
        marioSpeedX = 0;
        marioSpeedY = 0;

        timer = new Timer(20, this);
        timer.start();

        addKeyListener(new KeyAdapter() {
            public void keyPressed(KeyEvent e) {
                int keyCode = e.getKeyCode();
                if (keyCode == KeyEvent.VK_LEFT) {
                    marioSpeedX = -5;
                } else if (keyCode == KeyEvent.VK_RIGHT) {
                    marioSpeedX = 5;
                } else if (keyCode == KeyEvent.VK_SPACE && !isJumping) {
                    isJumping = true;
                    jumpCount = 0;
                    marioSpeedY = -MARIO_JUMP_SPEED;
                }
            }

            public void keyReleased(KeyEvent e) {
                int keyCode = e.getKeyCode();
                if (keyCode == KeyEvent.VK_LEFT || keyCode == KeyEvent.VK_RIGHT) {
                    marioSpeedX = 0;
                }
            }
        });

        setFocusable(true);
        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        updateMarioPosition();
        repaint();
    }

    private void updateMarioPosition() {
        marioX += marioSpeedX;

        if (isJumping) {
            marioY += marioSpeedY;
            jumpCount++;

            if (jumpCount == MARIO_JUMP_HEIGHT / MARIO_JUMP_SPEED) {
                marioSpeedY = MARIO_JUMP_SPEED;
            }

            if (marioY >= GROUND_Y - MARIO_HEIGHT) {
                marioY = GROUND_Y - MARIO_HEIGHT;
                isJumping = false;
            }
        }
    }

    public void paint(Graphics g) {
        super.paint(g);

        g.setColor(Color.GREEN);
        g.fillRect(0, GROUND_Y, WIDTH, HEIGHT - GROUND_Y);

        g.setColor(Color.RED);
        g.fillRect(marioX, marioY, MARIO_WIDTH, MARIO_HEIGHT);
    }

    public static void main(String[] args) {
        new MarioGame();
    }
}

这个马里奥小游戏实现了基本的移动和跳跃功能。玩家可以用左右箭头键控制马里奥的移动，用空格键控制马里奥的跳跃。游戏中有一个绿色的地面和一个红色的马里奥。玩家可以在地面上移动和跳跃，如果跳得太高会落回地面。