用java写一个坦克大战

好的，下面是一个简单的 Java 实现坦克大战的示例代码：

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

public class TankWar extends JFrame implements KeyListener, Runnable {
    private static final long serialVersionUID = 1L;
    private int x = 100;
    private int y = 100;
    private int speed = 5;
    private boolean up, down, left, right;
    private int direction = 0;

    public TankWar() {
        setTitle("坦克大战");
        setSize(800, 600);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
        addKeyListener(this);
    }

    public void paint(Graphics g) {
        super.paint(g);
        g.fillRect(x, y, 30, 30);
    }

    public void keyPressed(KeyEvent e) {
        if (e.getKeyCode() == KeyEvent.VK_UP) {
            up = true;
            direction = 0;
        }
        if (e.getKeyCode() == KeyEvent.VK_DOWN) {
            down = true;
            direction = 2;
        }
        if (e.getKeyCode() == KeyEvent.VK_LEFT) {
            left = true;
            direction = 3;
        }
        if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
            right = true;
            direction = 1;
        }
    }

    public void keyReleased(KeyEvent e) {
        if (e.getKeyCode() == KeyEvent.VK_UP) {
            up = false;
        }
        if (e.getKeyCode() == KeyEvent.VK_DOWN) {
            down = false;
        }
        if (e.getKeyCode() == KeyEvent.VK_LEFT) {
            left = false;
        }
        if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
            right = false;
        }
    }

    public void keyTyped(KeyEvent e) {
    }

    public void run() {
        while (true) {
            if (up) {
                y -= speed;
            }
            if (down) {
                y += speed;
            }
            if (left) {
                x -= speed;
            }
            if (right) {
                x += speed;
            }
            repaint();
            try {
                Thread.sleep(50);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {
        TankWar tankWar = new TankWar();
        Thread thread = new Thread(tankWar);
        thread.start();
    }
}

这个示例代码中，我们通过继承 JFrame 类并实现 KeyListener 和 Runnable 接口来实现坦克的移动。在 paint() 方法中，我们使用 Graphics 类的 fillRect() 方法来画出坦克。在 keyPressed() 和 keyReleased() 方法中，我们根据按键来设置 up、down、left、right 和 direction 变量的值。在 run() 方法中，我们根据 up、down、left、right 变量的值来改变坦克的位置，并且使用 repaint() 方法来重新画出坦克。最后，在 main() 方法中，我们创建了一个 TankWar 对象，并且启动了一个新的线程来运行它。