编写一个坦克大战的java代码

很高兴回答你的问题。下面是一个简单的坦克大战的Java代码示例，供您参考：

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 TankWar extends JPanel implements KeyListener {

    private static final long serialVersionUID = 1L;

    private int x = 0;
    private int y = 0;

    private Tank tank;

    public TankWar() {
        tank = new Tank(Color.BLUE, 200, 200);
        tank.setKeyListener(this);
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("坦克大战");
        frame.setSize(600, 600);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        TankWar game = new TankWar();
        frame.add(game);
        frame.setVisible(true);

        while (true) {
            game.repaint();
            try {
                Thread.sleep(10);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    public void paint(Graphics g) {
        super.paint(g);
        tank.draw(g);
    }

    @Override
    public void keyPressed(KeyEvent e) {
        tank.keyPressed(e);
    }

    @Override
    public void keyReleased(KeyEvent e) {
        tank.keyReleased(e);
    }

    @Override
    public void keyTyped(KeyEvent e) {}

}

class Tank {

    private Color color;
    private int x;
    private int y;
    private int speedX = 5;
    private int speedY = 5;
    private boolean left, right, up, down;
    private KeyListener listener;

    public Tank(Color color, int x, int y) {
        this.color = color;
        this.x = x;
        this.y = y;
    }

    public void setKeyListener(KeyListener listener) {
        this.listener = listener;
    }

    public void draw(Graphics g) {
        g.setColor(color);
        g.fillRect(x, y, 50, 50);
    }

    public void keyPressed(KeyEvent e) {
        int code = e.getKeyCode();

        switch (code) {
        case KeyEvent.VK_LEFT:
            left = true;
            break;
        case KeyEvent.VK_RIGHT:
            right = true;
            break;
        case KeyEvent.VK_UP:
            up = true;
            break;
        case KeyEvent.VK_DOWN:
            down = true;
            break;
        }

        move();
    }

    public void keyReleased(KeyEvent e) {
        int code = e.getKeyCode();

        switch (code) {
        case KeyEvent.VK_LEFT:
            left = false;
            break;
        case KeyEvent.VK_RIGHT:
            right = false;
            break;
        case KeyEvent.VK_UP:
            up = false;
            break;
        case KeyEvent.VK_DOWN:
            down = false;
            break;
        }

        move();
    }

    private void move() {
        if (left) {
            x -= speedX;
        } else if (right) {
            x += speedX;
        }

        if (up) {
            y -= speedY;
        } else if (down) {
            y += speedY;
        }
    }

}

希望对您有所帮助！