public Mypanel(){ setSize(352, 352); this.addKeyListener(this); readMap = new ReadMap(); this.map = readMap.getMaps(); this.tempmap=new ReadMap().getMaps(); this.mx = startx; this.my = starty; readmaps(level); requestFocus(); }

这段代码是一个 Mypanel 类的构造方法，用于初始化游戏画面。

在该方法中，设置了 Mypanel 对象的大小为 352x352，并将 KeyListener 监听器添加到该对象中。

接着，创建了一个 ReadMap 对象 readMap，并使用该对象的 getMaps() 方法获取游戏地图的信息，并将该信息存储于 Mypanel 对象的 map 和 tempmap 成员变量中。同时，使用 startx 和 starty 设置了游戏主角的初始位置，并调用 readmaps() 方法读取当前楼层的地图信息。

最后，调用 requestFocus() 方法使 Mypanel 对象获得焦点，以便玩家可以通过键盘进行游戏控制。

相关问题

根据以下代码介绍一下实现的界面 public MyPanel() { //监听键盘事件 this.addKeyListener(this); setSize(600, 600); readFile(level); } Image img11 = GameUtil.getImage("/pic/11.gif"); Image imagetx = GameUtil.getImage("/pic/1.png"); Image imageff = GameUtil.getImage("/pic/004.png"); public void paint(Graphics g) { Image[] maping = SetImage.GetImage(level); super.paint(g); for (int i = 0; i < 20; i++) { for (int j = 0; j < 20; j++) { g.drawImage(maping[tempmap[j][i]], i * 30, j * 30, null); } } g.drawImage(img11, 600, 80, null); g.drawImage(imagetx, 620, 550, null); g.drawImage(imagetx, 650, 550, null); g.setColor(new Color(233,150,122)); g.setFont(new Font("幼圆", Font.BOLD, 20)); g.drawString("现在是第" + level + "关", 625, 30); nowlever=level; g.drawString("现在的你，", 605, 220); g.drawString("已经走了：" +nowstep + "步", 605, 240); g.drawString("排行榜", 655, 300); //[排行榜实现 6.22]要有查询操作 返回一个字符数组（排序） g.drawString("第一名："+id1+" "+"礼物："+lw1+"步骤"+bz1); order(); for(int i=0;i<sites.size();i++){ g.drawString(sites.get(i),605,330+i*30); } sites.clear(); g.setFont(new Font("幼圆", Font.BOLD, 14)); g.setColor(new Color(255,165,0)); g.drawString("已经得到：" + nowgrift + "分", 605, 260); long usedTimem = (endTime-startTime)/60000; long usedTimes =(endTime-startTime)%60000/1000; Date date = new Date(); g.setColor(new Color(255,140,0)); if(usedTimem>=0||usedTimes>=0) g.drawString("用时：" +usedTimem+ "分钟"+usedTimes+"秒", 605, 280); g.drawString(date.toString(), 600, 590); } //实现排行榜功能取前三名 public void order(){ Connection conn = null; PreparedStatement pstmt = null; ResultSet rs = null; conn = JDBCUtils.getConnection(); String sql = "select grift,step,id from user order by grift desc,step asc limit 3 "; pstmt = conn.prepareStatement(sql); rs = pstmt.executeQuery(); String s=""; int fc=1; while(rs.next()){ s="第"+fc+"名："+rs.getNString("id"); sites.add(s); s="得分："+rs.getInt("grift")+" " +"步数"+rs.getInt("step"); sites.add(s); s=""; fc++; } System.out.println(sites);

这段代码实现了一个界面的绘制功能，继承自Panel类，并且实现了KeyListener接口。以下是对代码的简要介绍：

1. 在构造方法中设置了界面的大小并读取了一个文件。
2. 使用GameUtil的getImage方法加载了三张图片，分别是11.gif、1.png和004.png。
3. 重写了paint方法，在其中绘制了地图和其他的图像和文本信息。
4. 使用双重for循环绘制了地图，根据tempmap数组中的数据选择对应的图像进行绘制。
5. 使用drawImage方法绘制了img11、imagetx和imageff三张图片。
6. 设置了字体颜色和样式，使用drawString方法绘制了一些文本信息，包括当前关卡、已经走的步数、排行榜等。
7. 实现了排行榜功能，在order方法中使用JDBC连接数据库，查询前三名的得分和步数，并将结果存入字符数组sites中。
8. 最后在paint方法中使用drawString方法绘制排行榜信息。

需要注意的是，代码中涉及到一些变量和方法的调用，比如level、tempmap、nowstep、nowgrift等，这些变量和方法的定义部分没有提供，可能在其他文件中定义或实现。同时，代码中还使用了JDBCUtils类来获取数据库连接，需要确保该类的正确性和可用性。

希望以上介绍能对您有所帮助！

java代码实现坦克大战

坦克大战是经典的游戏，以下是一个简单的 Java 代码实现：

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

public class TankWar extends JFrame {
    private static final long serialVersionUID = 1L;

    // 窗口大小
    public static final int WIDTH = 800;
    public static final int HEIGHT = 600;

    private MyPanel mp;

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

    public TankWar() {
        mp = new MyPanel();
        this.add(mp);
        this.setTitle("坦克大战");
        this.setSize(WIDTH, HEIGHT);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);
        this.setResizable(false);
    }

    private class MyPanel extends JPanel implements KeyListener {
        private static final long serialVersionUID = 1L;
        private Tank myTank;
        private ArrayList<Tank> enemyTanks;
        private ArrayList<Missile> missiles;
        private ArrayList<Explode> explodes;

        public MyPanel() {
            myTank = new Tank(400, 500, true);
            enemyTanks = new ArrayList<Tank>();
            missiles = new ArrayList<Missile>();
            explodes = new ArrayList<Explode>();
            for (int i = 0; i < 5; i++) {
                enemyTanks.add(new Tank(i * 150, 0, false));
            }
            this.setFocusable(true);
            this.addKeyListener(this);
            new Thread(new EnemyTankThread()).start();
            new Thread(new MissileThread()).start();
            new Thread(new ExplodeThread()).start();
        }

        @Override
        public void paint(Graphics g) {
            super.paint(g);
            g.setColor(Color.BLACK);
            g.fillRect(0, 0, WIDTH, HEIGHT);
            myTank.draw(g);
            for (int i = 0; i < enemyTanks.size(); i++) {
                enemyTanks.get(i).draw(g);
            }
            for (int i = 0; i < missiles.size(); i++) {
                missiles.get(i).draw(g);
            }
            for (int i = 0; i < explodes.size(); i++) {
                explodes.get(i).draw(g);
            }
            g.setColor(Color.WHITE);
            g.drawString("Missiles: " + missiles.size(), 10, 30);
        }

        @Override
        public void keyPressed(KeyEvent e) {
            if (e.getKeyCode() == KeyEvent.VK_UP) {
                myTank.move(Tank.UP);
            } else if (e.getKeyCode() == KeyEvent.VK_DOWN) {
                myTank.move(Tank.DOWN);
            } else if (e.getKeyCode() == KeyEvent.VK_LEFT) {
                myTank.move(Tank.LEFT);
            } else if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
                myTank.move(Tank.RIGHT);
            } else if (e.getKeyCode() == KeyEvent.VK_SPACE) {
                missiles.add(myTank.fire());
            }
            repaint();
        }

        @Override
        public void keyReleased(KeyEvent e) {
        }

        @Override
        public void keyTyped(KeyEvent e) {
        }

        private class EnemyTankThread implements Runnable {
            @Override
            public void run() {
                while (true) {
                    try {
                        Thread.sleep(500);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    for (int i = 0; i < enemyTanks.size(); i++) {
                        enemyTanks.get(i).move((int) (Math.random() * 4));
                        if (Math.random() < 0.2) {
                            missiles.add(enemyTanks.get(i).fire());
                        }
                    }
                    repaint();
                }
            }
        }

        private class MissileThread implements Runnable {
            @Override
            public void run() {
                while (true) {
                    try {
                        Thread.sleep(50);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    for (int i = 0; i < missiles.size(); i++) {
                        Missile missile = missiles.get(i);
                        if (missile.isAlive()) {
                            missile.move();
                            for (int j = 0; j < enemyTanks.size(); j++) {
                                Tank enemyTank = enemyTanks.get(j);
                                if (enemyTank.isAlive() && missile.hit(enemyTank)) {
                                    explodes.add(new Explode(enemyTank.getX(), enemyTank.getY()));
                                    enemyTank.setAlive(false);
                                    missile.setAlive(false);
                                }
                            }
                            if (myTank.isAlive() && missile.hit(myTank)) {
                                explodes.add(new Explode(myTank.getX(), myTank.getY()));
                                myTank.setAlive(false);
                                missile.setAlive(false);
                            }
                        } else {
                            missiles.remove(i);
                            i--;
                        }
                    }
                    repaint();
                }
            }
        }

        private class ExplodeThread implements Runnable {
            @Override
            public void run() {
                while (true) {
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    for (int i = 0; i < explodes.size(); i++) {
                        Explode explode = explodes.get(i);
                        if (explode.isAlive()) {
                            explode.nextStep();
                        } else {
                            explodes.remove(i);
                            i--;
                        }
                    }
                    repaint();
                }
            }
        }
    }
}

class Tank {
    public static final int UP = 0;
    public static final int DOWN = 1;
    public static final int LEFT = 2;
    public static final int RIGHT = 3;

    private static final int SIZE = 30;
    private static final int SPEED = 5;

    private int x;
    private int y;
    private boolean good;
    private boolean alive;
    private int direction;

    public Tank(int x, int y, boolean good) {
        this.x = x;
        this.y = y;
        this.good = good;
        this.alive = true;
        this.direction = UP;
    }

    public void draw(Graphics g) {
        if (alive) {
            g.setColor(good ? Color.GREEN : Color.YELLOW);
            g.fillOval(x, y, SIZE, SIZE);
            g.setColor(good ? Color.DARK_GRAY : Color.LIGHT_GRAY);
            switch (direction) {
                case UP:
                    g.fillRect(x + SIZE / 2 - 5, y, 10, SIZE / 2);
                    break;
                case DOWN:
                    g.fillRect(x + SIZE / 2 - 5, y + SIZE / 2, 10, SIZE / 2);
                    break;
                case LEFT:
                    g.fillRect(x, y + SIZE / 2 - 5, SIZE / 2, 10);
                    break;
                case RIGHT:
                    g.fillRect(x + SIZE / 2, y + SIZE / 2 - 5, SIZE / 2, 10);
                    break;
            }
        }
    }

    public void move(int direction) {
        this.direction = direction;
        switch (direction) {
            case UP:
                y -= SPEED;
                if (y < 0) {
                    y = 0;
                }
                break;
            case DOWN:
                y += SPEED;
                if (y > TankWar.HEIGHT - SIZE) {
                    y = TankWar.HEIGHT - SIZE;
                }
                break;
            case LEFT:
                x -= SPEED;
                if (x < 0) {
                    x = 0;
                }
                break;
            case RIGHT:
                x += SPEED;
                if (x > TankWar.WIDTH - SIZE) {
                    x = TankWar.WIDTH - SIZE;
                }
                break;
        }
    }

    public Missile fire() {
        int missileX = x + SIZE / 2 - Missile.SIZE / 2;
        int missileY = y + SIZE / 2 - Missile.SIZE / 2;
        return new Missile(missileX, missileY, direction, good);
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public boolean isAlive() {
        return alive;
    }

    public void setAlive(boolean alive) {
        this.alive = alive;
    }
}

class Missile {
    public static final int SIZE = 10;
    public static final int SPEED = 10;

    private int x;
    private int y;
    private boolean good;
    private boolean alive;
    private int direction;

    public Missile(int x, int y, int direction, boolean good) {
        this.x = x;
        this.y = y;
        this.direction = direction;
        this.good = good;
        this.alive = true;
    }

    public void draw(Graphics g) {
        if (alive) {
            g.setColor(good ? Color.BLUE : Color.RED);
            g.fillOval(x, y, SIZE, SIZE);
        }
    }

    public void move() {
        switch (direction) {
            case Tank.UP:
                y -= SPEED;
                break;
            case Tank.DOWN:
                y += SPEED;
                break;
            case Tank.LEFT:
                x -= SPEED;
                break;
            case Tank.RIGHT:
                x += SPEED;
                break;
        }
        if (x < 0 || x > TankWar.WIDTH || y < 0 || y > TankWar.HEIGHT) {
            alive = false;
        }
    }

    public boolean hit(Tank tank) {
        if (good == tank.good) {
            return false;
        }
        if (x >= tank.getX() && x <= tank.getX() + Tank.SIZE && y >= tank.getY() && y <= tank.getY() + Tank.SIZE) {
            return true;
        }
        return false;
    }

    public boolean isAlive() {
        return alive;
    }

    public void setAlive(boolean alive) {
        this.alive = alive;
    }
}

class Explode {
    private static final int SIZE = 50;
    private static final int STEPS = 5;

    private int x;
    private int y;
    private boolean alive;
    private int step;

    public Explode(int x, int y) {
        this.x = x - SIZE / 2;
        this.y = y - SIZE / 2;
        this.alive = true;
        this.step = 0;
    }

    public void draw(Graphics g) {
        if (alive) {
            Color color = g.getColor();
            g.setColor(Color.ORANGE);
            g.fillOval(x, y, SIZE - step * 10, SIZE - step * 10);
            g.setColor(color);
            nextStep();
        }
    }

    public void nextStep() {
        step++;
        if (step == STEPS) {
            alive = false;
        }
    }

    public boolean isAlive() {
        return alive;
    }
}

这个代码实现了基本的游戏功能，包括坦克移动、开火、子弹碰撞、爆炸效果等。你可以尝试添加更多的功能来完善这个游戏。