〖編程·Java〗坦克大战1

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Missile.java 
//Missile部分
import java.awt.*;

public class Missile {
    public static final int XSPEED = 10;
    public static final int YSPEED = 10;
    
    public static final int WIDTH = 10;
    public static final int HEIGHT = 10;
    
    int x, y;
    Tank.Direction dir;
    
    private boolean live = true;
    
    private TankClient tc;
    
    public Missile(int x, int y, Tank.Direction dir) {
        this.x = x;
        this.y = y;
        this.dir = dir;
    }
    
    public Missile(int x, int y, Tank.Direction dir, TankClient tc) {
        this(x, y, dir);
        this.tc = tc;
    }
    
    public void draw(Graphics g) {
        Color c = g.getColor();
        g.setColor(Color.BLACK);
        g.fillOval(x, y, WIDTH, HEIGHT);
        g.setColor(c);
        
        move();
    }

    private void move() {
        switch(dir) {
        case L:
            x -= XSPEED;
            break;
        case LU:
            x -= XSPEED;
            y -= YSPEED;
            break;
        case U:
            y -= YSPEED;
            break;
        case RU:
            x += XSPEED;
            y -= YSPEED;
            break;
        case R:
            x += XSPEED;
            break;
        case RD:
            x += XSPEED;
            y += YSPEED;
            break;
        case D:
            y += YSPEED;
            break;
        case LD:
            x -= XSPEED;
            y += YSPEED;
            break;
        case STOP:
            break;
        }
        
        if(x < 0 || y < 0 || x > TankClient.GAME_WIDTH || y > TankClient.GAME_HEIGHT) {
            live = false;
            tc.missiles.remove(this);
        }
    }

    public boolean isLive() {
        return live;
    }
}

Tank.java 
//Tank部分
import java.awt.*;
import java.awt.event.*;

public class Tank {
    public static final int XSPEED = 5;
    public static final int YSPEED = 5;
    
    public static final int WIDTH = 30;
    public static final int HEIGHT = 30;
    
    TankClient tc;
    
    private int x, y;
    
    private boolean bL=false, bU=false, bR=false, bD = false;
    enum Direction {L, LU, U, RU, R, RD, D, LD, STOP};
    
    private Direction dir = Direction.STOP;
    private Direction ptDir = Direction.D;

    public Tank(int x, int y) {
        this.x = x;
        this.y = y;
    }
    
    public Tank(int x, int y, TankClient tc) {
        this(x, y);
        this.tc = tc;
    }
    
    public void draw(Graphics g) {
        Color c = g.getColor();
        g.setColor(Color.RED);
        g.fillOval(x, y, WIDTH, HEIGHT);
        g.setColor(c);
        
        switch(ptDir) {
        case L:
            g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y + Tank.HEIGHT/2);
            break;
        case LU:
            g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y);
            break;
        case U:
            g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH/2, y);
            break;
        case RU:
            g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH, y);
            break;
        case R:
            g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH, y + Tank.HEIGHT/2);
            break;
        case RD:
            g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH, y + Tank.HEIGHT);
            break;
        case D:
            g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x + Tank.WIDTH/2, y + Tank.HEIGHT);
            break;
        case LD:
            g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y + Tank.HEIGHT);
            break;
        }
        
        move();
    }
    
    void move() {
        switch(dir) {
        case L:
            x -= XSPEED;
            break;
        case LU:
            x -= XSPEED;
            y -= YSPEED;
            break;
        case U:
            y -= YSPEED;
            break;
        case RU:
            x += XSPEED;
            y -= YSPEED;
            break;
        case R:
            x += XSPEED;
            break;
        case RD:
            x += XSPEED;
            y += YSPEED;
            break;
        case D:
            y += YSPEED;
            break;
        case LD:
            x -= XSPEED;
            y += YSPEED;
            break;
        case STOP:
            break;
        }
        
        if(this.dir != Direction.STOP) {
            this.ptDir = this.dir;
        }
        
        if(x < 0) x = 0;
        if(y < 30) y = 30;
        if(x + Tank.WIDTH > TankClient.GAME_WIDTH) x = TankClient.GAME_WIDTH - Tank.WIDTH;
        if(y + Tank.HEIGHT > TankClient.GAME_HEIGHT) y = TankClient.GAME_HEIGHT - Tank.HEIGHT;
    }
    
    public void keyPressed(KeyEvent e) {
        int key = e.getKeyCode();
        switch(key) {
        case KeyEvent.VK_LEFT :
            bL = true;
            break;
        case KeyEvent.VK_UP :
            bU = true;
            break;
        case KeyEvent.VK_RIGHT :
            bR = true;
            break;
        case KeyEvent.VK_DOWN :
            bD = true;
            break;
        }
        locateDirection();
    }
    
    void locateDirection() {
        if(bL && !bU && !bR && !bD) dir = Direction.L;
        else if(bL && bU && !bR && !bD) dir = Direction.LU;
        else if(!bL && bU && !bR && !bD) dir = Direction.U;
        else if(!bL && bU && bR && !bD) dir = Direction.RU;
        else if(!bL && !bU && bR && !bD) dir = Direction.R;
        else if(!bL && !bU && bR && bD) dir = Direction.RD;
        else if(!bL && !bU && !bR && bD) dir = Direction.D;
        else if(bL && !bU && !bR && bD) dir = Direction.LD;
        else if(!bL && !bU && !bR && !bD) dir = Direction.STOP;
    }

    public void keyReleased(KeyEvent e) {
        int key = e.getKeyCode();
        switch(key) {
        case KeyEvent.VK_CONTROL:
            fire();
            break;
        case KeyEvent.VK_LEFT :
            bL = false;
            break;
        case KeyEvent.VK_UP :
            bU = false;
            break;
        case KeyEvent.VK_RIGHT :
            bR = false;
            break;
        case KeyEvent.VK_DOWN :
            bD = false;
            break;
        }
        locateDirection();        
    }
    
    public Missile fire() {
        int x = this.x + Tank.WIDTH/2 - Missile.WIDTH/2;
        int y = this.y + Tank.HEIGHT/2 - Missile.HEIGHT/2;
        Missile m = new Missile(x, y, ptDir, this.tc);
        tc.missiles.add(m);
        return m;
    }
}

TankClient.java 
//TankClient部分
import java.awt.*;
import java.awt.event.*;
import java.util.List;
import java.util.ArrayList;

public class TankClient extends Frame {
    public static final int GAME_WIDTH = 800;
    public static final int GAME_HEIGHT = 600;
    
    Tank myTank = new Tank(50, 50, this);
    List<Missile> missiles = new ArrayList<Missile>();
    
    Image offScreenImage = null;
    
    public void paint(Graphics g) {
        g.drawString("missiles count:" + missiles.size(), 10, 50);
        
        for(int i=0; i<missiles.size(); i++) {
            Missile m = missiles.get(i);
            m.draw(g);
            //if(!m.isLive()) missiles.remove(m);
            //else m.draw(g);
        }
        
        myTank.draw(g);
    }
    
    public void update(Graphics g) {
        if(offScreenImage == null) {
            offScreenImage = this.createImage(GAME_WIDTH, GAME_HEIGHT);
        }
        Graphics gOffScreen = offScreenImage.getGraphics();
        Color c = gOffScreen.getColor();
        gOffScreen.setColor(Color.GREEN);
        gOffScreen.fillRect(0, 0, GAME_WIDTH, GAME_HEIGHT);
        gOffScreen.setColor(c);
        paint(gOffScreen);
        g.drawImage(offScreenImage, 0, 0, null);
    }

    public void lauchFrame() {
        //this.setLocation(400, 300);
        this.setSize(GAME_WIDTH, GAME_HEIGHT);
        this.setTitle("TankWar");
        this.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        this.setResizable(false);
        this.setBackground(Color.GREEN);
        
        this.addKeyListener(new KeyMonitor());
        
        setVisible(true);
        
        new Thread(new PaintThread()).start();
    }

    public static void main(String[] args) {
        TankClient tc = new TankClient();
        tc.lauchFrame();
    }
    
    private class PaintThread implements Runnable {

        public void run() {
            while(true) {
                repaint();
                try {
                    Thread.sleep(50);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    
    private class KeyMonitor extends KeyAdapter {

        public void keyReleased(KeyEvent e) {
            myTank.keyReleased(e);
        }

        public void keyPressed(KeyEvent e) {
            myTank.keyPressed(e);
        }
        
    }
}




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