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云代码 - java代码库

让主战坦克向8个方向行走

2017-03-28 作者： 云代码会员举报

[java]代码库

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import java.awt.*;
import java.awt.event.*;
 
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);
     
    Image offScreenImage = null;
     
    public void paint(Graphics g) {
 
        myTank.draw(g);//理解一下面向对象
    }
     
    public void update(Graphics g) {
        if(offScreenImage == null) {
            offScreenImage = this.createImage(GAME_WIDTH, GAME_WIDTH);
        }
        Graphics gOffScreen = offScreenImage.getGraphics();
        Color c = gOffScreen.getColor();
        gOffScreen.setColor(Color.GREEN);
        gOffScreen.fillRect(0, 0, GAME_WIDTH, GAME_WIDTH);
        gOffScreen.setColor(c);
        paint(gOffScreen);
        g.drawImage(offScreenImage, 0, 0, null);
    }
 
    public void lauchFrame() {
        this.setLocation(400, 300);
        this.setSize(GAME_WIDTH, GAME_WIDTH);
        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) {
 
            System.out.println("ok");
             
            myTank.keyPressed(e);
        }
         
    }
 
}
 
 
 
import java.awt.*;
import java.awt.event.*;
public class Tank {
 
public static final int XSPEED =5;
public static final int YSPEED =5;
 
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;  
     
     
    public Tank(int x, int y) {
        this.x = x;
        this.y = y;
    }
 
    public void draw(Graphics g)
    {
        Color c = g.getColor();
        g.setColor(Color.RED);
        g.fillOval(x, y, 30, 30);
        g.setColor(c);
             
        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;
        }
    }
     
     
    public void keyPressed(KeyEvent e)
    {
 
        int key=e.getKeyCode();
//      if(key==KeyEvent.VK_RIGHT)
//      {
//          x +=5;
//      }
         
        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_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() ;
         
    }
     
 
}


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