剪切代码：这是代码，我无法摆脱渲染 tank2 的行，当我切换正在向该服务器发送数据的客户端时它工作正常。这是我正在制作的游戏的服务器端：-
package dataEx;
import java.applet.*;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.net.MalformedURLException;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.URL;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageFilter;
import java.awt.image.ImageProducer;
import java.awt.image.RGBImageFilter;
import javax.imageio.ImageIO;
public class test extends Applet implements Runnable, ActionListener,MouseListener, MouseMotionListener,Serializable
{
dataToExchange xc;
public static Image makeColorTransparent(Image im, final Color color)
{
ImageFilter filter = new RGBImageFilter()
{
public int markerRGB = color.getRGB() | 0xFF000000; //color to make transparent
public final int filterRGB(int x, int y, int rgb)
{
if ( ( rgb | 0xFF000000 ) == markerRGB )
{
// Mark the alpha bits as zero - transparent
return 0x00FFFFFF & rgb;
}
else
{
// nothing to do
return rgb;
}
}
};
ImageProducer ip = new FilteredImageSource(im.getSource(), filter);
return Toolkit.getDefaultToolkit().createImage(ip);
}
private Image dbImage;
private Graphics dbg;
ServerSocket server;
Socket connection;
dataToExchange data_recv=null;
Thread t;
int frameNumber=0;
int speed=5,block_front=0,block_end=0;
int fire=0,tankSpeed=0,pressing=0;
int topnose_x1,topnose_x2,topnose_y1,topnose_y2;
int bck_x=-500;
int init_x=500,tank_y=500;
int hand_x,hand_y,mouth_x,mouth_y;
double theta =0.785,angle;
int moveWithBck=0,glass_x=500;
Boolean shoot=false;
Image cannon[]=new Image[6];
Image glass,glass_t;
Image background;
//String[] tankSeq=new String[6];
ObjectInputStream input;
ObjectOutputStream output;
public void init()
{
setCursor (Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
try
{
connect();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
setSize(1350,640);
setBackground( Color.white);
cannon[0]=getImage (getCodeBase (), "1.png");
cannon[1]=getImage (getCodeBase (), "2.png");
cannon[2]=getImage (getCodeBase (), "3.png");
cannon[3]=getImage (getCodeBase (), "4.png");
cannon[4]=getImage (getCodeBase (), "5.png");
cannon[5]=getImage (getCodeBase (), "6.png");
glass = getImage (getCodeBase (), "glass.png");
glass_t = makeColorTransparent(glass, Color.red);
background = getImage (getCodeBase (), "wall2.jpg");
}
private void connect() throws ClassNotFoundException
{
int portNumber=1232;
server = null;
try
{
server=new ServerSocket(portNumber,1);
while(true)
{
System.out.println("wainting for clients");
connection=server.accept();
input=new ObjectInputStream(connection.getInputStream());
output= new ObjectOutputStream(connection.getOutputStream());
String message=(String)input.readObject();
System.out.println("message "+message);
break;
}
} catch (IOException e) {
e.printStackTrace();
}
}
public void start()
{
Thread t = null;
t = new Thread( this );
t.start();
try {
SendTheChange();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void update (Graphics g) //overriding the update for double buffering
{
// initialize buffer
dbImage = createImage (this.getSize().width, this.getSize().height);
dbg = dbImage.getGraphics ();
// clear screen in background
dbg.setColor (getBackground());
dbg.fillRect (0, 0, this.getSize().width, this.getSize().height);
// draw elements in background
dbg.setColor (getForeground());
paint (dbg);
// draw image on the screen
g.drawImage (dbImage, 0, 0, this);
}
void drawTank(Graphics g) throws MalformedURLException, IOException
{
int tank_x=tankSpeed+init_x;
if(frameNumber<5)
{
if(pressing==1)
frameNumber=frameNumber+1;
}
else
frameNumber=0;
Image tank= ImageIO.read(new URL(getCodeBase(), "1.png"));
Image tank2 = makeColorTransparent(tank, new Color(0).white);
**g.drawImage (tank2, tank_x,tank_y, this)**; //I just cant get rid of this line
g.drawImage (cannon[frameNumber], tank_x,tank_y, this);
topnose_x1=tank_x+100;
topnose_x2=tank_x+150;
topnose_y1= tank_y+65;
topnose_y2=tank_y+50;
Graphics2D g2 = (Graphics2D) g;
g2.setStroke(new BasicStroke(7));
double base,height;
base=hand_x-topnose_x1;
height=topnose_y1-hand_y;
if(base<2)
{
base=2;
}
if(height<4)
{
height=4;
}
double tantheta=height/base;
theta=-Math.atan(tantheta);
topnose_x2=(int) (53*Math.cos(theta)+topnose_x1);
topnose_y2=(int) (53*Math.sin(theta)+topnose_y1);
g2.drawLine(topnose_x1,topnose_y1 , topnose_x2, topnose_y2);
g2.drawLine(topnose_x1+5,topnose_y1+4 , topnose_x2+2, topnose_y2+1);
g2.drawLine(topnose_x1+10, topnose_y1+5, topnose_x2+4, topnose_y2+2);
pressing=0;
}
void drawBackground(Graphics g)
{
g.drawImage (background,bck_x,0, this);
}
public void paint( Graphics g)
{
drawBackground(g);
try {
drawTank(g);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void run()
{
while (true)
{
try {
recieveChanges();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}{
// repaint the applet
repaint();
try
{
Thread.sleep (20);
}
catch (InterruptedException ex)
{
}
}
}
}
private void recieveChanges() throws IOException, ClassNotFoundException
{
data_recv=(dataToExchange)input.readObject();
//System.out.println("ds"+data_recv.xOffsetTank);
}
int checkBckRange()
{
int p_bck_x = 0;
if(bck_x<0)
{
p_bck_x=bck_x*-1;
block_front=0;
}
else
{
block_front=1;
}
//if(bck_x+bck_length>)
return p_bck_x;
}
private void SendTheChange() throws IOException
{
dataToExchange data=new dataToExchange() ;
int p_bck_x=checkBckRange();
int offset=p_bck_x+init_x;
data.frameIndex=frameNumber;
data.xOffsetTank=offset;
output.writeObject(data);
output.flush();
}
public boolean mouseMove (Event e, int x, int y)
{
hand_x=x;
hand_y=y;
return false;
}
public boolean mouseDrag (Event e, int x, int y)
{
hand_x=x;
hand_y=y;
return false;
}
public boolean mouseDown (Event e, int x, int y)
{
if(shoot==false)
{
shoot=true;
mouth_x=topnose_x1;
mouth_y=topnose_y1-2;
moveWithBck=0;
angle=-theta;
//System.out.println(x+" "+y+"\n");
}
return true;
}
public boolean keyDown(Event e, int key)
{
// user presses left cursor key
if (key == 'a'&& block_front==0)
{
bck_x=bck_x+speed;
moveWithBck=moveWithBck+speed;
pressing=1;
}
// user presses right cursor key
else if (key == 'd')
{
bck_x=bck_x-speed;
moveWithBck=moveWithBck-speed;
pressing=1;
}
else if (key == 'w')
{
tank_y=tank_y-200;
}
else if (key == 's')
{
tank_y=tank_y-200;
}
try {
SendTheChange();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
return true;
}
@Override
public void mouseDragged(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseMoved(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseClicked(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseEntered(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
}
}