import java.applet.Applet; 
import java.awt.*; 
import java.io.*; 
import java.net.*; 

public class TicTacToeclient extends Applet implements Runnable 
{//class1 
TextField id; 
Panel boardpanel, panel2; 
Square board[][],currentsquare; 
Socket connection; 
DataInputStream input; 
DataOutputStream output; 
Thread outputThread; 
char mymark; 
TextArea display; 
public void init() 
{ 
setLayout(new BorderLayout()); 
display=new TextArea(4,30); 
display.setEditable(false); 
add("South",display); 
boardpanel=new Panel(); 
boardpanel.setBackground(Color.cyan); 
boardpanel.setLayout(new GridLayout(3,3,0,0)); 
board=new Square[3][3]; 
for(int row=0; row<board.length; row++) 
for(int col=0; col<board[row].length; col++) 
{ 
board[row][col]=new Square(); 
repaint(); 
boardpanel.add(board[row][col]); 
} 
id=new TextField(); 
id.setEditable(false); 
add("North",id); 
panel2=new Panel(); 
panel2.add(boardpanel); 
add("Center",panel2); 
} 
//////////end 
public void start() 
{ 
try{ 
connection=new Socket(InetAddress.getLocalHost(),5000); 
input=new DataInputStream(connection.getInputStream()); 
output=new DataOutputStream(connection.getOutputStream()); 
} 
catch(IOException e){ 
//e.printStackTrace(); 
} 
outputThread=new Thread(this); 
outputThread.start(); 
} 
//////////end 
public boolean mouseUP(Event e, int x, int y) 
{ 
for( int row=0; row<board.length; row++) 
{ 
for(int col=0; col<board[row].length; col++) 
try{ 
if(e.target==board[row][col]) 
{ 
currentsquare=board[row][col]; 
output.writeInt(row*3+col); 
} 
} 
catch(IOException ie){ 
//ie.printStackTrace(); 
} 
} 
return true; 
} 
//////////end 
public void run() 
{ 
try{ 
mymark=input.readChar(); 
id.setText("歡迎您玩家\""+mymark+"\""); 
} 
catch(IOException e){ 
e.printStackTrace(); 
} 
while(true) 
{ 
try{ 
String s=input.readUTF(); 
processMessage(s); 
} 
catch(IOException e){ 
//e.printStackTrace(); 
} 
} 
} 
//////////end 
public void processMessage(String s) 
{ 
if(s.equals("Valid move")) 
{ 
display.appendText("Valid move,please wait\n"); 
currentsquare.setMark(mymark); 
currentsquare.repaint(); 
} 
else if(s.equals("Invalid move,tryagain")) 
{ 
display.appendText(s+"\n"); 
} 
else if(s.equals("Opponent moved")) 
{ 
try{ 
int loc=input.readInt(); 
done: 
for(int row=0; row<board.length; row++) 
for(int col=0; col<board[row].length; col++) 
if(row*3+col==loc) 
{ 
board[row][col].setMark(mymark=='x' ? 'o':'x'); 
board[row][col].repaint(); 
break done; 
} 
display.appendText("Opponent moved.Yourturn\n"); 
} 
catch(IOException e){ 
e.printStackTrace(); 
} 
} 
else 
{ 
display.appendText(s+"\n"); 
} 
} 



}//class1.end 
////////////////////////////////////// 
class Square extends Canvas 
{//class2 
char mark; 
public Square() 
{ 
resize(30,30); 
} 
//////////end 
public void setMark(char c) 
{ 
mark=c; 
} 
//////////end 
public void paint(Graphics g) 
{ 
g.drawRect(0,0,29,29); 
g.drawString(String.valueOf(mark),11,20); 
} 

}//class2.end 
//<applet code="TicTacToeclient.class" width=275 height=300></applet> 
服務(wù)器端： 
import java.awt.*; 
import java.net.*; 
import java.io.*; 
public class TicTacToeServer extends Frame 
{//class1 
private byte board[]; 
private boolean xMove; 
private TextArea output; 
private Player players[]; 
private ServerSocket server; 
private int numberofplayers; 
private int currentplayer; 
public TicTacToeServer() 
{ 
super("三子棋服務(wù)器"); 
board=new byte[9]; 
xMove=true; 
players=new Player[2]; 
currentplayer=0; 
try{ 
server=new ServerSocket(5000,2); 
} 
catch(IOException e){ 
// e.printStackrace(); 
System.exit(1); 
} 

output=new TextArea(); 
output.setBackground(Color.yellow); 
add("Center",output); 
resize(300,300); 
show(); 
Toolkit tp=Toolkit.getDefaultToolkit(); 
Image logo=tp.getImage("1.gif"); 
setIconImage(logo); 
setResizable(false); 
} 
//////////end 
public void execute() 
{ 
for(int i=0; i<players.length; i++) 
{ 
try{ 
players[i]=new Player(server.accept(), this, i); 
players[i].start(); 
++numberofplayers; 
} 
catch(IOException e){ 
//e.printStackrace(); 
System.exit(1); 
} 
} 
} 
//////////end 
public int getNumberOfplayers() 
{ 
return numberofplayers; 
} 
//////////end 
public void display(String s) 
{ 
output.appendText(s+"\n"); 
} 
/////////end 
public boolean validMove(int loc,int player) 
{ 
boolean moveDone=false; 
while(player!=currentplayer) 
{ 
try{ 
wait(); 
} 
catch(InterruptedException e){//not 
} 
} 
if(isOccupied(loc)) 
{ 
board[loc]=(byte)(currentplayer==0 ? 'x' : 'o'); 
currentplayer=++currentplayer%2; 
players[currentplayer].otherplayerMoved(loc); 
notify(); 
return true; 
} 
else 
return false; 
} 
//////////end 
public boolean isOccupied(int loc) 
{ 
if(board[loc]=='x'||board[loc]=='o') 
return true; 
else 
return false; 
} 
//////////end 
public boolean handleEvent(Event event) 
{ 
if(event.id==Event.WINDOW_DESTROY) 
{ 
hide(); 
dispose(); 
for(int i=0; i<players.length; i++) 
players[i].stop(); 
System.exit(0); 

} 
return super.handleEvent(event); 
} 
//////////end 
public boolean gameOver() 
{ 
return false; 
} 
//////////end 
public static void main(String args[]) 
{ 
TicTacToeServer game=new TicTacToeServer(); 
game.execute(); 
} 
}//class1.end 
////////////////////////////////////////////////next.class 
class Player extends Thread 
{//class2 
Socket connection; 
DataInputStream input; 
DataOutputStream output; 
TicTacToeServer control; 
int number; 
char mark; 
public Player(Socket s, TicTacToeServer t,int num) 
{ 
mark=(num==0 ? 'x' : 'o'); 
connection=s; 
try{ 
input=new DataInputStream(connection.getInputStream()); 
output=new DataOutputStream(connection.getOutputStream()); 
} 
catch(IOException e){ 
//e.printStackTrale(); 
System.exit(1); 
} 
control=t; 
number=num; 
} 
//////////end 
public void otherplayerMoved(int loc) 
{ 
try{ 
output.writeUTF("Opponet moved"); 
output.writeInt(loc); 
} 
catch(IOException e){//not 
} 
} 
//////////end 
public void run() 
{ 
boolean done=false; 
try{ 
control.display("玩家"+(number==0 ? 'x' : 'o')+"以登陸！"); 
output.writeChar(mark); 
output.writeUTF("玩家"+(number==0 ? "x 以登陸！\n" : "o 以登陸,請等待！\n")); 
if(control.getNumberOfplayers()<2) 
{ 
output.writeUTF("請您等待另一個(gè)玩家登陸！"); 
while(control.getNumberOfplayers()<2); 
output.writeUTF("另一個(gè)玩家已經(jīng)登陸！現(xiàn)在您可以走棋了！"); 
} 
while(!done) 
{ 
int location=input.readInt(); 
if(control.validMove(location,number)) 
{ 
control.display("loc"+location); 
output.writeUTF("Valic move."); 
} 
else 
output.writeUTF("INvalid move,tryagain"); 
if(control.gameOver()) 
{ 
done=true; 
} 
connection.close(); 
} 

} 
catch(IOException e){ 
e.printStackTrace(); 
System.exit(1); 
} 
} 
}//class.end