import java.net.*;
import java.io.*;
public class CSTest extends Thread
{

private Socket s;
public CSTest(Socket s)
{
this.s=s;
}
public void run()
{
try {
OutputStream os=s.getOutputStream();
BufferedOutputStream bos=new BufferedOutputStream(os);
InputStream is=s.getInputStream();
bos.write("欢迎连接服务器!".getBytes());
byte[] buf=new byte[1024];
int len=is.read(buf);
System.out.println(new String(buf,0,len));
bos.close();
is.close();
s.close();
}
catch (Exception ex) {
ex.printStackTrace();
}
}
public static void main(String[] args)
{
if(args.length>0)
server();
else
client();
}
public static void server()
{
try {
ServerSocket ss=new ServerSocket(6500);
while(true)
{
Socket s = ss.accept();
new CSTest(s).start();
}

}
catch (Exception ex) {
ex.printStackTrace();
}
}
public static void client()
{
try {
Socket s=new Socket(InetAddress.getByName(null),6500);
OutputStream os=s.getOutputStream();
InputStream is=s.getInputStream();
byte[] buf=new byte[1024];
int len=is.read(buf);
System.out.println(new String(buf,0,len));
os.write("哈哈，狂放不羁想连接服务器".getBytes());
os.close();;
is.close();
s.close();
}
catch (Exception ex) {
ex.printStackTrace();
}

}
}

打算做个简单网络聊天工具，今天看了一下.net包，写了个小练手程序，但是为什么不能运行呢？各位帮忙看看。

[此贴子已经被作者于2007-6-27 0:03:00编辑过]

这是因为你这句:

      byte[] buf=new byte[1024];
      int len=is.read(buf);

import java.net.*;
import java.io.*;
import java.util.*;
public class CSTest extends Thread
{
  
  private Socket s;
  public CSTest(Socket s)
  {
    this.s=s;
  }
  public void run()
  {
    try {
      OutputStream os=s.getOutputStream();
      BufferedReader br= new BufferedReader(new InputStreamReader(s.getInputStream()));
      os.write(\"欢迎连接服务器!\n\".getBytes());
      String line;
      while(true){
          line =br.readLine();
          System.out.println(\"[\"+s+\"] say:\"+line);
          os.write((line+\"\n\").getBytes());
          if(line.equals(\"bye\")){ 
            System.out.println(\"[\"+s+\"] disconnected!\");
            break;
          }
      }
      os.close();
      br.close();
      s.close();
    }
    catch (Exception ex) {
      ex.printStackTrace();
    }
  }
  public static void main(String[] args)
  {
    if(args.length>0)
      server();
    else
      client();
  }
  public static void server()
  {
    try {
      ServerSocket ss=new ServerSocket(6600);
      while(true)
      {
        Socket s = ss.accept();
        new CSTest(s).start();
      }

    }
    catch (Exception ex) {
      ex.printStackTrace();
    }
  }
  public static void client()
  {
    try {
      Socket s=new Socket(InetAddress.getByName(null),6600);
      OutputStream os=s.getOutputStream();
      BufferedReader br= new BufferedReader(new InputStreamReader(s.getInputStream()));
      System.out.println(br.readLine());
      String line;
      Scanner scan =new Scanner(System.in);
      while(true){
        System.out.print(\">:\");
        os.write((scan.nextLine()+\"\n\").getBytes());
        line =br.readLine();
        System.out.print(\"<:\"+line+\"\n\");
        if(line.equals(\"bye\")) break;
      }
      os.close();;
      br.close();
      s.close();
    }
    catch (Exception ex) {
      ex.printStackTrace();
    }
  }
}

哦 哈哈，谢谢Eastsun老哥。。我看看。