java telnet实现的问题
代码如下：
*************************************************************************
package network;

import java.net.Socket;
import java.net.InetAddress;
import java.io.*;
import java.nio.ByteBuffer;

/**
* Created by IntelliJ IDEA.
* User: franck
* Date: 2007-4-25
* Time: 16:57:07
* To change this template use File | Settings | File Templates.
*/
public class test_telnet extends Thread {
Socket s = null;
BufferedReader reader = null;
InputStream in = null;
OutputStream out = null;
BufferedReader usr = null;
PrintWriter writer = null;
request req = null;
String host = null;
int port;

public test_telnet(String host, int port) {
this.host = host;
this.port = port;
}

public void run() {
try {
// String host = "bbs.fudan.edu.cn ";
// s = new Socket(host, 23);
// String host = "ftp.hjenglish.com ";
// s = new Socket(host, 21);

s = new Socket(host, port);
String line = " ";
String usrReply = " ";
//String startStr = "请输入帐号(试用请输入 'guest ', 注册请输入 'new '): ";

usr = new BufferedReader(new InputStreamReader(System.in));
reader = new BufferedReader(new InputStreamReader(s.getInputStream()));
writer = new PrintWriter(new OutputStreamWriter(s.getOutputStream()));
in = s.getInputStream();

out = s.getOutputStream();
System.out.println(s.toString());

req = new request(in, this);
req.start();


// int totalBinary = -1;
while (true) {
if ((line = usr.readLine().trim()) != null) {
//System.out.print(line);
byte[] binary = (line + "\r\n ").getBytes();
// writer.print(line+ "\n ");
out.write(binary);
out.flush();

if (line.equals( "quit "))
break;
}

synchronized (this) {
wait(50);
}
}

writer.close();
usr.close();
reader.close();
in.close();
out.close();
s.close();
} catch (Exception e) {

e.printStackTrace();
} finally {
try {
s.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

public static void main(String[] args) {
if (args.length == 2) {
String host = args[0];
int port = Integer.parseInt(args[1]);
test_telnet test = new test_telnet(host, port);
test.start();
}
}

class request extends Thread {
//BufferedReader br = null;
InputStream rin = null;
test_telnet telnet = null;

public request(/*BufferedReader r,*/ InputStream in, test_telnet tt) {
//this.br = r;
this.rin = in;
this.telnet = tt;
}

public void run() {
try {
int totalBinary = -1;
String line = " ";
InputStreamReader r = new InputStreamReader(in);
while (true) {
if (telnet.s.isClosed()) break;

if ((totalBinary = in.available()) > 0) {
byte[] binary = new byte[totalBinary];
in.read(binary);

line = new String(binary, "gb2312 ");
System.out.print(line);
}

synchronized (this) {
wait(20);
}
}

} catch (Exception e) {
e.printStackTrace();
} finally {
}
}


}
}

**************************************************************************

我启动程序可登陆bbs.fudan.edu.cn,但是我登陆公司的服务器是就只打印出??$这三个字符后就什么反应都没有了，我通过debug调试发现这三个byte分别是[0]=-1 [1]=-3 [2]=36,不知什么原因，但是使用dos telnet上去就不会出现这些问题，屏幕会直接提示要求输入用户名和密码，这是什么原因？请大家指导。

[解决办法]
乱码?