socket连接问题
请问大侠们,我在网上找了一个whois的简单程序,但是运行起来总是报错是
java.net.ConnectException:   Connection   timed   out:   connect 
 源程序如下: 
 import   java.net.*; 
 import   java.io.*;   
 public   class   whois 
 { 
 public   final   static   int   port   =   43; 
 public   final   static   String   hostname   =    "10.0.0.51 ";   
 public   static   void   main(String[]   args) 
 { 
 Socket   theSocket; 
 DataInputStream   theWhoisStream; 
 PrintStream   ps;   
 //检查命令行参数 
 if   (args.length    <1) 
 { 
 System.out.println( "\nUsage:   java   whois    <command>  "); 
 System.out.println( "Parameters: "); 
 System.out.println( 
  "\tcommand   =   one   or   more   Domain   name,   or   other   command. "); 
 System.out.println( "Example: "); 
 System.out.println( "\tjava   whois   sohu.com "); 
 System.out.println( "\tjava   whois   help ");   
 System.exit(1);   //退出 
 } 
 while(true) 
 { 
 try   {  	 
 //在TCP服务端口43(十进制)连接SRI-NIC服务主机 
 theSocket   =   new   Socket( "10.0.0.51 ",   port); 
 System.out.println( "Socket   connected! "); 
 ps   =   new   PrintStream(theSocket.getOutputStream()); 
 //发送用户提供的一个或多个命令 
 for   (int   i   =   0;   i    <   args.length;   i++) 
 ps.print(args[i]   +    "    "); 
 //以回车和换行( <CRLF> )结尾 
 ps.print( "\r\n ");   
 //接受相应命令的返回信息 
 theWhoisStream   =   new   DataInputStream(theSocket.getInputStream()); 
 String   s; 
 while   ((s   =   theWhoisStream.readLine())   !=   null)   { 
 System.out.println(s); 
 }   
 //关闭DataInputStream和PrintWriter 
 theWhoisStream.close(); 
 ps.close(); 
 //关闭socket 
 theSocket.close(); 
 break; 
 } 
 catch   (
IOException   e)   {  
System.err.println(e); 
 continue; 
 } 
 } 
 } 
 } 
 根本没有显示System.out.println( "Socket   connected! ");的结果,请大家帮帮忙,是怎么回事啊?不是一个很简单的程序吗?? 
------解决方案--------------------10.0.0.51没有这个IP吧?.......不能连接啊....
------解决方案--------------------java.net.ConnectException: Connection timed out: connect  连接超时 
 1.确认服务器端正常运行了,并且43端口已经被打开 
 2.确认IP地址,10开头地址一般都是不用的?你怎么会用到这个地址的?? 
 本机访问127.0.0.1或者LOCALHOST就行